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Wu T, Kapitán J, Bouř P. Resolving Resonant Electronic States in Chiral Metal Complexes by Raman Optical Activity Spectroscopy. J Phys Chem Lett 2022; 13:3873-3877. [PMID: 35467874 DOI: 10.1021/acs.jpclett.2c00653] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chiral metal complexes exhibit rich photophysical properties and are important for applications ranging from biosensing to photocatalysis. We present a combined experimental and computational approach leading to information about energies and transition moments of excited electronic states, documented on two chiral metal complexes. The experimental protocol for measurement of the resonance Raman optical activity comprises multiple techniques, i.e., absorption, circular dichroism, and polarized and differential Raman scattering. An accurate formula for subtraction of the interfering circular dichroism/polarized Raman scattering effect is given. An analysis of the spectra based on density functional theory calculations unveils the geometric and electronic structures of the molecules. Such insight into molecular electronic states of chromophores may be useful for understanding and tuning photochemical properties of metal-containing complexes, biomolecules, and supramolecules.
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Affiliation(s)
- Tao Wu
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague, Czech Republic
| | - Josef Kapitán
- Department of Optics, Palacký University Olomouc, 17 Listopadu 12, 77146 Olomouc, Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, 16610 Prague, Czech Republic
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2
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Zając G, Bouř P. Measurement and Theory of Resonance Raman Optical Activity for Gases, Liquids, and Aggregates. What It Tells about Molecules. J Phys Chem B 2021; 126:355-367. [PMID: 34792364 DOI: 10.1021/acs.jpcb.1c08370] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Resonance Raman Optical Activity (RROA) appeared as a natural extension of the nonresonance branch. It combines the structural sensitivity of chiroptical spectroscopy with the signal enhancement coming from the resonance of molecular electronic transitions with the excitation laser light. However, the idea has been hampered by many technical and theoretical problems that are being clarified only in recent years. We provide the theoretical basis and several examples documenting the problems, achievements, and potential of RROA, in particular in biomolecular studies.
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Affiliation(s)
- Grzegorz Zając
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, Krakow 30-348, Poland
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Flemingovo náměstí 2, Prague, 16610, Czech Republic
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Krupová M, Kessler J, Bouř P. Recent Trends in Chiroptical Spectroscopy: Theory and Applications of Vibrational Circular Dichroism and Raman Optical Activity. Chempluschem 2020; 85:561-575. [DOI: 10.1002/cplu.202000014] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/18/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Monika Krupová
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
- Faculty of Mathematics and PhysicsCharles University Ke Karlovu 3 12116 Prague 2 Czech Republic
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
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4
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Mattiat J, Luber S. Vibrational (resonance) Raman optical activity with real time time dependent density functional theory. J Chem Phys 2019; 151:234110. [DOI: 10.1063/1.5132294] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- Johann Mattiat
- Department of Chemistry, University of Zurich, Zurich, Switzerland
| | - Sandra Luber
- Department of Chemistry, University of Zurich, Zurich, Switzerland
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Kim S, Kim DH, Park SG. Highly sensitive and on-site NO2 SERS sensors operated under ambient conditions. Analyst 2018; 143:3006-3010. [DOI: 10.1039/c8an00845k] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper presents the first demonstration of highly sensitive and on-site SERS-based NO2 sensors with a detection limit of 0.1 ppm operated under ambient conditions.
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Affiliation(s)
- Sunho Kim
- Advanced Nano-Surface Department (ANSD)
- Korea Institute of Materials Science (KIMS)
- Changwon
- Republic of Korea
| | - Dong-Ho Kim
- Advanced Nano-Surface Department (ANSD)
- Korea Institute of Materials Science (KIMS)
- Changwon
- Republic of Korea
| | - Sung-Gyu Park
- Advanced Nano-Surface Department (ANSD)
- Korea Institute of Materials Science (KIMS)
- Changwon
- Republic of Korea
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6
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Luber S. Localized molecular orbitals for calculation and analysis of vibrational Raman optical activity. Phys Chem Chem Phys 2018; 20:28751-28758. [DOI: 10.1039/c8cp05880f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
First calculations of vibrational Raman optical activity based on localized molecular orbitals are presented, which pave the way for novel insight into spectroscopic signatures of chiral systems.
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Affiliation(s)
- Sandra Luber
- Department of Chemistry
- University of Zurich
- Zurich
- Switzerland
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Luber S. Raman Optical Activity Spectra from Density Functional Perturbation Theory and Density-Functional-Theory-Based Molecular Dynamics. J Chem Theory Comput 2017; 13:1254-1262. [DOI: 10.1021/acs.jctc.6b00820] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra Luber
- Department of Chemistry C, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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Šebestík J, Teplý F, Císařová I, Vávra J, Koval D, Bouř P. Intense chirality induction in nitrile solvents by a helquat dye monitored by near resonance Raman scattering. Chem Commun (Camb) 2016; 52:6257-60. [PMID: 27087537 DOI: 10.1039/c6cc01606e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chirality induction phenomena attract attention because of their relevance to intermolecular interactions encountered in living matter. Usually, such effects are weak. However, enantiomers of a [6]helquat dye were found to induce exceptionally strong chirality in several achiral solvents containing nitrile groups. This effect was observable as an intense Raman optical activity (ROA) induced in acetonitrile, acetonitrile-d3, and liquid hydrogen cyanide solvents. The observation was verified by measurement of both helquat enantiomers which provided mirror image ROA spectra. Theoretical analysis indicated that the 532 nm laser excitation light was in a near resonance with electronic transitions of the dye, which made the effect observable in very dilute solutions (1 : 200 000 helquat to nitrile ratio) and thus the phenomenon can be generally useful in analytical chemistry.
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Affiliation(s)
- Jaroslav Šebestík
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic.
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Šebestík J, Kapitán J, Pačes O, Bouř P. Diamagnetic Raman Optical Activity of Chlorine, Bromine, and Iodine Gases. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jaroslav Šebestík
- Biomolecular Spectroscopy; Institute of Organic Chemistry and Biochemistry; Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Josef Kapitán
- Department of Optics; Palacký University; 17. listopadu 12 77146 Olomouc Czech Republic
| | - Ondřej Pačes
- Biomolecular Spectroscopy; Institute of Organic Chemistry and Biochemistry; Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Petr Bouř
- Biomolecular Spectroscopy; Institute of Organic Chemistry and Biochemistry; Flemingovo náměstí 2 16610 Prague Czech Republic
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Šebestík J, Kapitán J, Pačes O, Bouř P. Diamagnetic Raman Optical Activity of Chlorine, Bromine, and Iodine Gases. Angew Chem Int Ed Engl 2016; 55:3504-8. [PMID: 26845382 DOI: 10.1002/anie.201600058] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Indexed: 01/23/2023]
Abstract
Magnetic Raman optical activity of gases provides unique information about their electric and magnetic properties. Magnetic Raman optical activity has recently been observed in a paramagnetic gas (Angew. Chem. Int. Ed. 2012, 51, 11058; Angew. Chem. 2012, 124, 11220). In diamagnetic molecules, it has been considered too weak to be measurable. However, in chlorine, bromine and iodine vapors, we could detect a significant signal as well. Zeeman splitting of electronic ground-state energy levels cannot rationalize the observed circular intensity difference (CID) values of about 10(-4). These are explicable by participation of paramagnetic excited electronic states. Then a simple model including one electronic excited state provides reasonable spectral intensities. The results suggest that this kind of scattering by diamagnetic molecules is a general event observable under resonance conditions. The phenomenon sheds new light on the role of excited states in the Raman scattering, and may be used to probe molecular geometry and electronic structure.
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Affiliation(s)
- Jaroslav Šebestík
- Biomolecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Josef Kapitán
- Department of Optics, Palacký University, 17. listopadu 12, 77146, Olomouc, Czech Republic
| | - Ondřej Pačes
- Biomolecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Petr Bouř
- Biomolecular Spectroscopy, Institute of Organic Chemistry and Biochemistry, Flemingovo náměstí 2, 16610, Prague, Czech Republic.
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Melcrová A, Kessler J, Bouř P, Kaminský J. Simulation of Raman optical activity of multi-component monosaccharide samples. Phys Chem Chem Phys 2016; 18:2130-42. [DOI: 10.1039/c5cp04111b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Determination of the saccharide structure in solution is a laborious process that can be significantly enhanced by chiral optical spectroscopies.
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Affiliation(s)
- Adéla Melcrová
- Institute of Organic Chemistry and Biochemistry
- 166 10 Prague
- Czech Republic
- J. Heyrovský Institute of Physical Chemistry
- 182 23 Prague
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry
- 166 10 Prague
- Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry
- 166 10 Prague
- Czech Republic
| | - Jakub Kaminský
- Institute of Organic Chemistry and Biochemistry
- 166 10 Prague
- Czech Republic
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12
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Wu T, Kessler J, Bouř P. Chiral sensing of amino acids and proteins chelating with EuIII complexes by Raman optical activity spectroscopy. Phys Chem Chem Phys 2016; 18:23803-11. [DOI: 10.1039/c6cp03968e] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiroptical spectroscopy of lanthanides sensitively reflects their environment and finds various applications including probing protein structures.
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Affiliation(s)
- Tao Wu
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences
- 16610 Prague 6
- Czech Republic
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences
- 16610 Prague 6
- Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences
- 16610 Prague 6
- Czech Republic
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13
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Abstract
Methyl benzoate is studied as a model compound for the development of new IR pulse schemes with possible applicability to biomolecules.
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14
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Parchaňský V, Kapitán J, Bouř P. Inspecting chiral molecules by Raman optical activity spectroscopy. RSC Adv 2014. [DOI: 10.1039/c4ra10416a] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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