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Fusè M, Mazzeo G, Longhi G, Abbate S, Yang Q, Bloino J. Scaling-up VPT2: A feasible route to include anharmonic correction on large molecules. Spectrochim Acta A Mol Biomol Spectrosc 2024; 311:123969. [PMID: 38330757 DOI: 10.1016/j.saa.2024.123969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 01/18/2024] [Accepted: 01/24/2024] [Indexed: 02/10/2024]
Abstract
Vibrational analysis plays a crucial role in the investigation of molecular systems. Though methodologies like second-order vibrational perturbation theory (VPT2) have paved the way to more accurate simulations, the computational cost remains a difficult barrier to overcome when the molecular size increases. Building upon recent advances in the identification of resonances, we propose an approach making anharmonic simulations possible for large-size systems, typically unreachable by standard means. This relies on the fact that, often, only portions of the whole spectra are of actual interest. Therefore, the anharmonic corrections can be included selectively on subsets of normal modes directly related to the regions of interest. Starting from the VPT2 equations, we evaluate rigorously and systematically the impact of the truncated anharmonic treatment onto simulations. The limit and feasibility of the reduced-dimensionality approach are detailed, starting on a smaller model system. The methodology is then challenged on the IR absorption and vibrational circular dichroism spectra of an organometallic complex in three different spectral ranges.
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Affiliation(s)
- Marco Fusè
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy.
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy; Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy; Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123, Brescia, Italy
| | - Qin Yang
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Prague, Czech Republic
| | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri, 56125, Pisa, Italy.
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2
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Fusè M, Mazzeo G, Abbate S, Ruzziconi R, Bloino J, Longhi G. Mid-IR and CH stretching vibrational circular dichroism spectroscopy to distinguish various sources of chirality: The case of quinophaneoxazoline based ruthenium(II) complexes. Chirality 2024; 36:e23649. [PMID: 38409881 DOI: 10.1002/chir.23649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/13/2024] [Accepted: 01/15/2024] [Indexed: 02/28/2024]
Abstract
Five diastereomers of ruthenium(II) complexes based on quinolinophaneoxazoline ligands were investigated by vibrational circular dichroism (VCD) in the mid-IR and CH stretching regions. Diastereomers differ in three sources of chirality: the planar chirality of the quinolinophane moiety, the central chirality of an asymmetric carbon atom of the oxazoline ring, and the chirality of the ruthenium atom. VCD, allied to DFT calculations, has been found to be effective in disentangling the various forms of chirality. In particular, a VCD band is identified in the CH stretching region directly connected to the chirality of the metal. The analysis of the calculated VCD spectra is carried out by partitioning the complexes into fragments. The anharmonic analysis is also performed with a recently proposed reduced-dimensionality approach: such treatment is particularly important when examining spectroscopic regions highly perturbed by resonances, like the CH stretching region.
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Affiliation(s)
- Marco Fusè
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica (INO), CNR, Research Unit Brescia, Brescia, Italy
| | - Renzo Ruzziconi
- Dipartimento di Chimica Biologia e Biotecnologie, Università di Perugia, Perugia, Italy
| | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri, Pisa, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica (INO), CNR, Research Unit Brescia, Brescia, Italy
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3
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Cavalloro V, Marchesi N, Linciano P, Rossi D, Campagnoli LIM, Fossati A, Ahmed KM, Malacrida A, Miloso M, Mazzeo G, Abbate S, Longhi G, Ambrosio FA, Costa G, Alcaro S, Pascale A, Martino E, Collina S. Neurodegeneration: can metabolites from Eremurus persicus help? Front Pharmacol 2024; 15:1309766. [PMID: 38370479 PMCID: PMC10873958 DOI: 10.3389/fphar.2024.1309766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 01/19/2024] [Indexed: 02/20/2024] Open
Abstract
The number of patients affected by neurodegenerative diseases is increasing worldwide, and no effective treatments have been developed yet. Although precision medicine could represent a powerful tool, it remains a challenge due to the high variability among patients. To identify molecules acting with innovative mechanisms of action, we performed a computational investigation using SAFAN technology, focusing specifically on HuD. This target belongs to the human embryonic lethal abnormal visual-like (ELAV) proteins and plays a key role in neuronal plasticity and differentiation. The results highlighted that the molecule able to bind the selected target was (R)-aloesaponol-III-8-methyl ether [(R)-ASME], a metabolite extracted from Eremurus persicus. Notably, this molecule is a TNF-α inhibitor, a cytokine involved in neuroinflammation. To obtain a suitable amount of (R)-ASME to confirm its activity on HuD, we optimized the extraction procedure. Together with ASME, another related metabolite, germichrysone, was isolated. Both ASME and germichrysone underwent biological investigation, but only ASME confirmed its ability to bind HuD. Given the multifactorial nature of neurodegenerative diseases, we decided to investigate ASME as a proteasome activator, being molecules endowed with this kind of activity potentially able to counteract aggregations of dysregulated proteins. ASME was able to activate the considered target both in enzymatic and cellular assays. Therefore, ASME may be considered a promising hit in the fight against neurodegenerative diseases.
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Affiliation(s)
- Valeria Cavalloro
- Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy
- National Biodiversity Future Center, Palermo, Italy
| | | | | | - Daniela Rossi
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | | | - Alice Fossati
- Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy
- National Biodiversity Future Center, Palermo, Italy
| | - Karzan Mahmood Ahmed
- Department of Chemistry, College of Education, University of Garmian, Kalar, Iraq
| | - Alessio Malacrida
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
- Experimental Neurology Unit, University of Milano-Bicocca, Monza, Italy
| | - Mariarosaria Miloso
- School of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
- Experimental Neurology Unit, University of Milano-Bicocca, Monza, Italy
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
| | - Francesca Alessandra Ambrosio
- Department of Experimental and Clinical Medicine, University “Magna Græcia” of Catanzaro, Campus “S. Venuta”, Catanzaro, Italy
| | - Giosuè Costa
- Department of Health Sciences, Campus “S. Venuta”, “Magna Græcia” University of Catanzaro, Catanzaro, Italy
- Net4Science Academic Spin-Off, University “Magna Græcia” of Catanzaro, Campus “S. Venuta”, Catanzaro, Italy
| | - Stefano Alcaro
- Department of Health Sciences, Campus “S. Venuta”, “Magna Græcia” University of Catanzaro, Catanzaro, Italy
- Net4Science Academic Spin-Off, University “Magna Græcia” of Catanzaro, Campus “S. Venuta”, Catanzaro, Italy
- Associazione CRISEA–Centro di Ricerca e Servizi Avanzati per l’Innovazione Rurale, Italy
| | - Alessia Pascale
- Department of Drug Sciences, University of Pavia, Pavia, Italy
| | - Emanuela Martino
- Department of Earth and Environmental Sciences, University of Pavia, Pavia, Italy
- National Biodiversity Future Center, Palermo, Italy
| | - Simona Collina
- Department of Drug Sciences, University of Pavia, Pavia, Italy
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4
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Fusè M, Mazzeo G, Bloino J, Longhi G, Abbate S. Pushing measurements and interpretation of VCD spectra in the IR, NIR and visible ranges to the detectability and computational complexity limits. Spectrochim Acta A Mol Biomol Spectrosc 2024; 305:123496. [PMID: 37832448 DOI: 10.1016/j.saa.2023.123496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/29/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
(R)-Limonene VCD and IR absorption spectra for neat liquid samples are considered from 900 to 16,000 cm-1, using mostly data by Nafie et al. up to 10,000 cm-1 and from previous investigations of the Brescia group. New VCD data are recorded in the merely overtone and combination region between 1800 and 2400 cm-1 and for the Δn= 6 overtone CH-stretching region above 15,000 cm-1. The GVPT2 anharmonic DFT calculations permit satisfactory interpretation of the fundamental + overtone/combination of deformation modes in the mid-IR up to 3500 cm-1. The GVPT2 approach is also used for the first CH-stretching overtone regions together with their combination with deformation modes up to 9000 cm-1. Then the local-mode approach developed within the DFT protocol is employed in all the CH-stretching regions (fundamental + overtones) and is found to satisfactorily account for the observed spectra, justifying the constant VCD pattern observed for all overtones. On the basis of the local-mode model the components of the bisignate VCD spectrum are attributed to the stretchings of the axial and equatorial CH bonds in α-position with respect to the ring CC double bond.
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Affiliation(s)
- Marco Fusè
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy
| | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri, 56125, Pisa, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy; Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy; Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123, Brescia, Italy.
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5
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Mazzeo G, Fusè M, Evidente A, Abbate S, Longhi G. Circularly polarized luminescence of natural products lycorine and narciclasine: role of excited-state intramolecular proton-transfer and test of pH sensitivity. Phys Chem Chem Phys 2023; 25:22700-22710. [PMID: 37605892 DOI: 10.1039/d3cp02600k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Circularly polarized luminescence (CPL) is increasingly gaining interest not only for its applicative potentialities but also for providing an understanding of the excited state properties of chiral molecules. However, applications of CPL are mainly in the field of materials science: special organic molecules and polymers, metal (lanthanide) complexes, and organic dyes are actively and intensely studied. So far natural compounds have not been investigated much. We fill the gap here by measuring circular dichroism (CD) and CPL of lycorine and narciclasine, the most abundant known alkaloid and isocarbostyril from Amaryllidaceae, which exhibit a large spectrum of biological activities and are promising anticancer compounds. Dual fluorescence detection in narciclasine led us to unveil an occurring excited-state intramolecular proton transfer (ESIPT) process, this mechanism well accounts for the Stokes shift and CPL spectra observed in narciclasine. The same molecule is interesting also as a pH chiroptical switch. Both in absorption and emission, lycorine and narciclasine are also studied computationally via density functional theory (DFT) calculations further shedding light on their properties.
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Affiliation(s)
- Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123 Brescia, Italy.
| | - Marco Fusè
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123 Brescia, Italy.
| | - Antonio Evidente
- Department of Chemical Science Università di Napoli Federico II, Via Cintia, 21, 80126, Napoli, Italy
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/O, 70185 Bari, Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123 Brescia, Italy.
- National Institute of Optics-CNR, Brescia Research Unit, via Branze 45, 25123, Brescia, Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa,11, 25123 Brescia, Italy.
- National Institute of Optics-CNR, Brescia Research Unit, via Branze 45, 25123, Brescia, Italy
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Penasa R, Begato F, Licini G, Wurst K, Abbate S, Longhi G, Zonta C. Fluorescence detected circular dichroism (FDCD) of a stereodynamic probe. Chem Commun (Camb) 2023; 59:6714-6717. [PMID: 37191071 DOI: 10.1039/d3cc01249b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The use of chiroptical techniques in combination with stereodynamic probes is becoming one of the leading strategies for chiral sensing. While in most of the reported studies circular dichroism (CD) is the adopted spectroscopic technique, examples regarding the use of vibrational CD (VCD), circularly polarized luminescence (CPL), and Raman optical activity (ROA) are emerging as innovative tools. In this communication, an anthracene-decorated tris(2-pyridylmethyl)amine zinc complex (TPMA) is reported for its capability to act as a chiral sensor using either CD or fluorescence detected circular dichroism (FDCD). The latter technique offers the unique possibility to determine the enantiomeric excess of a series of carboxylic acids at sensor concentrations down to 0.1 μM. Limitations and possibilities opened by the use of this methodology, in particular regarding the specificity of the probe in the presence of another contaminant, are discussed.
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Affiliation(s)
- Roberto Penasa
- Dipartimento di Scienze Chimiche Università degli Studi di Padova, via Marzolo 1, Padova 35131, Italy.
| | - Federico Begato
- Dipartimento di Scienze Chimiche Università degli Studi di Padova, via Marzolo 1, Padova 35131, Italy.
| | - Giulia Licini
- Dipartimento di Scienze Chimiche Università degli Studi di Padova, via Marzolo 1, Padova 35131, Italy.
| | - Klaus Wurst
- Department of General, Inorganic and Theoretical Chemistry University of Innsbruck, Innsbruck A-6020, Austria
| | - Sergio Abbate
- Department of Molecular and Translational Medicine Università degli Studi di Brescia Viale Europa 11 - 25123 Brescia - BS (Italy) and Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, via Branze 45, Brescia 25123, Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine Università degli Studi di Brescia Viale Europa 11 - 25123 Brescia - BS (Italy) and Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, via Branze 45, Brescia 25123, Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche Università degli Studi di Padova, via Marzolo 1, Padova 35131, Italy.
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Ramos-Mejía R, del Pino M, Aza-Carmona M, Abbate S, Obregon MG, Heath KE, Fano V. Novel FLNB Variants in Seven Argentinian Cases with Spondylocarpotarsal Synostosis Syndrome. J Pediatr Genet 2022. [DOI: 10.1055/s-0042-1759782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AbstractSpondylocarpotarsal synostosis syndrome (SCT) is a very rare skeletal dysplasia characterized by vertebral, carpal, and tarsal fusion; growth retardation; and mild dysmorphic facial features. Variants in FLNB, MYH3, and RFLNA have been implicated in this dysplasia. We report the clinical and radiological follow-up of seven SCT pediatric cases associated with biallelic FLNB variants, from four Argentinian families. The seven cases share previously described facial characteristics: round facies, large eyes, and wide based nose; all of them had variable height deficit, in one case noted early in life. Other findings included clinodactyly, joint limitation without bone fusion, neurosensorial hearing loss, and ophthalmological compromise. All cases presented with spinal fusion with variable severity and location, carpal bones coalition, and also delay in carpal ossification. The heterozygous carrier parents had normal height values to −2.5 score standard deviation, without skeletal defects detected. Three different FLNB variants, one nonsense and two frameshift, were detected, all of which were predicted to result in a truncated protein or are degraded by nonsense mediated decay. All cases had at least one copy of the nonsense variant, c.1128C> G; p. (Tyr376*), suggesting the presence of a common ancestor.
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Affiliation(s)
- R Ramos-Mejía
- Growth and Development Department, Hospital Garrahan, Buenos Aires, Argentina
| | - M del Pino
- Growth and Development Department, Hospital Garrahan, Buenos Aires, Argentina
| | - M Aza-Carmona
- Centro de Investigacion Biomédica en Red Enfermedades Raras (CIBERER), ISCIII, Madrid, España
- Institute of Medical and Molecular Genetics (INGEMM), Hospital Universitario La Paz, Universidad Autónoma de Madrid, Madrid, España
- Skeletal Dysplasia Multidisciplinary Unit (UMDE-ERN BOND), Hospital Universitario La Paz, Universidad Autonóma de Madrid, Madrid, España
| | - S Abbate
- Genetics Department, Hospital Garrahan, Buenos Aires, Argentina
| | - M G. Obregon
- Genetics Department, Hospital Garrahan, Buenos Aires, Argentina
| | - K E. Heath
- Centro de Investigacion Biomédica en Red Enfermedades Raras (CIBERER), ISCIII, Madrid, España
- Institute of Medical and Molecular Genetics (INGEMM), Hospital Universitario La Paz, Universidad Autónoma de Madrid, Madrid, España
- Skeletal Dysplasia Multidisciplinary Unit (UMDE-ERN BOND), Hospital Universitario La Paz, Universidad Autonóma de Madrid, Madrid, España
| | - V Fano
- Growth and Development Department, Hospital Garrahan, Buenos Aires, Argentina
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Fusè M, Longhi G, Mazzeo G, Stranges S, Leonelli F, Aquila G, Bodo E, Brunetti B, Bicchi C, Cagliero C, Bloino J, Abbate S. Anharmonic Aspects in Vibrational Circular Dichroism Spectra from 900 to 9000 cm -1 for Methyloxirane and Methylthiirane. J Phys Chem A 2022; 126:6719-6733. [PMID: 36126273 PMCID: PMC9527749 DOI: 10.1021/acs.jpca.2c05332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Vibrational circular dichroism (VCD) spectra and the
corresponding
IR spectra of the chiral isomers of methyloxirane and of methylthiirane
have been reinvestigated, both experimentally and theoretically, with
particular attention to accounting for anharmonic corrections, as
calculated by the GVPT2 approach. De novo recorded VCD spectra in
the near IR (NIR) range regarding CH-stretching overtone transitions,
together with the corresponding NIR absorption spectra, were also
considered and accounted for, both with the GVPT2 and with the local
mode approaches. Comparison of the two methods has permitted us to
better describe the nature of active “anharmonic” modes
in the two molecules and the role of mechanical and electrical anharmonicity
in determining the intensities of VCD and IR/NIR data. Finally, two
nonstandard IR/NIR regions have been investigated: the first one about
≈2000 cm–1, involving mostly two-quanta bending
mode transitions, the second one between 7000 and 7500 cm–1 involving three-quanta transitions containing CH-stretching overtones
and HCC/HCH bending modes.
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Affiliation(s)
- Marco Fusè
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123 Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Stefano Stranges
- Dipartimento di Chimica e Tecnologia del Farmaco, Università"La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.,IOM-CNR, Laboratorio TASC, Basovizza, 34149 Trieste, Italy
| | - Francesca Leonelli
- Dipartimento di Chimica, Università"La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Giorgia Aquila
- Dipartimento di Chimica, Università"La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Enrico Bodo
- Dipartimento di Chimica, Università"La Sapienza", P.le A. Moro 5, 00185 Roma, Italy
| | - Bruno Brunetti
- ISMN-CNR, Università La Sapienza, P.le A. Moro 5, 00185 Roma, Italy
| | - Carlo Bicchi
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Via Pietro Giuria 9,00124 Torino, Italy
| | - Cecilia Cagliero
- Dipartimento di Scienza e Tecnologia del Farmaco, Università degli Studi di Torino, Via Pietro Giuria 9,00124 Torino, Italy
| | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri, 56125, Pisa, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, VIA Branze 45, 25123 Brescia, Italy
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9
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Summa A, Scafato P, Belviso S, Monaco G, Zanasi R, Longhi G, Abbate S, Superchi S. Synthesis and Stereochemical Characterization of a Novel Chiral α-Tetrazole Binaphthylazepine Organocatalyst. Molecules 2022; 27:molecules27165113. [PMID: 36014353 PMCID: PMC9413694 DOI: 10.3390/molecules27165113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/02/2022] [Accepted: 08/08/2022] [Indexed: 12/03/2022] Open
Abstract
A novel α-tetrazole-substituted 1,1′-binaphthylazepine chiral catalyst has been synthesized and its absolute configuration has been determined by DFT computational analysis of the vibrational circular dichroism (VCD) spectrum of its precursor. The VCD analysis, carried out through the model averaging method, allowed to assign the absolute configuration of a benzylic stereocenter in the presence of a chiral binaphthyl moiety. The 1,1′-binaphthylazepine tetrazole and the nitrile its immediate synthetic precursor, have been preliminarily tested as chiral organocatalysts in the asymmetric intramolecular oxa-Michael cyclization of 2-hydroxy chalcones for the synthesis of chiral flavanones obtaining low enantioselectivity.
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Affiliation(s)
- Assunta Summa
- Department of Sciences, University of Basilicata, Via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Patrizia Scafato
- Department of Sciences, University of Basilicata, Via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Sandra Belviso
- Department of Sciences, University of Basilicata, Via dell’Ateneo Lucano 10, 85100 Potenza, Italy
| | - Guglielmo Monaco
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Via Giovanni Paolo II, 84084 Salerno, Italy
| | - Riccardo Zanasi
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Via Giovanni Paolo II, 84084 Salerno, Italy
| | - Giovanna Longhi
- Department Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123 Brescia, Italy
- Unit of Brescia, Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT, 25123 Brescia, Italy
| | - Sergio Abbate
- Department Molecular and Translational Medicine, University of Brescia, viale Europa 11, 25123 Brescia, Italy
- Unit of Brescia, Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT, 25123 Brescia, Italy
| | - Stefano Superchi
- Department of Sciences, University of Basilicata, Via dell’Ateneo Lucano 10, 85100 Potenza, Italy
- Correspondence:
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10
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Mangiavacchi F, Mazzeo G, Graziani MC, Marini F, Drabowicz J, Wielgus E, Sancineto L, Longhi G, Vivani R, Abbate S, Santi C. A Vibrational and Electronic Circular Dichroism Study of Chiral Seleno Compounds Prepared from a Novel Naphthol based Diselenide. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
| | - Giuseppe Mazzeo
- Brescia University Department of Molecular and Translational Medicine ITALY
| | - Maria Chiara Graziani
- University of Perugia: Universita degli Studi di Perugia Scienze Farmaceutiche ITALY
| | - Francesca Marini
- University of Perugia: Universita degli Studi di Perugia Scienze Farmaceutiche ITALY
| | - Józef Drabowicz
- Polish Academy of Sciences Centre of Molecular and Macromolecular Studies: Polska Akademia Nauk Centrum Badan Molekularnych i Makromolekularnych Organic Chemistry POLAND
| | - Ewelina Wielgus
- Centre of Molecular and Macromolecular Studies PAS: Polska Akademia Nauk Centrum Badan Molekularnych i Makromolekularnych Structural Chemistry POLAND
| | - Luca Sancineto
- University of Perugia: Universita degli Studi di Perugia Scienze Farmaceutiche ITALY
| | - Giovanna Longhi
- Brescia University Department of Molecular and Translational Medicine ITALY
| | - Riccardo Vivani
- University of Perugia: Universita degli Studi di Perugia Scienze Farmaceutiche ITALY
| | - Sergio Abbate
- Brescia University Department of Molecular and Translational Medicine ITALY
| | - Claudio Santi
- University of Perugia: Universita degli Studi di Perugia Scienze Farmaceutiche Via del Liceo 06100 Perugia ITALY
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11
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Mazzeo G, Pedotti S, Longhi G, Patti A, Abbate S. Spectroscopic investigation on 1,2-substituted ferrocenes with only planar chirality: How chiroptical data are related to absolute configuration and to substituents. Spectrochim Acta A Mol Biomol Spectrosc 2022; 272:121010. [PMID: 35180485 DOI: 10.1016/j.saa.2022.121010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/28/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Single enantiomers of three 1,2-substituted ferrocene derivatives, i.e. 1-methoxymethyl-2-hydroxymethylferrocene (1), 1-formyl-2-hydroxymethylferrocene (2) and 1-iodo-2-hydroxymethylferrocene (3), sharing the common hydroxymethyl substituent and the presence of planar chirality only, were investigated for their spectroscopic (IR and UV) and chiroptical (VCD and ECD) properties. Both enantiomers of 1 were obtained for the first time in optically pure form by lipase-catalyzed kinetic resolution of the corresponding racemate (±)-1 and separately converted into formyl derivatives (+)-2 and (-)-2. The experimental spectroscopic and chiroptical data were compared with DFT calculated spectra and excellent correspondence was found for all compounds, allowing one to confirm the previously assigned absolute configurations. The common features in the VCD spectra of a doublet between 940 and 965 cm-1 and the short-wavelength (about 200 nm) doublet and the longest wavelength band in the ECD spectra were analyzed to test whether they may be taken as markers of the absolute configuration (AC). The predominance of conformers with intramolecular hydrogen bond for the first two investigated compounds is predicted by conformational analysis and also confirmed by NMR.
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Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Universita di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sonia Pedotti
- Institute of Biomolecular Chemistry - CNR, Via Paolo Gaifami 18, 95126 Catania, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Universita di Brescia, Viale Europa 11, 25123 Brescia, Italy; INO-CNR, Sede Secondaria di Brescia, via Branze, 45 - 25123 Brescia, Italy
| | - Angela Patti
- Institute of Biomolecular Chemistry - CNR, Via Paolo Gaifami 18, 95126 Catania, Italy.
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Universita di Brescia, Viale Europa 11, 25123 Brescia, Italy; INO-CNR, Sede Secondaria di Brescia, via Branze, 45 - 25123 Brescia, Italy.
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12
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Bravin C, Mazzeo G, Abbate S, Licini G, Longhi G, Zonta C. Helicity control of a perfluorinated carbon chain within a chiral supramolecular cage monitored by VCD. Chem Commun (Camb) 2022; 58:2152-2155. [PMID: 35059695 DOI: 10.1039/d1cc06861j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Confinement within supramolecular systems is the leading technology to finely tune guest functional properties. In this communication we report the synthesis of a chiral supramolecular cage able to bias the helicity of a perfluorinated carbon chain hosted within the cage. We monitor the phenomenon of chiral induction by Vibrational Circular Dichroism (VCD) experiments complemented by DFT calculations over the possible conformers.
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Affiliation(s)
- Carlo Bravin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, BS, Italy.
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova, PD, Italy.
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13
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Lupi M, Onori M, Menichetti S, Abbate S, Longhi G, Viglianisi C. Resolution of a Configurationally Stable Hetero[4]helicene. Molecules 2022; 27:molecules27041160. [PMID: 35208947 PMCID: PMC8874595 DOI: 10.3390/molecules27041160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/03/2022] Open
Abstract
We have developed an efficient chemical resolution of racemic hydroxy substituted dithia-aza[4]helicenes (DTA[4]H) 1(OH) using enantiopure acids as resolving agents. The better diastereomeric separation was achieved on esters prepared with (1S)-(−)-camphanic acid. Subsequent simple manipulations produced highly optically pure (≥ 99% enantiomeric excess) (P) and (M)-1(OH) in good yields. The role of the position where the chiral auxiliary is inserted (cape- vs. bay-zone) and the structure of the enantiopure acid used on successful resolution are discussed.
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Affiliation(s)
- Michela Lupi
- Department of Chemistry “Ugo Schiff” (DICUS), University of Florence, Via della Lastruccia 13, Sesto Fiorentino (FI), 50019 Florence, Italy; (M.L.); (M.O.); (S.M.)
| | - Martina Onori
- Department of Chemistry “Ugo Schiff” (DICUS), University of Florence, Via della Lastruccia 13, Sesto Fiorentino (FI), 50019 Florence, Italy; (M.L.); (M.O.); (S.M.)
| | - Stefano Menichetti
- Department of Chemistry “Ugo Schiff” (DICUS), University of Florence, Via della Lastruccia 13, Sesto Fiorentino (FI), 50019 Florence, Italy; (M.L.); (M.O.); (S.M.)
| | - Sergio Abbate
- Department of Molecular and Translational Medicine (DMMT), University of Brescia, V.le Europa 11 Brescia (BS), 25121 Brescia, Italy; (S.A.); (G.L.)
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine (DMMT), University of Brescia, V.le Europa 11 Brescia (BS), 25121 Brescia, Italy; (S.A.); (G.L.)
| | - Caterina Viglianisi
- Department of Chemistry “Ugo Schiff” (DICUS), University of Florence, Via della Lastruccia 13, Sesto Fiorentino (FI), 50019 Florence, Italy; (M.L.); (M.O.); (S.M.)
- Correspondence:
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14
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Chalifoux WA, Sitaula P, Malone RJ, Longhi G, Abbate S, Gualtieri E, Lucotti A, Tommasini M, Franzini R, Villani C, Catalano VJ. π‐Extended Helical Nanographenes: Synthesis and Photophysical Properties of Naphtho[1,2‐a]pyrenes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Wesley A. Chalifoux
- University of Nevada, Reno Chemistry 1664 N. Virginia StreetDepartment of Chemistry, MS216 89557 Reno UNITED STATES
| | | | | | - Giovanna Longhi
- Università degli Studi di Brescia Dipartimento di Medicina Molecolare e Traslazionale: Universita degli Studi di Brescia Dipartimento di Medicina Molecolare e Traslazionale Dipartimento di Medicina Molecolare e Traslazionale ITALY
| | - Sergio Abbate
- Università degli Studi di Brescia Dipartimento di Medicina Molecolare e Traslazionale: Universita degli Studi di Brescia Dipartimento di Medicina Molecolare e Traslazionale Dipartimento di Medicina Molecolare e Traslazionale ITALY
| | - Eva Gualtieri
- Politecnico di Milano Dipartimento di Chimica Materiali e Ingegneria Chimica Giulio Natta Materiali e Ingegneria Chimica "G. Natta" ITALY
| | - Andrea Lucotti
- Politecnico di Milano Dipartimento di Chimica Materiali e Ingegneria Chimica Giulio Natta Dipartimento di Chimica, Materiali e Ingegneria Chimica "G. Natta" ITALY
| | - Matteo Tommasini
- Politecnico di Milano Dipartimento di Chimica Materiali e Ingegneria Chimica Giulio Natta Dipartimento di Chimica, Materiali e Ingegneria Chimica "G. Natta" ITALY
| | - Roberta Franzini
- University of Rome La Sapienza Department of Chemistry: Universita degli Studi di Roma La Sapienza Dipartimento di Chimica Dipartimento di Chimica e Tecnologie del Farmaco ITALY
| | - Claudio Villani
- University of Rome: Universita degli Studi di Roma La Sapienza Dipartimento di Chimica e Tecnologie del Farmaco ITALY
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15
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Belviso S, Marsico G, Franzini R, Villani C, Abbate S, LONGHI G. Inherently Chiral Helicene-Substituted Thioalkyl Porphyrazine Complexes: Synthesis, Electronic, and Chiroptical Properties. Dalton Trans 2022; 51:16453-16464. [DOI: 10.1039/d2dt02665a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chiral Ni(II) and Pd(II) complexes of [6]helicene thioethyl porphyrazine have been synthesized and their spectroscopic, electrochemical, and chiroptical properties have been investigated by experimental and computational analyses. In these...
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16
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Mazzeo G, Cimmino A, Longhi G, Masi M, Evidente A, Abbate S. The Assignment of the Absolute Configuration of Non-Cyclic Sesquiterpenes by Vibrational and Electronic Circular Dichroism: The Example of Chiliadenus lopadusanus Metabolites. Biomolecules 2021; 11:biom11121902. [PMID: 34944545 PMCID: PMC8699476 DOI: 10.3390/biom11121902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/10/2021] [Accepted: 12/16/2021] [Indexed: 11/16/2022] Open
Abstract
9-Hydroxynerolidol, 9-oxonerolidol, and chiliadenol B are three farnesane-type sesquiterpenoids isolated from Chiliadenus lopadusanus that have shown an interesting activity against human pathogens as Gram+ and Gram- bacteria resistant to antibiotics. However, the absolute configuration (AC) of these interesting sesquiterpenes has not been assigned so far. Vibrational and electronic circular dichroism spectra have been recorded and correlations are pointed out for the three compounds. Density functional theory (DFT) calculations are used in conjunction with Mosher's method of investigation to assign AC. Statistical analysis is considered to quantitatively define the choice of AC from VCD spectra.
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Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy; (G.M.); (G.L.)
| | - Alessio Cimmino
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant’Angelo, 80126 Napoli, Italy; (A.C.); (M.M.); (A.E.)
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy; (G.M.); (G.L.)
| | - Marco Masi
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant’Angelo, 80126 Napoli, Italy; (A.C.); (M.M.); (A.E.)
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant’Angelo, 80126 Napoli, Italy; (A.C.); (M.M.); (A.E.)
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy; (G.M.); (G.L.)
- Correspondence: ; Tel.: +39-030-3717415
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17
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Mazzeo G, Ghidinelli S, Ruzziconi R, Grandi M, Abbate S, Longhi G. Circularly Polarized Luminescence of Some [2]Paracyclo[2](5,8)quinoliphane Derivatives with Planar and Central Chirality. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Giuseppe Mazzeo
- Department of Molecular and Translational Medicine University of Brescia Viale Europa 11 25123 Brescia Italy
| | - Simone Ghidinelli
- Department of Molecular and Translational Medicine University of Brescia Viale Europa 11 25123 Brescia Italy
| | - Renzo Ruzziconi
- Department of Chemistry, Biology and Biotechnologies University of Perugia Viale Elce di Sotto 8 06123 Perugia Italy
| | - Marco Grandi
- Jasco Europe Via Luigi Cadorna, 1 23894 Cremella LC Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine University of Brescia Viale Europa 11 25123 Brescia Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine University of Brescia Viale Europa 11 25123 Brescia Italy
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18
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Ghidinelli S, Abbate S, Mazzeo G, Paolesse R, Pomarico G, Longhi G. MCD and MCPL Characterization of Luminescent Si(IV) and P(V) Tritolylcorroles: The Role of Coordination Number. ACS Omega 2021; 6:26659-26671. [PMID: 34661019 PMCID: PMC8515824 DOI: 10.1021/acsomega.1c04028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Two triarylcorrole complexes, (hydroxy)[5,10,15-tritolylcorrolato]silicon-(TTC)Si(OH) and (dihydroxy)[5,10,15-tritolylcorrolato]phosphorous-(TTC)P(OH) 2 , have been investigated by magnetic circular dichroism (MCD) and magnetic circularly polarized luminescence (MCPL). The spectroscopic investigations have been combined with explicit calculation of MCD response through time-dependent density functional theory (TD-DFT) formalism. This has allowed us to better define the role of molecular orbitals in the transitions associated with the Soret and Q bands. Besides and more importantly, MCD has made it possible to follow the titration process of (TTC)Si(OH) in dimethyl sulfoxide (DMSO) solution with NaF and of (TTC)P(OH) 2 in dichloromethane solution with alcohols in a complementary and, we dare say, more sensitive way with respect to absorption and fluorescence data. Finally, the MCPL spectra and the ancillary TD-DFT calculations have allowed us to characterize the excited state of (TTC)Si(OH).
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Affiliation(s)
- Simone Ghidinelli
- Department
of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Department
of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- National
Institute of Optics (INO), CNR, Research
Unit of Brescia, c/o
CSMT, via Branze 45, 25123 Brescia, Italy
| | - Giuseppe Mazzeo
- Department
of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Roberto Paolesse
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Giuseppe Pomarico
- Department
of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- CSGI,
Research Center for Colloids and Nanoscience, Via della Lastruccia 3, Sesto
Fiorentino, 50019 Firenze, Italy
| | - Giovanna Longhi
- Department
of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
- National
Institute of Optics (INO), CNR, Research
Unit of Brescia, c/o
CSMT, via Branze 45, 25123 Brescia, Italy
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19
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Ghidinelli S, Abbate S, Mazzeo G, Boiadjiev SE, Lightner DA, Longhi G. Biliverdin chiral derivatives as chiroptical switches for pH and metal cation sensing. Phys Chem Chem Phys 2021; 23:20138-20151. [PMID: 34551042 DOI: 10.1039/d1cp02571f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of six optically active derivatives of the bile pigment biliverdin, namely (βS,β'S)-dimethylmesobiliverdin-XIIIα, cyclic esters of linear diols [HO(CH2)nOH] where n = 1-6, have been investigated by vibrational circular dichroism (VCD) and density functional theory (DFT) calculations. The results were correlated with the length (n) of the diester belt, the verdin helicity and an M ⇄ P conformational equilibrium - as previously shown by electronic circular dichroism (ECD). Furthermore, ECD spectra have been found to be quite sensitive to solvent nature and pH. TD-DFT calculations of the protonated/deprotonated verdins with n = 1 and 2 diester belts respectively have allowed one, moreover, to explain the spectroscopic data in terms of a change in the M ⇄ P equilibrium. Finally, the set of investigated compounds, together with other chirally functionalized "non-belted" biliverdin analogs, has also been found to be sensitive to the presence of metal ions, with which the verdins chelate. On the basis of ECD and VCD data, we propose that the spectroscopic changes observed are consistent with self-association (dimerization) of the verdin molecules promoted by the metal cations, as bolstered by DFT calculations, and for which a dimerization constant of 73 000 M-1 is evaluated. We envision the use of current chiroptical spectroscopies in connection with chiral biliverdin derivatives as natural sensors or probes of the micro-environmental conditions, such as pH or the presence of metal ions.
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Affiliation(s)
- Simone Ghidinelli
- Università di Brescia, Dipartimento di Medicina Molecolare e Traslazionale, Viale Europa 11, 25123 Brescia, Italy.
| | - Sergio Abbate
- Università di Brescia, Dipartimento di Medicina Molecolare e Traslazionale, Viale Europa 11, 25123 Brescia, Italy. .,Istituto Nazionale di Ottica (INO), C.N.R., Research Unit of Brescia, via Branze 45, 25123 Brescia, Italy
| | - Giuseppe Mazzeo
- Università di Brescia, Dipartimento di Medicina Molecolare e Traslazionale, Viale Europa 11, 25123 Brescia, Italy.
| | - Stefan E Boiadjiev
- Regional Health Inspectorate, 7 Prince Al. Battenberg I Str., 5800 Pleven, Bulgaria
| | - David A Lightner
- Chemistry Department, University of Nevada, Reno, NV, 89557, USA
| | - Giovanna Longhi
- Università di Brescia, Dipartimento di Medicina Molecolare e Traslazionale, Viale Europa 11, 25123 Brescia, Italy. .,Istituto Nazionale di Ottica (INO), C.N.R., Research Unit of Brescia, via Branze 45, 25123 Brescia, Italy
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20
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Reiné P, Ortuño AM, Resa S, Álvarez de Cienfuegos L, Ribagorda M, Mota AJ, Abbate S, Longhi G, Miguel D, Cuerva JM. Enantiopure Double
ortho
‐Oligophenylethynylene‐Based Helical Structures with Circularly Polarized Luminescence Activity. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Pablo Reiné
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Ana M. Ortuño
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Sandra Resa
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - María Ribagorda
- Organic Chemistry Department Department of Organic Chemistry Universidad Autonoma de Madrid C/Francisco Tomás y Valiente n° 7 Cantoblanco 28049 Madrid Spain
| | - Antonio J. Mota
- Department of Inorganic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Sergio Abbate
- Department of Molecular and Translational Medicine Instituto Nazionale di Ottica – CNR Brescia Research Unit Università di Brescia Via Branze 45 25123 Brescia Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine Instituto Nazionale di Ottica – CNR Brescia Research Unit Università di Brescia Via Branze 45 25123 Brescia Italy
| | - Delia Miguel
- Physical Chemistry Department Unidad de Excelencia de Química University of Granada Faculty of Pharmacy, C. U. Cartuja 18071 Granada Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
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21
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Ravutsov M, Dobrikov GM, Dangalov M, Nikolova R, Dimitrov V, Mazzeo G, Longhi G, Abbate S, Paoloni L, Fusè M, Barone V. 1,2-Disubstituted Planar Chiral Ferrocene Derivatives from Sulfonamide-Directed ortho-Lithiation: Synthesis, Absolute Configuration, and Chiroptical Properties. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00712] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Ravutsov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Georgi M. Dobrikov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Miroslav Dangalov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Rositsa Nikolova
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 107, Sofia 1113, Bulgaria
| | - Vladimir Dimitrov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Research Unit of Brescia, Istituto Nazionale di Ottica (INO), CNR, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Research Unit of Brescia, Istituto Nazionale di Ottica (INO), CNR, 25123 Brescia, Italy
| | - Lorenzo Paoloni
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Marco Fusè
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
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22
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Ghidinelli S, Longhi G, Abbate S, Hättig C, Coriani S. Magnetic Circular Dichroism of Naphthalene Derivatives: A Coupled Cluster Singles and Approximate Doubles and Time-Dependent Density Functional Theory Study. J Phys Chem A 2021; 125:243-250. [PMID: 33355445 DOI: 10.1021/acs.jpca.0c09669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The UV-vis absorption and magnetic circular dichroism spectra of naphthalene and some of its derivatives have been simulated at the Coupled Cluster Singles and Approximate Doubles (CC2) level of theory, and at the Time-Dependent Density Functional Theory (TD-DFT) level using the B3LYP and CAM-B3LYP functionals. DFT and CC2 predict in general opposite energetic ordering of the Lb and La transitions (in gas phase), as previously observed in adenine. The CC2 simulations of UV and MCD spectra show the best agreement with the experimental data. Analysis of the Cartesian components of the electric dipole transition strengths and the magnetic dipole transition moment between the excited states have been considered in the interpretation of the electronic transitions and the Faraday B term inversion among the naphthalene derivatives.
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Affiliation(s)
- S Ghidinelli
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - G Longhi
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - S Abbate
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - C Hättig
- Arbeitsgruppe Quantenchemie, Ruhr-Universität Bochum, D-44780, Germany
| | - S Coriani
- DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kongens Lyngby, Denmark
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23
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Ghidinelli S, Abbate S, Santoro E, Belviso S, Longhi G. Characterization of "Free Base" and Metal Complex Thioalkyl Porphyrazines by Magnetic Circular Dichroism and TDDFT Calculations. J Phys Chem B 2021; 125:264-280. [PMID: 33351631 PMCID: PMC8016196 DOI: 10.1021/acs.jpcb.0c09277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
![]()
UV–vis
absorption and magnetic circular dichroism (MCD)
spectra of octakis thioethyl “free base” porphyrazine
H2OESPz and its metal complexes MOESPz (M = Mg, Zn, Ni,
Pd, Cu), as well as of [MnOESPz(SH)] were recorded. In the last case,
MCD proved to have quite good sensitivity to the coordination of this
complex with 1-methylimidazole (1-mim) in benzene. Time-dependent
density functional theory (TDDFT) calculations were carried out for
the considered porphyrazine complexes and showed good performance
on comparing with MCD and UV–vis experimental spectra, even
in the open-shell Cu and Mn cases. Calculations accounted for the
red shift observed in the thioalkyl compounds and allowed us to reveal
the role of sulfur atoms in spectroscopically relevant molecular orbitals
and to highlight the importance of the conformations of the thioethyl
external groups. Calculated MCD spectra of [MnOESPz(SH)] confirm the
Mn(III) → Mn(II) redox process, which leads to the [Mn(OESPz)(1-mim)2] species, and the relevance of the spin state for MCD is
revealed.
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Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Research Unit of Brescia, CNR, Istituto Nazionale di Ottica (INO), c/o CSMT, via Branze 45, 25123 Brecia, Italy
| | - Ernesto Santoro
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Dipartimento di Scienze, Università della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Sandra Belviso
- Dipartimento di Scienze, Università della Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Research Unit of Brescia, CNR, Istituto Nazionale di Ottica (INO), c/o CSMT, via Branze 45, 25123 Brecia, Italy
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24
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Pelliccioli V, Franzini R, Mazzeo G, Villani C, Abbate S, Longhi G, Licandro E, Cauteruccio S. Chiral bis(benzo[1,2- b:4,3- b′]dithiophene) atropisomers: experimental and theoretical investigations of the stereochemical and chiroptical properties. NEW J CHEM 2021. [DOI: 10.1039/d1nj03248h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conformational chirality is a feature that may arise from the presence of a hindered rotation around a single bond that corresponds to a stereogenic axis.
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Affiliation(s)
- Valentina Pelliccioli
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milan, Italy
| | - Roberta Franzini
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Claudio Villani
- Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, via Branze 45, 25123 Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, via Branze 45, 25123 Brescia, Italy
| | - Emanuela Licandro
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milan, Italy
| | - Silvia Cauteruccio
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, I-20133 Milan, Italy
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25
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Ortuño AM, Reiné P, Resa S, Álvarez de Cienfuegos L, Blanco V, Paredes JM, Mota AJ, Mazzeo G, Abbate S, Ugalde JM, Mujica V, Longhi G, Miguel D, Cuerva JM. Extended enantiopure ortho-phenylene ethylene ( o-OPE)-based helical systems as scaffolds for supramolecular architectures: a study of chiroptical response and its connection to the CISS effect. Org Chem Front 2021. [DOI: 10.1039/d1qo00822f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Versatile enantiopure helical systems are described and are of interest owing to their intense chiroptical responses, their attractive architecture for metallosupramolecular chemistry and CISS effect.
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Affiliation(s)
- Ana M. Ortuño
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Pablo Reiné
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Sandra Resa
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Victor Blanco
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | | | - Antonio J. Mota
- Department of Inorganic Chemistry, Faculty of Science, UGR-UEQ
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Jesus M. Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Vladimiro Mujica
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
- Arizona State University, School of Molecular Sciences, Tempe, AZ 85287, USA
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Delia Miguel
- Department of Physical Chemistry, Faculty of Pharmacy, UGR-UEQ
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
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26
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Ghidinelli S, Abbate S, Koshoubu J, Araki Y, Wada T, Longhi G. Solvent Effects and Aggregation Phenomena Studied by Vibrational Optical Activity and Molecular Dynamics: The Case of Pantolactone. J Phys Chem B 2020; 124:4512-4526. [PMID: 32396357 PMCID: PMC8007093 DOI: 10.1021/acs.jpcb.0c01483] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Raman and Raman optical activity (ROA), IR, and vibrational circular dichroism (VCD) spectra of (R)- and (S)-pantolactone have been recorded in three solvents. ROA has been employed on water and DMSO solutions, VCD on DMSO and CCl4 solutions. In the last solvent, monomer-dimer equilibrium is present. Due to the low conformational flexibility of the isolated molecule and to the possibility of aggregation, this compound has been used here to test different protocols for computation of the spectroscopic responses taking into account solvent effects. Molecular dynamics (MD) simulations have been carried out together with statistical clustering methods based on collective variables to extract the structures needed to calculate the spectra. Quantum mechanical DFT calculations based on PCM are compared with approaches based on different representations of the solvent shell (MM or QM level). Appropriate treatment of the solvent permits obtaining of good band-shapes, with the added advantage that the MD analysis allows one to take into account flexibility of dimeric structures justifying the broadness of observed bands and the absence of intense VCD couplets in the carbonyl and OH stretching regions.
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Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, Via Branze 45, 25123 Brescia, Italy
| | - Jun Koshoubu
- JASCO Corporation, 2967-5 Ishikawa-machi, Hachioji, Tokyo 192-8537, Japan
| | - Yasuyuki Araki
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Takehiko Wada
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy.,Istituto Nazionale di Ottica (INO), CNR, Research Unit of Brescia, c/o CSMT, Via Branze 45, 25123 Brescia, Italy
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27
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Mazzeo G, Santoro E, Abbate S, Zonta C, Fabris F, Longhi G. Testing the vibrational exciton and the local mode models on the instructive cases of dicarvone, dipinocarvone, and dimenthol vibrational circular dichroism spectra. Chirality 2020; 32:907-921. [DOI: 10.1002/chir.23232] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/11/2020] [Accepted: 04/06/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
| | - Ernesto Santoro
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
- Research Unit of BresciaIstituto Nazionale di Ottica (INO), CNR Brescia Italy
| | - Cristiano Zonta
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padova Padova Italy
| | - Fabrizio Fabris
- Dipartimento di Scienze Molecolari e NanosistemiUniversità Ca' Foscari Venezia Mestre Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità di Brescia Brescia Italy
- Research Unit of BresciaIstituto Nazionale di Ottica (INO), CNR Brescia Italy
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28
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Ghidinelli S, Abbate S, Mazzeo G, Paoloni L, Viola E, Ercolani C, Donzello MP, Longhi G. Characterization of tetrakis(thiadiazole)porphyrazine metal complexes by magnetic circular dichroism and magnetic circularly polarized luminescence. Chirality 2020; 32:808-816. [PMID: 32189418 DOI: 10.1002/chir.23221] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 02/11/2020] [Accepted: 03/03/2020] [Indexed: 12/21/2022]
Abstract
The magnetic circular dichroism (MCD) spectra of metal complexes of tetrakis(thiadiazole)porphyrazines ([TTDPzM] with M = 2HI , ZnII , MgII (H2 O), and CdII ) have been recorded in dimethyl formamide solution. Together with the UV-Vis spectra, the MCD spectra provide useful information about the structure and electronic properties of the complexes. The experimental UV-Vis and MCD spectra compare pretty well with DFT calculations of two sorts, based either on the sum-over-states (SOS) approach or on the complex polarization propagator approach. They further corroborate the findings and interpretation of MCD spectra of porphyrazines based on the model of Michl for peripheral molecular orbitals. Magnetic circularly polarized luminescence (MCPL) spectra, quite uncommon in the literature, have been recorded for [TTDPzM] (M = 2HI , ZnII , MgII (H2 O)).
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Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy.,Unit of Brescia, Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | | | - Elisa Viola
- Dipartimento di Chimica, Università di Roma Sapienza, Rome, Italy
| | - Claudio Ercolani
- Dipartimento di Chimica, Università di Roma Sapienza, Rome, Italy
| | | | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy.,Unit of Brescia, Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT, Brescia, Italy
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29
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Paoloni L, Mazzeo G, Longhi G, Abbate S, Fusè M, Bloino J, Barone V. Toward Fully Unsupervised Anharmonic Computations Complementing Experiment for Robust and Reliable Assignment and Interpretation of IR and VCD Spectra from Mid-IR to NIR: The Case of 2,3-Butanediol and trans-1,2-Cyclohexanediol. J Phys Chem A 2020; 124:1011-1024. [PMID: 31922423 PMCID: PMC7993639 DOI: 10.1021/acs.jpca.9b11025] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
![]()
The infrared (IR)
and vibrational circular dichroism (VCD) spectra
of 2,3-butanediol and trans-1,2-cyclohexanediol from
900 to 7500 cm–1 (including mid-IR, fundamental
CH and OH stretchings, and near-infrared regions) have been investigated
by a combined experimental and computational strategy. The computational
approach is rooted in density functional theory (DFT) computations
of harmonic and leading anharmonic mechanical, electrical, and magnetic
contributions, followed by a generalized second-order perturbative
(GVPT2) evaluation of frequencies and intensities for all the above
regions without introducing any ad hoc scaling factor. After proper
characterization of large-amplitude motions, all resonances plaguing
frequencies and intensities are taken into proper account. Comparison
of experimental and simulated spectra allows unbiased assignment and
interpretation of the most interesting features. The reliability of
the GVPT2 approach for OH stretching fundamentals and overtones is
confirmed by the remarkable agreement with a local mode model purposely
tailored for the latter two regions. Together with the specific interest
of the studied molecules, our results confirm that an unbiased assignment
and interpretation of vibrational spectra for flexible medium-size
molecules can be achieved by means of a nearly unsupervised reliable,
robust, and user-friendly DFT/GVPT2 model.
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Affiliation(s)
- Lorenzo Paoloni
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy.,Consiglio Nazionale delle Ricerche-I.N.O. , c/o CSMT via Branze, 45 , 25123 Brescia , Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy.,Consiglio Nazionale delle Ricerche-I.N.O. , c/o CSMT via Branze, 45 , 25123 Brescia , Italy
| | - Marco Fusè
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Julien Bloino
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Vincenzo Barone
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
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30
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Fusè M, Mazzeo G, Longhi G, Abbate S, Masi M, Evidente A, Puzzarini C, Barone V. Unbiased Determination of Absolute Configurations by vis-à-vis Comparison of Experimental and Simulated Spectra: The Challenging Case of Diplopyrone. J Phys Chem B 2019; 123:9230-9237. [PMID: 31580674 DOI: 10.1021/acs.jpcb.9b08375] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A new experimental-computational strategy for the determination of the absolute configuration (AC) of complex chiral molecules is proposed by combining diverse experimental spectroscopies with quantum-mechanical simulations well beyond the current computational practice. Key features are the conformer search and relative stability evaluation performed by a new stochastic two-level tool followed by a vis-à-vis comparison of experimental and computed spectra without any ad hoc adjustment. The entire computational procedure is embedded in the user-friendly VMS software, and its reliability is granted by the inclusion of mechanic/electric/magnetic anharmonicity as well as ro-vibrational and vibronic couplings by means of generalized perturbation theory in conjunction with double-hybrid functionals combined with empirical dispersion contributions and suitable basis sets. To test and validate the new approach, the puzzling case of diplopyrone, a fungal phytotoxic metabolite, has been chosen: the close match between new experimental and simulated infrared absorption and vibrational circular dichroism spectra has led to the unbiased evaluation of its AC.
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Affiliation(s)
- Marco Fusè
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy.,Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT , via Branze, 45 - 25123 Brescia , Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy.,Consiglio Nazionale delle Ricerche-I.N.O. c/o CSMT , via Branze, 45 - 25123 Brescia , Italy
| | - Marco Masi
- Dipartimento di Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician" , Università di Bologna , Via Selmi 2 , I-40126 Bologna , Italy
| | - Vincenzo Barone
- Scuola Normale Superiore , Piazza dei Cavalieri 7 , I-56126 Pisa , Italy
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31
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Bam R, Yang W, Longhi G, Abbate S, Lucotti A, Tommasini M, Franzini R, Villani C, Catalano VJ, Olmstead MM, Chalifoux WA. Four-Fold Alkyne Benzannulation: Synthesis, Properties, and Structure of Pyreno[a]pyrene-Based Helicene Hybrids. Org Lett 2019; 21:8652-8656. [DOI: 10.1021/acs.orglett.9b03273] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Radha Bam
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Wenlong Yang
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Andrea Lucotti
- Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Matteo Tommasini
- Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Roberta Franzini
- Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Universitá di Roma “La Sapienza”, 00185 Roma, Italy
| | - Claudio Villani
- Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Universitá di Roma “La Sapienza”, 00185 Roma, Italy
| | - Vincent J. Catalano
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Marilyn M. Olmstead
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Wesley A. Chalifoux
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
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32
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Resa S, Reiné P, Álvarez de Cienfuegos L, Guisán-Ceinos S, Ribagorda M, Longhi G, Mazzeo G, Abbate S, Mota AJ, Miguel D, Cuerva JM. Optically active Ag(i): o-OPE helicates using a single homochiral sulfoxide as chiral inducer. Org Biomol Chem 2019; 17:8425-8434. [PMID: 31469142 DOI: 10.1039/c9ob01573f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we describe the ability of a simple enantiopure sulfoxide group to promote folding of oligo ortho-phenylene ethynylenes (o-OPEs) with one helical sense. A family of foldamers with up to seven triple bonds was synthesized and fully characterized. Moreover, changes in structure and chiroptical properties caused by Ag(i) coordination have been studied by NMR, UV, VCD and ECD measurements. Quantum mechanical DFT calculations support experimental results.
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Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Pablo Reiné
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - María Ribagorda
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Antonio J Mota
- Department of Inorganic Chemistry, UEQ, University of Granada, C.U. Fuentenueva, Granada, Spain
| | - Delia Miguel
- Department of Physical Chemistry, UEQ, University of Granada, C.U. Cartuja, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
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33
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Reine P, Campaña AG, Alvarez de Cienfuegos L, Blanco V, Abbate S, Mota AJ, Longhi G, Miguel D, Cuerva JM. Chiral double stapled o-OPEs with intense circularly polarized luminescence. Chem Commun (Camb) 2019; 55:10685-10688. [PMID: 31432053 DOI: 10.1039/c9cc04885e] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Intrinsically chiral double stapled ortho-oligo phenylene ethynylenes (o-OPEs) 1 show glum values up to 5.5 × 10-2, the second highest value ever observed for a simple organic molecule (SOM). DFT calculations of molecular spectra and properties encompassing electric and magnetic dipole transition moments account for these observations.
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Affiliation(s)
- Pablo Reine
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Araceli G Campaña
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Luis Alvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Victor Blanco
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy. and Istituto Nazionale di Ottica - CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Science, UGR-UEQ, Granada, Spain
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy. and Istituto Nazionale di Ottica - CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Delia Miguel
- Department of Physical Chemistry, Faculty of Pharmacy, UGR-UEQ, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
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34
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Ghidinelli S, Longhi G, Abbate S, Boiadjiev SE, Lightner DA. Bilirubin and its congeners: conformational analysis and chirality from metadynamics and related computational methods. Monatsh Chem 2019. [DOI: 10.1007/s00706-019-02411-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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35
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Arnaboldi S, Benincori T, Penoni A, Vaghi L, Cirilli R, Abbate S, Longhi G, Mazzeo G, Grecchi S, Panigati M, Mussini PR. Highly enantioselective "inherently chiral" electroactive materials based on a 2,2'-biindole atropisomeric scaffold. Chem Sci 2019; 10:2708-2717. [PMID: 30996988 PMCID: PMC6419939 DOI: 10.1039/c8sc04862b] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/28/2018] [Indexed: 01/14/2023] Open
Abstract
Chiral oligothiophene monomers with C 2 symmetry, based on 3,3'-bithiophene atropisomeric cores with high racemization barriers, have recently been shown to provide excellent chiral starting materials with high electroactivity for the easy preparation of enantiopure electroactive films endowed with powerful chirality manifestations. We now introduce an inherently chiral monomer based on a 2,2'-biindole core, as the prototype of a new inherently chiral monomer family, whose properties could be modulable through functionalization of the pyrrolic N atoms. By fast, regular electrooligomerization the new monomer yields inherently chiral films with high, reversible electroactivity and, above all, impressive enantioselectivity towards very different chiral probes, some of pharmaceutical interest, as general-scope electrode surfaces. Such results, while opening the way to a new, attractive inherently chiral selector class, nicely confirm the general validity of the inherent chirality strategy for chiral electrochemistry. Furthermore, the enantioselectivity of the new selectors not only holds with electroactive chiral probes, but also with circularly polarized light components as well as electron spins, resulting in good chiroptical and spin filter performances, which suggests fascinating correlations between the three contexts.
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Affiliation(s)
- Serena Arnaboldi
- Dipartimento di Chimica , Università degli Studi di Milano , Via Golgi, 19 , 20133 Milano , Italy .
| | - Tiziana Benincori
- Dipartimento di Scienza e Alta Tecnologia , Università degli Studi dell'Insubria , Via Valleggio 11 , 22100 Como , Italy .
| | - Andrea Penoni
- Dipartimento di Scienza e Alta Tecnologia , Università degli Studi dell'Insubria , Via Valleggio 11 , 22100 Como , Italy .
| | - Luca Vaghi
- Dipartimento di Scienze dei Materiali , Università di Milano-Bicocca , Via R. Cozzi 55 , 20125 Milano , Italy
| | - Roberto Cirilli
- Istituto Superiore di Sanità , Centro Nazionale per il Controllo e la Valutazione dei Farmaci , Viale Regina Elena 299 , 00161 Roma , Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale , Università degli Studi di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale , Università degli Studi di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale , Università degli Studi di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Sara Grecchi
- Dipartimento di Chimica , Università degli Studi di Milano , Via Golgi, 19 , 20133 Milano , Italy .
| | - Monica Panigati
- Dipartimento di Chimica , Università degli Studi di Milano , Via Golgi, 19 , 20133 Milano , Italy .
- Istituto per lo Studio delle Macromolecole, Consiglio Nazionale delle Ricerche (ISMAC-CNR) , Via E. Bassini, 15 , 20133 Milano , Italy
| | - Patrizia Romana Mussini
- Dipartimento di Chimica , Università degli Studi di Milano , Via Golgi, 19 , 20133 Milano , Italy .
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36
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Mazzeo G, Longhi G, Abbate S, Mangiavacchi F, Santi C, Han J, Soloshonok VA, Melensi L, Ruzziconi R. Mannich-type addition of 1,3-dicarbonyl compounds to chiral tert-butanesulfinyltrifluoroacetaldimines. Mechanistic aspects and chiroptical studies. Org Biomol Chem 2019; 16:8742-8750. [PMID: 30393798 DOI: 10.1039/c8ob02204f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Mannich-type addition of 1,3-dicarbonyl compounds to (SS)-N-tert-butanesulfinyltrifluoroacetaldimine has been carried out under dramatically different conditions. The stereochemical outcome was quite different when the reaction was carried out under solvent-free conditions, at high temperature and without any catalyst or additive, compared with the DBU catalyzed reaction in dichloromethane solution at low temperature. Mechanistic aspects of the reaction under both the conditions are discussed. In this respect, vibrational (VCD) and electronic circular dichroism (ECD) and optical rotatory dispersion (ORD) experiments proved to be valuable tools for determining the absolute configurations of the reaction products.
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Affiliation(s)
- Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
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37
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Patti A, Pedotti S, Mazzeo G, Longhi G, Abbate S, Paoloni L, Bloino J, Rampino S, Barone V. Ferrocenes with simple chiral substituents: an in-depth theoretical and experimental VCD and ECD study. Phys Chem Chem Phys 2019; 21:9419-9432. [DOI: 10.1039/c9cp00437h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Ferrocenes bearing chiral pendants are investigated through VCD and ECD. The VCD spectra are best interpreted by GVPT2-anharmonic DFT calculations. Diagnostic bands related to the absolute configuration of the title compounds are found in both kinds of spectra.
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Affiliation(s)
- Angela Patti
- Institute of Biomolecular Chemistry – CNR
- 95126 Catania
- Italy
| | - Sonia Pedotti
- Institute of Biomolecular Chemistry – CNR
- 95126 Catania
- Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT)
- Università di Brescia
- 25123 Brescia
- Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT)
- Università di Brescia
- 25123 Brescia
- Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT)
- Università di Brescia
- 25123 Brescia
- Italy
| | | | - Julien Bloino
- Scuola Normale Superiore
- I-56126 Pisa
- Italy
- Consiglio Nazionale delle Ricerche
- Istituto di Chimica dei Composti OrganoMetallici (CNR-ICCOM) Area della Ricerca CNR
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38
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Abbate S, Longhi G, Mazzeo G, Villani C, Petković S, Ruzziconi R. CF3: an overlooked chromophore in VCD spectra. A review of recent applications in structural determination. RSC Adv 2019; 9:11781-11796. [PMID: 35517012 PMCID: PMC9063343 DOI: 10.1039/c9ra01358j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 04/03/2019] [Indexed: 12/03/2022] Open
Abstract
The VCD spectra of several chiral compounds containing the CF3 group are reviewed and analyzed. The list of compounds contains pharmaceutically relevant molecules as well as simple model molecules, having the value of case studies. In particular we point out the importance of the sign of the VCD band relative to some stretching normal mode of CF3 in the region 1110–1150 cm−1, as diagnostic of the configuration of stereogenic carbons C* to which the CF3 group is bound: the correspondence (−) ↔ (R) and (+) ↔ (S) holds for 100% of 1-aryl-2,2,2-trifluoroethanols. DFT calculations confirm these conclusions, but for the rule established here they serve just as a check. This rule is tested on two new compounds, namely N-tert-butanesulfinyl-1-(quinoline-4-yl)-2,2,2-trifluoroethylamine, 8, and 4-[2-(2,2,2-trifluoro-1-hydroxyethyl)pyrrolidin-1-yl]-2-(trifluoromethyl)benzonitrile, 10, both containing two stereogenic elements, one of them being an asymmetric carbon C* of unknown configuration binding a CF3 group. Discussion of the general validity of the rule is provided and some further tests are run on compounds in well-established drugs. VCD allows one to investigate the configuration of stereogenic centers bearing a CF3-group and to define its interactions with nearby chemical groups.![]()
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Affiliation(s)
- Sergio Abbate
- DMMT (Dipartimento di Medicina Molecolare e Traslazionale)
- Università di Brescia
- 25123 Brescia
- Italy
| | - Giovanna Longhi
- DMMT (Dipartimento di Medicina Molecolare e Traslazionale)
- Università di Brescia
- 25123 Brescia
- Italy
| | - Giuseppe Mazzeo
- DMMT (Dipartimento di Medicina Molecolare e Traslazionale)
- Università di Brescia
- 25123 Brescia
- Italy
| | - Claudio Villani
- Dipartimento di Chimica e Tecnologie del Farmaco
- Università di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Silvija Petković
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - Renzo Ruzziconi
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
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39
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Ghidinelli S, Abbate S, Boiadjiev SE, Lightner DA, Longhi G. l-Stercobilin-HCl and d-Urobilin-HCl. Analysis of Their Chiroptical and Conformational Properties by VCD, ECD, and CPL Experiments and MD and DFT Calculations. J Phys Chem B 2018; 122:12351-12362. [DOI: 10.1021/acs.jpcb.8b07954] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Stefan E. Boiadjiev
- Department of Chemistry and Biochemistry, Medical University-Pleven, 1 St. Kl. Ohridski Str., 5800 Pleven, Bulgaria
| | - David A. Lightner
- Department of Chemistry, University of Nevada, Reno, 1664 North Virginia Street, Reno, 89557-0020 Nevada, United States
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
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40
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Domínguez Z, López-Rodríguez R, Álvarez E, Abbate S, Longhi G, Pischel U, Ros A. Azabora[5]helicene Charge-Transfer Dyes Show Efficient and Spectrally Variable Circularly Polarized Luminescence. Chemistry 2018; 24:12660-12668. [DOI: 10.1002/chem.201801908] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Zoe Domínguez
- CIQSO-Centre for Research in Sustainable Chemistry and Department of Chemistry; University of Huelva; Campus de El Carmen s/n E-21071 Huelva Spain
| | - Rocío López-Rodríguez
- Institute for Chemical Research (CSIC-US); C/Américo Vespucio 49 E-41092 Seville Spain
- Department of Organic Chemistry and Innovation Centre in Advanced Chemistry (ORFEO-CINQA); University of Seville; C/Prof. García González 1 E-41012 Seville Spain
| | - Eleuterio Álvarez
- Institute for Chemical Research (CSIC-US); C/Américo Vespucio 49 E-41092 Seville Spain
| | - Sergio Abbate
- Department of Molecular and Translational Medicine; University of Brescia; Viale Europa 11 25123 Brescia Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine; University of Brescia; Viale Europa 11 25123 Brescia Italy
| | - Uwe Pischel
- CIQSO-Centre for Research in Sustainable Chemistry and Department of Chemistry; University of Huelva; Campus de El Carmen s/n E-21071 Huelva Spain
| | - Abel Ros
- Institute for Chemical Research (CSIC-US); C/Américo Vespucio 49 E-41092 Seville Spain
- Department of Organic Chemistry and Innovation Centre in Advanced Chemistry (ORFEO-CINQA); University of Seville; C/Prof. García González 1 E-41012 Seville Spain
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41
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Benincori T, Appoloni G, Mussini PR, Arnaboldi S, Cirilli R, Quartapelle Procopio E, Panigati M, Abbate S, Mazzeo G, Longhi G. Searching for Models Exhibiting High Circularly Polarized Luminescence: Electroactive Inherently Chiral Oligothiophenes. Chemistry 2018; 24:11082-11093. [DOI: 10.1002/chem.201801158] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Tiziana Benincori
- Dipartimento di Scienza e Alta Tecnologia; Università degli Studi dell'Insubria; via Valleggio 11 22100 Como Italy
| | - Giulio Appoloni
- Dipartimento di Scienza e Alta Tecnologia; Università degli Studi dell'Insubria; via Valleggio 11 22100 Como Italy
| | - Patricia Romana Mussini
- Dipartimento di Chimica and C.I.Ma.I.NA; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
| | - Serena Arnaboldi
- Dipartimento di Chimica and C.I.Ma.I.NA; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
| | - Roberto Cirilli
- Centro nazionale per il controllo e la valutazione dei farmaci; Istituto Superiore di Sanità; Viale Regina Elena 299 00161 Roma Italy
| | - Elsa Quartapelle Procopio
- Dipartimento di Chimica and C.I.Ma.I.NA; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
| | - Monica Panigati
- Dipartimento di Chimica and C.I.Ma.I.NA; Università degli Studi di Milano; via Golgi 19 20133 Milano Italy
- Istituto per lo Studio delle Macromolecole; Consiglio Nazionale delle Ricerche (ISMAC-CNR); Via E. Bassini 15 20133 Milano Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; viale Europa 11 25123 Brescia Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; viale Europa 11 25123 Brescia Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale; Università degli Studi di Brescia; viale Europa 11 25123 Brescia Italy
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42
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Cerezo J, Aranda D, Avila Ferrer FJ, Prampolini G, Mazzeo G, Longhi G, Abbate S, Santoro F. Toward a general mixed quantum/classical method for the calculation of the vibronic ECD of a flexible dye molecule with different stable conformers: Revisiting the case of 2,2,2-trifluoro-anthrylethanol. Chirality 2018; 30:730-743. [DOI: 10.1002/chir.22853] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Javier Cerezo
- Departamento de Química Física; Universidad de Murcia; Murcia Spain
| | - Daniel Aranda
- Consiglio Nazionale delle Ricerche-Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Pisa Italy
- Departamento de Química Física; Universidad de Málaga; Málaga Spain
| | | | - Giacomo Prampolini
- Consiglio Nazionale delle Ricerche-Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Pisa Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale; Università di Brescia; Brescia Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale; Università di Brescia; Brescia Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale; Università di Brescia; Brescia Italy
| | - Fabrizio Santoro
- Consiglio Nazionale delle Ricerche-Istituto di Chimica dei Composti Organometallici (ICCOM-CNR); Pisa Italy
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43
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Reiné P, Justicia J, Morcillo SP, Abbate S, Vaz B, Ribagorda M, Orte Á, Álvarez de Cienfuegos L, Longhi G, Campaña AG, Miguel D, Cuerva JM. Pyrene-Containing ortho-Oligo(phenylene)ethynylene Foldamer as a Ratiometric Probe Based on Circularly Polarized Luminescence. J Org Chem 2018; 83:4455-4463. [PMID: 29577727 PMCID: PMC6145600 DOI: 10.1021/acs.joc.8b00162] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
In
this manuscript, we report the first synthesis of an organic
monomolecular emitter, which behaves as a circularly polarized luminescence
(CPL)-based ratiometric probe. The enantiopure helical ortho-oligo(phenylene)ethynylene (o-OPE) core has been
prepared by a new and efficient macrocyclization reaction. The combination
of such o-OPE helical skeleton and a pyrene couple
leads to two different CPL emission features in a single structure
whose ratio linearly responds to silver(I) concentration.
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Affiliation(s)
- Pablo Reiné
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Jose Justicia
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Sara P Morcillo
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale , Universitá di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Belen Vaz
- Department of Organic Chemistry, Biomedical Research Center (CINBIO), and Southern Galicia Institute of Health Research (IISSG) , Universidade de Vigo , 36310 Vigo , Spain
| | - María Ribagorda
- Department of Organic Chemistry , Universidad Autónoma de Madrid , Ciudad Universitaria de Cantoblanco , 28049 Madrid , Spain
| | - Ángel Orte
- Department of Physical Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale , Universitá di Brescia , Viale Europa 11 , 25123 Brescia , Italy
| | - Araceli G Campaña
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Delia Miguel
- Department of Physical Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
| | - Juan M Cuerva
- Department of Organic Chemistry , University of Granada , Avenida de la Fuente Nueva , 18071 Granada , Spain
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44
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Miceli M, Mazziotta A, Palumbo C, Roma E, Tosi E, Longhi G, Abbate S, Lupattelli P, Mazzeo G, Gasperi T. Asymmetric Synthesis of Spirooxindoles via Nucleophilic Epoxidation Promoted by Bifunctional Organocatalysts. Molecules 2018; 23:molecules23020438. [PMID: 29462935 PMCID: PMC6017607 DOI: 10.3390/molecules23020438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 02/12/2018] [Accepted: 02/12/2018] [Indexed: 11/16/2022] Open
Abstract
Taking into account the postulated reaction mechanism for the organocatalytic epoxidation of electron-poor olefins developed by our laboratory, we have investigated the key factors able to positively influence the H-bond network installed inside the substrate/catalyst/oxidizing agent. With this aim, we have: (i) tested a few catalysts displaying various effects that noticeably differ in terms of steric hindrance and electron demand; (ii) employed α-alkylidene oxindoles decorated with different substituents on the aromatic ring (11a-g), the exocylic double bond (11h-l), and the amide moiety (11m-v). The observed results suggest that the modification of the electron-withdrawing group (EWG) weakly conditions the overall outcomes, and conversely a strong influence is unambiguously ascribable to either the N-protected or N-unprotected lactam framework. Specifically, when the NH free substrates (11m-u) are employed, an inversion of the stereochemical control is observed, while the introduction of a Boc protecting group affords the desired product 12v in excellent enantioselectivity (97:3 er).
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Affiliation(s)
- Martina Miceli
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
| | - Andrea Mazziotta
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
| | - Chiara Palumbo
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
| | - Elia Roma
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
| | - Eleonora Tosi
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, viale Europa 11, 25123 Brescia, Italy.
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, viale Europa 11, 25123 Brescia, Italy.
| | - Paolo Lupattelli
- Dipartimento di Scienze, Università degli Studi della Basilicata, via dell'Ateneo Lucano 10, I-85100 Potenza, Italy.
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale (DMMT), Università di Brescia, viale Europa 11, 25123 Brescia, Italy.
| | - Tecla Gasperi
- Dipartimento di Scienze- Sezione di Nanoscienze e Nanotecnologie, Università degli Studi di Roma Tre, V.le G. Marconi 446, I-00146 Rome, Italy.
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Resa S, Miguel D, Guisán-Ceinos S, Mazzeo G, Choquesillo-Lazarte D, Abbate S, Crovetto L, Cárdenas DJ, Carreño MC, Ribagorda M, Longhi G, Mota AJ, Álvarez de Cienfuegos L, Cuerva JM. Sulfoxide-Induced Homochiral Folding of ortho
-Phenylene Ethynylenes (o
-OPEs) by Silver(I) Templating: Structure and Chiroptical Properties. Chemistry 2018; 24:2653-2662. [DOI: 10.1002/chem.201704897] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | - Delia Miguel
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giuseppe Mazzeo
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos; Instituto Andaluz de Ciencias de la Tierra, CSIC-UGR; Armilla, Granada Spain
| | - Sergio Abbate
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Luis Crovetto
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - María Ribagorda
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giovanna Longhi
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Antonio J. Mota
- Department of Inorganic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
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Abbate S, Bertucci C, Di Bari L, Pescitelli G, Berova N, Caldwell J. Special Issue "Chiroptical Spectroscopy: Instrumentation, Experimental Aspects and Applications" in memory of Ettore Castiglioni. Chirality 2018; 30:226. [PMID: 29334404 DOI: 10.1002/chir.22809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 12/05/2017] [Indexed: 11/08/2022]
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Reiné P, Ortuño AM, Resa S, Álvarez de Cienfuegos L, Blanco V, Ruedas-Rama MJ, Mazzeo G, Abbate S, Lucotti A, Tommasini M, Guisán-Ceinos S, Ribagorda M, Campaña AG, Mota A, Longhi G, Miguel D, Cuerva JM. OFF/ON switching of circularly polarized luminescence by oxophilic interaction of homochiral sulfoxide-containing o-OPEs with metal cations. Chem Commun (Camb) 2018; 54:13985-13988. [DOI: 10.1039/c8cc08395a] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
CPL switches with high glum and Φ are described.
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48
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Ghidinelli S, Longhi G, Mazzeo G, Abbate S, Boiadjiev SE, Lightner DA. Cover Image, Volume 30, Issue 1. Chirality 2017. [DOI: 10.1002/chir.22802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Carmo dos Santos NA, Badetti E, Licini G, Abbate S, Longhi G, Zonta C. A stereodynamic fluorescent probe for amino acids. Circular dichroism and circularly polarized luminescence analysis. Chirality 2017; 30:65-73. [DOI: 10.1002/chir.22780] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 01/09/2023]
Affiliation(s)
| | - Elena Badetti
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
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50
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Ghidinelli S, Longhi G, Mazzeo G, Abbate S, Boiadjiev SE, Lightner DA. On the aggregation of bilirubinoids in solution as evidenced by VCD and ECD spectroscopy and DFT calculations. Chirality 2017; 30:19-28. [PMID: 29083054 DOI: 10.1002/chir.22776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/20/2017] [Accepted: 10/01/2017] [Indexed: 11/11/2022]
Abstract
Vibrational and electronic circular dichroism (VCD and ECD) spectra of 3 optically active bilirubin analogs with propionic acid groups replaced by (1) 1-(S)-methylpropyl groups, (2) 3-acetoxy-1-(S)-methylpropyl groups, and (3) 1-(S)-2-(R)-dimethyl-2-(methoxycarbonyl)ethyl groups have been recorded at different concentrations in chloroform. The aliphatic chains attached to C-8 and C-12 of the 3 chosen mesobilirubins were modified so as to possess no OH group. The variation of the VCD spectra with concentration is consistent with the formation of dimers at high concentration. Density functional theory and time-dependent density functional theory calculations on monomeric and dimeric forms support such a conclusion. Comparing with previous VCD (ECD) and IR (UV) studies of other mesobilirubin molecules, it is concluded that here, the key feature for aggregation is the missing OH groups on the propionic acid chains. The latter, in synergy with the polar groups of lactam moieties, appear to be involved in intramolecular phenomena and thus favor monomeric forms. Investigation of ECD and UV spectra of the same compounds in mixed DMSO/chloroform solutions provide further clues to the proposed picture.
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Affiliation(s)
- Simone Ghidinelli
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Brescia, Italy
| | - Stefan E Boiadjiev
- Department of Chemistry and Biochemistry, Medical University-Pleven, Pleven, Bulgaria
| | - David A Lightner
- Department of Chemistry, University of Nevada, Reno, Nevada, USA
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