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Pál D, Besnard C, de Aguirre A, Poblador-Bahamonde AI, Pescitelli G, Lacour J. 2,4,5,7-Tetranitrofluorenone Oximate for the Naked-Eye Detection of H-Bond Donors and the Chiroptical Sensing of Enantiopure Reagents. Chemistry 2023; 29:e202302169. [PMID: 37529861 DOI: 10.1002/chem.202302169] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/01/2023] [Accepted: 08/02/2023] [Indexed: 08/03/2023]
Abstract
Hydrogen bonding greatly influences rates and equilibrium positions of chemical reactions, conformations, and sometimes even stereochemistry. This study reports on tetranitrofluorenone oximate, a novel dye capable of naked-eye detection of hydrogen-bond donating species (HBDs) and of rapid determination of H-bond donation strength by hypsochromic shift monitoring. In addition, the molecule possesses atropisomeric conformations, of M and P configuration, as evidenced in solid and solution state studies by X-ray diffraction and electronic circular dichroism (ECD), respectively. In the latter case, enantiopure bis-thioureas were the most effective HBDs to promote a chiral induction (diastereoselective recognition, Pfeiffer effect); the ECD results being rationalized by time-dependent density functional theory (TDDFT) calculations. Based on these experiments, bis-thioureas were used as chiral reagents in asymmetric 1,3-dipolar cycloadditions of structurally-related nitrones; the ECD sensing of the stereoinduction between bis-thioureas and the oximate serving as an indirect method of selection of the most effective HBD for asymmetric synthesis.
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Affiliation(s)
- Dávid Pál
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratory of Crystallography, University of Geneva, Quai Ernest Ansermet Genève, 24, 1211, Geneva 4, Switzerland
| | - Adiran de Aguirre
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | | | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, University of Pisa, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
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Anselmo S, Sancataldo G, Mørck Nielsen H, Foderà V, Vetri V. Peptide-Membrane Interactions Monitored by Fluorescence Lifetime Imaging: A Study Case of Transportan 10. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13148-13159. [PMID: 34714654 PMCID: PMC8582253 DOI: 10.1021/acs.langmuir.1c02392] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/19/2021] [Indexed: 06/13/2023]
Abstract
The interest on detailed analysis of peptide-membrane interactions is of great interest in both fundamental and applied sciences as these may relate to both functional and pathogenic events. Such interactions are highly dynamic and spatially heterogeneous, making the investigation of the associated phenomena highly complex. The specific properties of membranes and peptide structural details, together with environmental conditions, may determine different events at the membrane interface, which will drive the fate of the peptide-membrane system. Here, we use an experimental approach based on the combination of spectroscopy and fluorescence microscopy methods to characterize the interactions of the multifunctional amphiphilic peptide transportan 10 with model membranes. Our approach, based on the use of suitable fluorescence reporters, exploits the advantages of phasor plot analysis of fluorescence lifetime imaging microscopy measurements to highlight the molecular details of occurring membrane alterations in terms of rigidity and hydration. Simultaneously, it allows following dynamic events in real time without sample manipulation distinguishing, with high spatial resolution, whether the peptide is adsorbed to or inserted in the membrane.
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Affiliation(s)
- Sara Anselmo
- Dipartimento
di Fisica e Chimica−Emilio Segré, Università degli Studi di Palermo, Viale delle Scienze ed. 18 90128, Palermo, Italy
| | - Giuseppe Sancataldo
- Dipartimento
di Fisica e Chimica−Emilio Segré, Università degli Studi di Palermo, Viale delle Scienze ed. 18 90128, Palermo, Italy
| | - Hanne Mørck Nielsen
- Department
of Pharmacy, University of Copenhagen, Universitetsparken 2 2100, Copenhagen, Denmark
| | - Vito Foderà
- Department
of Pharmacy, University of Copenhagen, Universitetsparken 2 2100, Copenhagen, Denmark
| | - Valeria Vetri
- Dipartimento
di Fisica e Chimica−Emilio Segré, Università degli Studi di Palermo, Viale delle Scienze ed. 18 90128, Palermo, Italy
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Sergeeva TY, Mukhitova RK, Nizameev IR, Kadirov MK, Klypina PD, Ziganshina AY, Konovalov AI. Closed polymer containers based on phenylboronic esters of resorcinarenes. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1594-1601. [PMID: 29977693 PMCID: PMC6009270 DOI: 10.3762/bjnano.9.151] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
Novel polymer nanospheres (p(SRA-B)) were prepared by cross-linking a sulfonated resorcinarene (SRA) with phenylboronic acid. p(SRA-B) shows good stability in water and can be used as a nanocontainer for the pH- and glucose-controlled substrate release. Fluorescent dyes (fluorescein, pyrene and 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt) were successfully loaded into p(SRA-B). The release of dye is achieved by lowering the pH value to 3 or by adding glucose.
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Affiliation(s)
- Tatiana Yu Sergeeva
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
| | - Rezeda K Mukhitova
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
| | - Irek R Nizameev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
- Kazan National Research Technical University, K. Marx str. 10, Kazan 420111, Russia
| | - Marsil K Kadirov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
| | - Polina D Klypina
- A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya str. 18, Kazan 420008, Russia
| | - Albina Y Ziganshina
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
- A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya str. 18, Kazan 420008, Russia
| | - Alexander I Konovalov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russia
- A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya str. 18, Kazan 420008, Russia
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Siljanovska Petreska G, Salsamendi M, Arzac A, Leal GP, Alegret N, Blazevska Gilev J, Tomovska R. Covalent-Bonded Reduced Graphene Oxide-Fluorescein Complex as a Substrate for Extrinsic SERS Measurements. ACS OMEGA 2017; 2:4123-4131. [PMID: 31457712 PMCID: PMC6641878 DOI: 10.1021/acsomega.7b00184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/26/2017] [Indexed: 06/10/2023]
Abstract
When graphene is used as SERS substrates, it contributes to the chemical mechanism (CM) of enhancement of Raman signal, owing to which the detection limit is very low (lower than mM content of probe molecules). The CM of enhancement depends largely on the interactions between the substrate and the probe molecules. Therefore, in this work, we have investigated the possibility of increasing the SERS activity of graphene by improving the interaction between the probe molecule and the graphene substrate by establishing exclusively strong covalent bonding between them. Fluorescein (Fl) was selected as a probe molecule because it is one of the most commonly used fluorophore in bioscience. As a graphene substrate, reduced graphene oxide (rGO) platelets were used. In addition, silver nanoparticles (AgNPs) were added onto the hybrids to further increase the enhancement by electromagnetic mechanism. Highly enhanced Raman signal of Fl onto neat rGO was achieved for micromolar concentration of the probe molecules. This was attributed to the covalent bonding between them, which introduced hole doping to rGO, decreasing the Fermi level of rGO and bringing it more closely to the LUMO of Fl. This induces aligning of their energy levels, resulting in higher contribution of the nonresonance effect to the charge transfer mechanism of enhancement, which, in this case, occurred intramolecularly. When AgNPs were added onto the rGO substrate, the expected enhancement performance was not observed. On the one hand, this was attributed to small size (∼20 nm) of AgNPs and lack of aggregates and, on the other, due to the unusually high contribution of CM determined.
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Affiliation(s)
- Gordana Siljanovska Petreska
- POLYMAT
and Departamento de Química Aplicada, Facultad de Ciencias
Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia—San
Sebastian, Spain
| | - Maitane Salsamendi
- POLYMAT
and Departamento de Química Aplicada, Facultad de Ciencias
Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia—San
Sebastian, Spain
| | - Alejandro Arzac
- POLYMAT
and Departamento de Química Aplicada, Facultad de Ciencias
Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia—San
Sebastian, Spain
| | - Gracia Patricia Leal
- POLYMAT
and Departamento de Química Aplicada, Facultad de Ciencias
Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia—San
Sebastian, Spain
| | - Núria Alegret
- CIC
biomaGUNE, Carbon Nanobiotechnology Group, Miramon Pasealekua 182, 20009 Donostia—San Sebastián, Gipuzkoa, Spain
| | - Jadranka Blazevska Gilev
- Faculty
of Technology and Metallurgy, University
of Saints Cyril and Methodius, Rudjer Boskovic 16, 1000 Skopje, R. Macedonia
| | - Radmila Tomovska
- POLYMAT
and Departamento de Química Aplicada, Facultad de Ciencias
Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia—San
Sebastian, Spain
- IKERBASQUE,
Basque Foundation for Science, 48011 Bilbao, Spain
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