1
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Penasa R, Pandey AK, Wurst K, Rancan M, Armelao L, Licini G, Zonta C. Ion-Pairing Stereodynamic Probes for Circular Dichroism Chiral Sensing of Amines. Inorg Chem 2024. [PMID: 39250823 DOI: 10.1021/acs.inorgchem.4c02531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2024]
Abstract
Tris(2-pyridylmethyl)amine (TPMA) and tris(2-phenolmethyl)amine (TPA) metal complexes have been extensively used for catalysis and molecular recognition applications. In particular, due to their ability to form stereodynamic complexes through the helical arrangement of the ligand around the metal in a propeller shape, chiroptical sensing has been extensively investigated. In particular, the capability of the analyte, usually a Lewis base, to bind the metal complex has been the predominant recognition motif. Herein, we report the synthesis and application of a zinc TPA-based stereodynamic probe for the sensing of chiral amines and amino-alcohols in which an ion-pair interaction between the anionic metal complexes and the ammonium ions is responsible for the recognition.
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Affiliation(s)
- Roberto Penasa
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Anjani Kumar Pandey
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Klaus Wurst
- Department of General, Inorganic and Theoretical Chemistry, University of Innsbruck, A6020 Innsbruck, Austria
| | - Marzio Rancan
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE) National Research Council (CNR) c/o Department of Chemical Sciences (DiSC) University of Padova, Via F. Marzolo 1, 35131 Padova, Italy
| | - Lidia Armelao
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- Department of Chemical Sciences and Materials Technologies (DSCTM), National Research Council (CNR), Piazzale A. Moro 7, 00185 Roma, Italy
| | - Giulia Licini
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
| | - Cristiano Zonta
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
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2
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Formen JSSK, Howard JR, Anslyn EV, Wolf C. Circular Dichroism Sensing: Strategies and Applications. Angew Chem Int Ed Engl 2024; 63:e202400767. [PMID: 38421186 DOI: 10.1002/anie.202400767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 03/02/2024]
Abstract
The analysis of the absolute configuration, enantiomeric composition, and concentration of chiral compounds are frequently encountered tasks across the chemical and health sciences. Chiroptical sensing methods can streamline this work and allow high-throughput screening with remarkable reduction of operational time and cost. During the last few years, significant methodological advances with innovative chirality sensing systems, the use of computer-generated calibration curves, machine learning assistance, and chemometric data processing, to name a few, have emerged and are now matched with commercially available multi-well plate CD readers. These developments have reframed the chirality sensing space and provide new opportunities that are of interest to a large group of chemists. This review will discuss chirality sensing strategies and applications with representative small-molecule CD sensors. Emphasis will be given to important milestones and recent advances that accelerate chiral compound analysis by outperforming traditional methods, conquer new directions, and pioneering efforts that lie at the forefront of chiroptical high-throughput screening developments. The goal is to provide the reader with a thorough understanding of the current state and a perspective of future directions of this rapidly emerging field.
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Affiliation(s)
| | - James R Howard
- Chemistry Department, University of Texas at Austin, Austin TX, USA
| | - Eric V Anslyn
- Chemistry Department, University of Texas at Austin, Austin TX, USA
| | - Christian Wolf
- Chemistry Department, Georgetown University, Washington DC, USA
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3
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Shang W, Wang Y, Zhu X, Liang T, Du C, Xiang J, Liu M. Helical Cage Rotors Switched on by Brake Molecule with Variable Fluorescence and Circularly Polarized Luminescence. J Am Chem Soc 2023; 145:27639-27649. [PMID: 38054305 DOI: 10.1021/jacs.3c09461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
While chiral molecular rotors have unique frames and cavities to possibly generate switchable chiroptical functions, it still remains a formidable challenge to precisely restrict their rotations to activate certain functions such as fluorescence as well as circularly polarized luminescence (CPL), which are strongly related to the local molecular rotations. Herein, we design a pair of enantiopure helical cage rotors, which emit light neither at the molecular state nor in the crystal or aggregation states, although they contain luminophore groups. However, upon mounting with fluoroaromatic borane (TFPB) as a molecular brake, the phenyl rotation of the helical cage can be effectively hindered and fluorescence and CPL activities of the molecular cage are switched on. Crystal structure analysis reveals that the rotation is restricted through synergistic B-O-H-N bonding and a fluoroaromatic-aromatic (ArF-Ar) dipole interaction. Moreover, the helical cages are switched on stepwise with color-variable fluorescence and CPL by the inner brake in the molecular state and the outer brake in the supramolecular assemblies, respectively. This work not only provides the design idea of chiroptical molecular rotors but also unveils how fluorescence and CPL could be generated in cage rotor systems.
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Affiliation(s)
- Weili Shang
- Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences (CAS), ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Yuan Wang
- Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences (CAS), ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Xuefeng Zhu
- Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences (CAS), ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Tongling Liang
- BNLMS, Center for Physicochemical Analysis and Measurement, Institute of Chemistry, CAS, ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Cong Du
- Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences (CAS), ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Junfeng Xiang
- BNLMS, Center for Physicochemical Analysis and Measurement, Institute of Chemistry, CAS, ZhongGuanCun North First Street 2, Beijing 100190, China
| | - Minghua Liu
- Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences (CAS), ZhongGuanCun North First Street 2, Beijing 100190, China
- University of Chinese Academy of Sciences (UCAS), Beijing 100049, China
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4
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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] [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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5
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Gong J, Zhang X. Coordination-based circularly polarized luminescence emitters: Design strategy and application in sensing. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214329] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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6
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Machalska E, Hachlica N, Zajac G, Carraro D, Baranska M, Licini G, Bouř P, Zonta C, Kaczor A. Chiral recognition via a stereodynamic vanadium probe using the electronic circular dichroism effect in differential Raman scattering. Phys Chem Chem Phys 2021; 23:23336-23340. [PMID: 34633399 DOI: 10.1039/d1cp03020e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Intermolecular interactions sensitive to chirality occur in many biological events. We report a complex formation between a versatile vanadium-based probe and a chiral co-ligand monitored via the combination of electronic circular dichroism (ECD) and Raman scattering. This "ECD-Raman" effect was discovered relatively recently and can be measured using a Raman optical activity (ROA) spectrometer. Simulated spectra based on experimental ECD and degree of circularity (DOC) values agree with the observed ones. Sensitive recognition of the chiral enantiopure co-ligand is thus enabled by a combination of resonance of the excitation light with the diastereoisomeric complex, co-ligand complexation, circular dichroism, and polarized Raman scattering from the achiral solvent. Relatively dilute solutions could be detected (10-4 mol dm-3), about 1000× less than is necessary for conventional ROA detection of the pure co-ligand and comparable to concentrations needed for conventional ECD spectroscopy. The results thus show that differential ECD-Raman measurements can be conveniently used to monitor molecular interactions and molecular spectroscopic properties.
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Affiliation(s)
- Ewa Machalska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow 30-387, Poland. .,Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland
| | - Natalia Hachlica
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow 30-387, Poland. .,Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland
| | - Grzegorz Zajac
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland.,Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic.
| | - Davide Carraro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova and CIRCC, Padova Unit, 35131 Padova, Italy.
| | - Malgorzata Baranska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow 30-387, Poland. .,Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova and CIRCC, Padova Unit, 35131 Padova, Italy.
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610, Prague, Czech Republic.
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova and CIRCC, Padova Unit, 35131 Padova, Italy.
| | - Agnieszka Kaczor
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Krakow 30-387, Poland. .,Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland
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7
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Carmo dos Santos NA, Badetti E, Begato F, Wurst K, Licini G, Zonta C. Mixed Multimetallic
tris
(2‐pyridylmethyl)amine Based Complexes: Synthesis and Chiroptical Properties. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Elena Badetti
- Department of Chemical Sciences University of Padova Via F. Marzolo 1 35131 Padova Italy
| | - Federico Begato
- Department of Chemical Sciences University of Padova Via F. Marzolo 1 35131 Padova Italy
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry University of Innsbruck 6020 Innsbruck Austria
| | - Giulia Licini
- Department of Chemical Sciences University of Padova Via F. Marzolo 1 35131 Padova Italy
| | - Cristiano Zonta
- Department of Chemical Sciences University of Padova Via F. Marzolo 1 35131 Padova Italy
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8
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Recognition and Sensing of Chiral Organic Molecules by Chiral Porphyrinoids: A Review. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9080204] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Porphyrinoids are extremely attractive for their electronic, optical, and coordination properties as well as for their versatile substitution at meso/β-positions. All these features allow porphyrinoids to behave as chiroptical hosts for chiral recognition by means of non-covalent interactions towards chiral guests. Over the years, chiral discrimination of chiral molecules such as amino acids, alcohols, amines, hydroxy-carboxylic acids, etc. has aroused the interest of the scientific community. Hence, this review aims to report on the progress to date by illustrating some relevant research regarding the chiral recognition of a multitude of chiral organic guests through several chiral mono- and bis-porphyrins via different spectroscopic techniques.
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9
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“Double-Twist”-Based Dynamic Induction of Optical Activity in Multichromophoric System. Symmetry (Basel) 2021. [DOI: 10.3390/sym13020325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The electronic circular dichroism (CD)-silent 2,5-bis(biphen-2-yl)terephthalaldehyde has been used as a sensor (reporter) of chirality for primary amines. The through-space inductor–reporter interactions force a change in the chromophore conformation toward one of the diastereomeric forms. The structure of the reporter, with the terminal flipping biphenyl groups, led to generating Cotton effects in both lower- and higher-energy regions of the ECD spectrum. The induction of an optical activity in the chromophore was due to the cascade point-to-axial chirality transmission mechanism. The reporter system turned out to be sensitive to the subtle differences in the inductor structure. Despite the size of the chiral substituent, the molecular structure of the inductor–reporter systems in the solid-state showed many similarities. The most important one was the tendency of the core part of the molecules to adapt pseudocentrosymmetric conformation. Supported by a weak dispersion and Van der Waals interactions, the face-to-face and edge-to-face interactions between the π-electron systems present in the molecule were found to be responsible for the molecular arrangement in the crystal.
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10
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Bravin C, Badetti E, Licini G, Zonta C. Tris(2-pyridylmethyl)amines as emerging scaffold in supramolecular chemistry. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213558] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Mądry T, Czapik A, Kwit M. Point-to-Axial Chirality Transmission: A Highly Sensitive Triaryl Chirality Probe for Stereochemical Assignments of Amines. J Org Chem 2020; 85:10413-10431. [PMID: 32806087 PMCID: PMC7458434 DOI: 10.1021/acs.joc.0c00734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Indexed: 01/17/2023]
Abstract
A readily available stereodynamic and the electronic circular dichroism (ECD)-silent 2,5-di(1-naphthyl)-terephthalaldehyde-based probe has been applied for chirality sensing of primary amines. The chiral amine (the inductor) forces a change in the structure of the chromophore system through the point-to-axial chirality transmission mechanism. As a result, efficient induction of optical activity in the chromophoric system is observed. The butterflylike structure of the probe, with the terminal aryl groups acting as changeable "wings", allowed for the generation of exciton Cotton effects in the region of 1Bb electronic transition in the naphthalene chromophores. The sign of the exciton couplets observed for inductor-reporter systems might be correlated with an absolute configuration of the inductor, whereas the linear relationship between amplitudes of the specific Cotton effect and enantiomeric excess of the parent amine gives potentiality for quantitative chirality sensing. Despite the structural simplicity, the probe turned out to be unprecedentedly highly sensitive to even subtle differences in the inductor structure (i.e., O vs CH2).
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Affiliation(s)
- Tomasz Mądry
- Department
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61 614 Poznan, Poland
| | - Agnieszka Czapik
- Department
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61 614 Poznan, Poland
| | - Marcin Kwit
- Department
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61 614 Poznan, Poland
- Center
for Advanced Technologies, Adam Mickiewicz
University, Uniwersytetu
Poznanskiego 10, 61 614 Poznan, Poland
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12
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Badetti E, Lloveras V, Scaramuzzo FA, Wurst K, Veciana J, Vidal-Gancedo J, Licini G, Zonta C. Tris-pyridylmethylamine (TPMA) complexes functionalized with persistent nitronyl nitroxide organic radicals. Dalton Trans 2020; 49:10011-10016. [PMID: 32643714 DOI: 10.1039/d0dt01553a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chance to have persistent organic radicals in combination with metals has attracted much interest since it offers the possibility of having new functional molecules with multiple open-shell elements. In this study, we report the synthesis of two tripodal tris(2-pyridyl)methylamine ligands (TPMA) functionalized with nitronyl nitroxide persistent radicals. The newly formed ligands have been used to coordinate zinc(ii), copper(ii), iron(ii) and cobalt(ii). The resulting complexes have been investigated by means of electron paramagnetic resonance (EPR), ESI-MS, FT-IR spectroscopy and X-ray diffraction. An electron reduction of the N-O radical moiety has been observed, depending on the metal used for the formation of the complex and the reaction conditions. We have observed small differences in the EPR spectra depending on the meta or para position of the radical moiety in the complex structure and some antiferromagnetic interactions between the paramagnetic M(ii) ions and the radical species.
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Affiliation(s)
- Elena Badetti
- Department of Chemical Sciences, University of Padova via Marzolo 1, 35131 Padova, Italy
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13
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Scaramuzzo FA, Badetti E, Licini G, Zonta C. Extending substrate sensing capabilities of zinc tris(2‐pyridylmethyl)amine‐based stereodynamic probe. Chirality 2019; 31:375-383. [DOI: 10.1002/chir.23064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 01/16/2023]
Affiliation(s)
| | - Elena Badetti
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padova Padova Italy
| | - Giulia Licini
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padova Padova Italy
| | - Cristiano Zonta
- Dipartimento di Scienze ChimicheUniversità degli Studi di Padova Padova Italy
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14
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Mądry T, Czapik A, Kwit M. Optical Activity and Helicity Enhancement of Highly Sensitive Dinaphthylmethane-Based Stereodynamic Probes for Secondary Alcohols. ACS OMEGA 2019; 4:3244-3256. [PMID: 31459541 PMCID: PMC6648851 DOI: 10.1021/acsomega.8b03337] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/21/2019] [Indexed: 06/10/2023]
Abstract
Chirality transfer from circular dichroism (CD)-silent secondary alcohol (inductor) to the stereodynamic bichromophoric di(1-naphthyl)methane probe (reporter) led to the generation of intense, induced exciton-type Cotton effects (CEs) in the ultraviolet-visible absorption region. The di(1-naphthyl)methane probe exhibits extraordinarily high sensitivity to even small structural variations of the alcohol skeleton, that is, the probe is able to distinguish between an oxygen atom and a methylene group in a 3-hydroxytetrahydrofurane skeleton. Signs and amplitudes of the exciton couplets of 1Bb electronic transition might be correlated with the type of stereo-differentiating parts of the molecule flanking the stereogenic center, however, not with the absolute configuration. The origin of the induced CEs was established by means of experimental and theoretical methods. As a result, a mechanism of chirality transfer from the permanent stereogenic center to the bichromophore is proposed.
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Affiliation(s)
- Tomasz Mądry
- Department
of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61 614 Poznan, Poland
| | - Agnieszka Czapik
- Department
of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61 614 Poznan, Poland
- Center
for Advanced Technologies, Adam Mickiewicz
University, Umultowska
89C, 61 614 Poznan, Poland
| | - Marcin Kwit
- Department
of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61 614 Poznan, Poland
- Center
for Advanced Technologies, Adam Mickiewicz
University, Umultowska
89C, 61 614 Poznan, Poland
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15
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Jiménez J, Moreno F, Maroto BL, Cabreros TA, Huy AS, Muller G, Bañuelos J, de la Moya S. Modulating ICT emission: a new strategy to manipulate the CPL sign in chiral emitters. Chem Commun (Camb) 2019; 55:1631-1634. [PMID: 30657143 PMCID: PMC7063650 DOI: 10.1039/c8cc09401b] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A new strategy to manipulate the circularly polarized luminescence (CPL) handedness in chiral emitters, based on modulating the population of an emissive ICT state, is proposed. Such a strategy is particularly interesting for conformationally rigid and non-aggregating chiral organic emitters, opening up new perspectives for the development of CPL applications based on organic molecules.
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Affiliation(s)
- Josué Jiménez
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, Madrid, 28040, Spain.
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16
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Pescitelli G, Lüdeke S, Chamayou AC, Marolt M, Justus V, Górecki M, Arrico L, Di Bari L, Islam MA, Gruber I, Enamullah M, Janiak C. Broad-Range Spectral Analysis for Chiral Metal Coordination Compounds: (Chiro)optical Superspectrum of Cobalt(II) Complexes. Inorg Chem 2018; 57:13397-13408. [PMID: 30339376 DOI: 10.1021/acs.inorgchem.8b01932] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chiroptical broad-range spectral analysis extending from UV to mid-IR was employed to study a family of Co(II) N-(1-(aryl)ethyl)salicylaldiminato Schiff base complexes with pseudotetrahedral geometry associated with chirality-at-metal of the Δ/Λ type. While common chiral organic compounds have well-separated absorption and circular dichroism spectra (CD) in the UV/vis and IR regions, chiral Co(II) complexes feature an almost unique continuum of absorption and CD bands, which cover in sequence the UV, visible, near-IR (NIR), and IR regions of the electromagnetic spectrum. They can be collected in a single (chiro)optical superspectrum ranging from the UV (230 nm, 5.4 eV) to the mid-IR (1000 cm-1, 0.12 eV), which offers a fingerprint of the structure and stereochemistry of the metal complexes. Each region of the superspectrum contributes to one piece of information: the NIR-CD region, in combination with TDDFT calculations, allows a reliable assignment of the metal-centered chirality; the UV-CD region facilitates the analysis of the Δ/Λ diastereomeric equilibrium in solution; and the IR-VCD region contains a combination of low-lying metal-centered electronic states (LLES) and ligand-centered vibrations and displays characteristically enhanced and monosignate VCD bands. Circular dichroism in the NIR and IR regions is crucial to reveal the presence of d-d transitions of the Co(II) core which, due to the electric-dipole forbidden character, would be otherwise overlooked in the corresponding absorption spectra.
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Affiliation(s)
- Gennaro Pescitelli
- Department of Chemistry and Industrial Chemistry , University of Pisa , 56126 Pisa , Italy
| | - Steffen Lüdeke
- Institute of Pharmaceutical Sciences , University of Freiburg , D-79104 Freiburg , Germany
| | | | - Marija Marolt
- Institute of Pharmaceutical Sciences , University of Freiburg , D-79104 Freiburg , Germany
| | - Viktor Justus
- Institute of Pharmaceutical Sciences , University of Freiburg , D-79104 Freiburg , Germany
| | - Marcin Górecki
- Department of Chemistry and Industrial Chemistry , University of Pisa , 56126 Pisa , Italy.,Institute of Organic Chemistry , Polish Academy of Sciences , 01-224 Warsaw , Poland
| | - Lorenzo Arrico
- Department of Chemistry and Industrial Chemistry , University of Pisa , 56126 Pisa , Italy
| | - Lorenzo Di Bari
- Department of Chemistry and Industrial Chemistry , University of Pisa , 56126 Pisa , Italy
| | | | - Irina Gruber
- Institute of Inorganic Chemistry and Structural Chemistry , University of Düsseldorf , D-40225 Düsseldorf , Germany
| | - Mohammed Enamullah
- Department of Chemistry , Jahangirnagar University , Dhaka - 1342 , Bangladesh
| | - Christoph Janiak
- Institute of Inorganic Chemistry and Structural Chemistry , University of Düsseldorf , D-40225 Düsseldorf , Germany
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17
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Badetti E, Carmo Dos Santos NA, Scaramuzzo FA, Bravin C, Wurst K, Licini G, Zonta C. Diasteroselective multi-component assemblies from dynamic covalent imine condensation and metal-coordination chemistry: mechanism and narcissistic stereochemistry self-sorting. RSC Adv 2018; 8:19494-19498. [PMID: 35540993 PMCID: PMC9080712 DOI: 10.1039/c8ra03989e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 05/21/2018] [Indexed: 12/03/2022] Open
Abstract
Self-assembly of a modified tris(2-pyridylmethyl)amine TPMA ligand, zinc(ii) or cobalt(ii) ions, and amino acids have been used effectively as stereo dynamic optical probes for the determination of the enantiomeric excess of free amino acids either using Electronic or Vibrational Circular Dichroism (CD and VCD). Herein, we report the mechanistic and stereochemical study of the self-assembly process which reveals a complex equilibrium in solution where even small variations in the experimental conditions can profoundly affect the final products of the reaction. In particular, variation on the metal stoichiometry switch give rises to an entirely enantio narcissistic self-assembly of the structure.
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Affiliation(s)
- Elena Badetti
- Department of Chemical Sciences, University of Padova, Via Marzolo 1 35131 Padova (PD) Italy
| | | | - Francesca A Scaramuzzo
- Department of Chemical Sciences, University of Padova, Via Marzolo 1 35131 Padova (PD) Italy
| | - Carlo Bravin
- Department of Chemical Sciences, University of Padova, Via Marzolo 1 35131 Padova (PD) Italy
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck Innrain 80/82 6020 Innsbruck Austria
| | - Giulia Licini
- Department of Chemical Sciences, University of Padova, Via Marzolo 1 35131 Padova (PD) Italy
| | - Cristiano Zonta
- Department of Chemical Sciences, University of Padova, Via Marzolo 1 35131 Padova (PD) Italy
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18
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Bravin C, Badetti E, Puttreddy R, Pan F, Rissanen K, Licini G, Zonta C. Binding Profiles of Self-Assembled Supramolecular Cages from ESI-MS Based Methodology. Chemistry 2018; 24:2936-2943. [DOI: 10.1002/chem.201704725] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Carlo Bravin
- Department of Chemical Sciences; University of Padova; via Marzolo 1 35131 Padova (PD) Italy
| | - Elena Badetti
- Department of Chemical Sciences; University of Padova; via Marzolo 1 35131 Padova (PD) Italy
| | - Rakesh Puttreddy
- Nanoscience Center; Department of Chemistry; University of Jyvaskyla; P.O. Box 35 40014 Jyvaskyla Finland
| | - Fangfang Pan
- Nanoscience Center; Department of Chemistry; University of Jyvaskyla; P.O. Box 35 40014 Jyvaskyla Finland
| | - Kari Rissanen
- Nanoscience Center; Department of Chemistry; University of Jyvaskyla; P.O. Box 35 40014 Jyvaskyla Finland
| | - Giulia Licini
- Department of Chemical Sciences; University of Padova; via Marzolo 1 35131 Padova (PD) Italy
| | - Cristiano Zonta
- Department of Chemical Sciences; University of Padova; via Marzolo 1 35131 Padova (PD) Italy
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19
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Carmo dos Santos NA, Natali M, Badetti E, Wurst K, Licini G, Zonta C. Cobalt, nickel, and iron complexes of 8-hydroxyquinoline-di(2-picolyl)amine for light-driven hydrogen evolution. Dalton Trans 2017; 46:16455-16464. [DOI: 10.1039/c7dt02666h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Novel first-row transition metal complexes based on the 8-hydroxyquinoline-di(2-picolyl)amine ligand were prepared and tested as potential HECs in light-driven experiments.
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Affiliation(s)
| | - Mirco Natali
- Department of Chemical and Pharmaceutical Sciences
- University of Ferrara
- and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem)
- sez. di Ferrara
- 44121 Ferrara
| | - Elena Badetti
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Klaus Wurst
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
| | - Giulia Licini
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
| | - Cristiano Zonta
- Department of Chemical Sciences
- University of Padova
- 35131 Padova
- Italy
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