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Keşan G, Özcan E, Chábera P, Polívka T, Fuciman M. Time-Resolved Spectroelectrochemical Dynamics of Carotenoid 8'-apo-β-Carotenal. Chempluschem 2023; 88:e202300404. [PMID: 37747302 DOI: 10.1002/cplu.202300404] [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: 07/31/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 09/26/2023]
Abstract
This work examines the influence of applied external voltage in bulk electrolysis on the excited-state properties of 8'-apo-β-carotenal in acetonitrile by steady-state and ultrafast time-resolved absorption spectroscopy. The data collected under bulk electrolysis were compared with those taken without applied voltage. The steady-state measurements showed that although intensity of the S0 -S2 absorption band varies with the applied voltage, the spectral position remain nearly constant. Comparison of transient absorption spectra shows that the magnitude of the ICT-like band decreases during the experiment under applied voltage condition, and is associated with a prolongation of the S1 /ICT-like lifetime from 8 ps to 13 ps. Furthermore, switching off the applied voltage resulted in returning to no-voltage data within about 30 min. Our results show that the amplitude of the signal associated with the ICT state can be tuned by applying an external voltage.
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Affiliation(s)
- Gürkan Keşan
- Department of Physics, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1760, 370 05 České, Budějovice, Czech Republic
| | - Emrah Özcan
- Department of Physics, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1760, 370 05 České, Budějovice, Czech Republic
- Department of Chemistry, Faculty of Science, Gebze Technical University, 41400, Gebze, Kocaeli, Turkey
| | - Pavel Chábera
- Pavel Chábera, Division of Chemical Physics, Department of Chemistry, Lund University, Box 142, 221 00, Lund, Sweden
| | - Tomáš Polívka
- Department of Physics, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1760, 370 05 České, Budějovice, Czech Republic
| | - Marcel Fuciman
- Department of Physics, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 1760, 370 05 České, Budějovice, Czech Republic
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2
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Yukihira N, Uragami C, Horiuchi K, Kosumi D, Gardiner AT, Cogdell RJ, Hashimoto H. Intramolecular charge-transfer enhances energy transfer efficiency in carotenoid-reconstituted light-harvesting 1 complex of purple photosynthetic bacteria. Commun Chem 2022; 5:135. [PMID: 36697849 PMCID: PMC9814923 DOI: 10.1038/s42004-022-00749-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 10/04/2022] [Indexed: 01/28/2023] Open
Abstract
In bacterial photosynthesis, the excitation energy transfer (EET) from carotenoids to bacteriochlorophyll a has a significant impact on the overall efficiency of the primary photosynthetic process. This efficiency can be enhanced when the involved carotenoid has intramolecular charge-transfer (ICT) character, as found in light-harvesting systems of marine alga and diatoms. Here, we provide insights into the significance of ICT excited states following the incorporation of a higher plant carotenoid, β-apo-8'-carotenal, into the carotenoidless light-harvesting 1 (LH1) complex of the purple photosynthetic bacterium Rhodospirillum rubrum strain G9+. β-apo-8'-carotenal generates the ICT excited state in the reconstituted LH1 complex, achieving an efficiency of EET of up to 79%, which exceeds that found in the wild-type LH1 complex.
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Affiliation(s)
- Nao Yukihira
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo, 669-1330, Japan
| | - Chiasa Uragami
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo, 669-1330, Japan
| | - Kota Horiuchi
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo, 669-1330, Japan
| | - Daisuke Kosumi
- Institute of Industrial Nanomaterials, Kumamoto University, 2-39-1 Kurokami, Chuou-ku, Kumamoto, 860-8555, Japan
| | - Alastair T Gardiner
- Laboratory of Anoxygenic Phototrophs, Institute of Microbiology, Czech Academy of Sciences, 379 81, Třeboň, Czech Republic
| | - Richard J Cogdell
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Hideki Hashimoto
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo, 669-1330, Japan.
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3
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Capobianco A, Di Donato M, Caruso T, Centore R, Lapini A, Manfredi C, Velardo A, Volino S, Peluso A. Phototautomerism of triazolo-triazole scaffold. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Ryan MD, Pearson RM, Miyake GM. Organocatalyzed Controlled Radical Polymerizations. ORGANIC CATALYSIS FOR POLYMERISATION 2018. [DOI: 10.1039/9781788015738-00584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Radical polymerizations are responsible for a significant amount of the World's total polymer production. Free-radical polymerization provides a relatively inexpensive and facile route to produce bulk plastic products, however, it fails in the synthesis of precisely defined macromolecules. To address this issue, controlled radical polymerizations have been developed, which utilize a reversible deactivation mechanism for the synthesis of advanced polymeric architectures. In this chapter, we discuss the mechanisms and applications of organocatalyzed controlled radical polymerizations, specifically atom transfer radical polymerization, photo mediated reversible addition fragmentation chain-transfer polymerization, and reversible complexation mediated radical polymerization, as powerful new methods for precision polymer synthesis.
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Affiliation(s)
- Matthew D. Ryan
- Department of Chemistry, Colorado State University Fort Collins Colorado 80523 USA
| | - Ryan M. Pearson
- Department of Chemistry, Colorado State University Fort Collins Colorado 80523 USA
| | - Garret M. Miyake
- Department of Chemistry, Colorado State University Fort Collins Colorado 80523 USA
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5
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Taffet EJ, Scholes GD. Peridinin Torsional Distortion and Bond-Length Alternation Introduce Intramolecular Charge-Transfer and Correlated Triplet Pair Intermediate Excited States. J Phys Chem B 2018; 122:5835-5844. [DOI: 10.1021/acs.jpcb.8b02504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Elliot J. Taffet
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Gregory D. Scholes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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6
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Castellucci E, Monini M, Bessi M, Iagatti A, Bussotti L, Sinicropi A, Calamante M, Zani L, Basosi R, Reginato G, Mordini A, Foggi P, Di Donato M. Photoinduced excitation and charge transfer processes of organic dyes with siloxane anchoring groups: a combined spectroscopic and computational study. Phys Chem Chem Phys 2018; 19:15310-15323. [PMID: 28569917 DOI: 10.1039/c7cp01956d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dye-sensitized solar cells (DSSCs) have attracted significant interest in the last few years as effective low-cost devices for solar energy conversion. We have analyzed the excited state dynamics of several organic dyes bearing both cyanoacrylic acid and siloxane anchoring groups. The spectroscopic properties of the dyes have been studied both in solution and when adsorbed on a TiO2 film using stationary and time-resolved techniques, probing the sub-picosecond to nanosecond time interval. The comparison between the spectra registered in solution and on the solid substrate evidences different pathways for energy and electron relaxation. The transient spectra of the TiO2-adsorbed dyes show the appearance of a long wavelength excited state absorption band, attributed to the cationic dye species, which is absent in the spectra measured in solution. Furthermore, the kinetic traces of the samples adsorbed on the TiO2 film show a long decay component not present in solution which constitutes indirect evidence of electron transfer between the dye and the semiconductor. The interpretation of the experimental results has been supported by theoretical DFT calculations of the excited state energies and by the analysis of molecular orbitals of the analyzed dye molecules.
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Affiliation(s)
- Elena Castellucci
- LENS (European Laboratory for Non-Linear Spectroscopy), Via N. Carrara 1, 50019 Sesto Fiorentino, Italy
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7
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Lerch MM, Medved′ M, Lapini A, Laurent AD, Iagatti A, Bussotti L, Szymański W, Buma WJ, Foggi P, Di Donato M, Feringa BL. Tailoring Photoisomerization Pathways in Donor–Acceptor Stenhouse Adducts: The Role of the Hydroxy Group. J Phys Chem A 2018; 122:955-964. [DOI: 10.1021/acs.jpca.7b10255] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael M. Lerch
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Miroslav Medved′
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacký University in Olomouc, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
- Department
of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK-97400 Banská Bystrica, Slovak Republic
| | - Andrea Lapini
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Adèle D. Laurent
- CEISAM, UMR CNRS 6230, BP 92208, 2 Rue de la Houssinière, 44322 Nantes, Cedex 3, France
| | - Alessandro Iagatti
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Laura Bussotti
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
| | - Wiktor Szymański
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
- Department
of Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Wybren Jan Buma
- Van’t
Hoff Institute for Molecular Sciences, University of Amsterdam, Science
Park 904, 1098 XH Amsterdam, The Netherlands
| | - Paolo Foggi
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica, Università di Perugia, via Elce di Sotto 8, 06100 Perugia, Italy
| | - Mariangela Di Donato
- LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Ben L. Feringa
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
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8
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Oliver TAA. Recent advances in multidimensional ultrafast spectroscopy. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171425. [PMID: 29410844 PMCID: PMC5792921 DOI: 10.1098/rsos.171425] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/20/2017] [Indexed: 05/14/2023]
Abstract
Multidimensional ultrafast spectroscopies are one of the premier tools to investigate condensed phase dynamics of biological, chemical and functional nanomaterial systems. As they reach maturity, the variety of frequency domains that can be explored has vastly increased, with experimental techniques capable of correlating excitation and emission frequencies from the terahertz through to the ultraviolet. Some of the most recent innovations also include extreme cross-peak spectroscopies that directly correlate the dynamics of electronic and vibrational states. This review article summarizes the key technological advances that have permitted these recent advances, and the insights gained from new multidimensional spectroscopic probes.
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Affiliation(s)
- Thomas A. A. Oliver
- School of Chemistry, Cantock's Close, University of Bristol, Bristol BS8 1TS, UK
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9
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Scholz M, Flender O, Lenzer T, Oum K. Ultrafast Excited-State Dynamics of all-trans-Capsanthin in Organic Solvents. J Phys Chem A 2017; 121:8380-8388. [DOI: 10.1021/acs.jpca.7b08252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mirko Scholz
- Physikalische Chemie, Universität Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Oliver Flender
- Physikalische Chemie, Universität Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Thomas Lenzer
- Physikalische Chemie, Universität Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
| | - Kawon Oum
- Physikalische Chemie, Universität Siegen, Adolf-Reichwein-Str. 2, 57076 Siegen, Germany
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10
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Ryan MD, Theriot JC, Lim CH, Yang H, Lockwood A, Garrison NG, Lincoln SR, Musgrave CB, Miyake GM. Solvent Effects on the Intramolecular Charge Transfer Character of N, N-Diaryl Dihydrophenazine Catalysts for Organocatalyzed Atom Transfer Radical Polymerization. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY 2017; 55:3017-3027. [PMID: 28966439 PMCID: PMC5614505 DOI: 10.1002/pola.28574] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The nature of intramolecular charge transfer of N,N-diaryl dihydrophenazine photocatalysts (PCs) in different solvents is explored in context of their performance in organocatalyzed atom transfer radical polymerization (O-ATRP). PCs having a computationally predicted lowest energy excited state exhibiting charge transfer (CT) character can operate a highly controlled O-ATRP in a wide range of solvent polarities, from non-polar hexanes to highly polar N,N-dimethylacetamide. For PCs having a computationally predicted lowest energy excited state not possessing CT character, their ability to operate a controlled O-ATRP is decreased. This study confirms the importance of CT character in the excited state for N,N-diaryl dihydrophenazine PCs, and a deeper understanding of the activity of CT PCs has enabled the synthesis of polymers of low dispersity ( < 1.10) in a controlled fashion.
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Affiliation(s)
- Matthew D. Ryan
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Jordan C. Theriot
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Chern-Hooi Lim
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Haishen Yang
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Andrew Lockwood
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Nathaniel G. Garrison
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Sarah R. Lincoln
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Charles B. Musgrave
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Garret M. Miyake
- Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Materials Science and Engineering Program, University of Colorado Boulder, Boulder, Colorado 80309, United States
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11
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Kuznetsova V, Chábera P, Litvín R, Polívka T, Fuciman M. Effect of Isomerization on Excited-State Dynamics of Carotenoid Fucoxanthin. J Phys Chem B 2017; 121:4438-4447. [DOI: 10.1021/acs.jpcb.7b02526] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Valentyna Kuznetsova
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
| | - Pavel Chábera
- Division
of Chemical Physics, Lund University, P.O. Box 124, Lund SE-22100, Sweden
| | - Radek Litvín
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
- Institute
of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Tomáš Polívka
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
- Institute
of Plant Molecular Biology, Biological Centre, Czech Academy of Sciences, 37005 České Budějovice, Czech Republic
| | - Marcel Fuciman
- Institute
of Physics and Biophysics, Faculty of Science, University of South Bohemia, Branišovská 1760, 37005 České Budějovice, Czech Republic
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12
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DFT and PCM-TD-DFT investigation of the electronic structures and spectra of 5-(3-phenyl-2-propenylidene)-2-thioxo-4-thiazolidinone derivatives. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Otsuka M, Mori Y, Takano K. Theoretical study on photophysical properties of 3′-hydroxyechinenone and the effects of interactions with orange carotenoid protein. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.01.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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14
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Han F, Zhang R, Zhang Z, Su J, Ni Z. A new TICT and AIE-active tetraphenylethene-based Schiff base with reversible piezofluorochromism. RSC Adv 2016. [DOI: 10.1039/c6ra14729a] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A new tetraphenylethene-based Schiff base N-5-nitrosalicylidene-4-tetraphenylethenylamine (NSTPE) exhibits an interesting “on–off–on” optical switching property and reversible piezofluorochromic properties.
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Affiliation(s)
- Fangfang Han
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Ran Zhang
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | | | - Jianguo Su
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
| | - Zhonghai Ni
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou 221116
- P. R. China
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15
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Oliver TAA, Fleming GR. Following Coupled Electronic-Nuclear Motion through Conical Intersections in the Ultrafast Relaxation of β-Apo-8′-carotenal. J Phys Chem B 2015; 119:11428-41. [DOI: 10.1021/acs.jpcb.5b04893] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Thomas A. A. Oliver
- Physical
Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Graham R. Fleming
- Physical
Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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16
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Di Donato M, Ragnoni E, Lapini A, Foggi P, Hiller RG, Righini R. Femtosecond transient infrared and stimulated Raman spectroscopy shed light on the relaxation mechanisms of photo-excited peridinin. J Chem Phys 2015; 142:212409. [DOI: 10.1063/1.4915072] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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17
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Di Donato M, Ragnoni E, Lapini A, Kardaś TM, Ratajska-Gadomska B, Foggi P, Righini R. Identification of the Excited-State C═C and C═O Modes of trans-β-Apo-8'-carotenal with Transient 2D-IR-EXSY and Femtosecond Stimulated Raman Spectroscopy. J Phys Chem Lett 2015; 6:1592-1598. [PMID: 26263319 DOI: 10.1021/acs.jpclett.5b00528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Assigning the vibrational modes of molecules in the electronic excited state is often a difficult task. Here we show that combining two nonlinear spectroscopic techniques, transient 2D exchange infrared spectroscopy (T2D-IR-EXSY) and femtosecond stimulated Raman spectroscopy (FSRS), the contribution of the C═C and C═O modes in the excited-state vibrational spectra of trans-β-apo-8'-carotenal can be unambiguously identified. The experimental results reported in this work confirm a previously proposed assignment based on quantum-chemical calculations and further strengthen the role of an excited state with charge-transfer character in the relaxation pathway of carbonyl carotenoids. On a more general ground, our results highlight the potentiality of nonlinear spectroscopic methods based on the combined use of visible and infrared pulses to correlate structural and electronic changes in photoexcited molecules.
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Affiliation(s)
- Mariangela Di Donato
- †LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- ‡INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- §Dipartimento di Chimica "Ugo Schiff", Università di Firenze, via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Elena Ragnoni
- †LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- ‡INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
| | - Andrea Lapini
- †LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- ‡INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- §Dipartimento di Chimica "Ugo Schiff", Università di Firenze, via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Tomasz M Kardaś
- ∥Department of Chemistry, University of Warsaw, Zwirki Wigury 101, 02-089 Warsaw, Poland
| | | | - Paolo Foggi
- †LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- ‡INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- ⊥Dipartimento di Chimica, Università di Perugia, via Elce di Sotto 8, 06100 Perugia, Italy
| | - Roberto Righini
- †LENS (European Laboratory for Non Linear Spectroscopy), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- ‡INO (Istituto Nazionale di Ottica), Largo Fermi 6, 50125 Firenze, Italy
- §Dipartimento di Chimica "Ugo Schiff", Università di Firenze, via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
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