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Kulkarni SG, Jelínková K, Nečas M, Prucková Z, Rouchal M, Dastychová L, Kulhánek P, Vícha R. A Photochemical/Thermal Switch Based on 4,4'-Bis(benzimidazolio)stilbene: Synthesis and Supramolecular Properties. Chemphyschem 2020; 21:2084-2095. [PMID: 32672383 DOI: 10.1002/cphc.202000472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/14/2020] [Indexed: 12/22/2022]
Abstract
Stilbene derivatives are well-recognised substructures of molecular switches based on photochemically and/or thermally induced (E)/(Z) isomerisation. We combined a stilbene motif with two benzimidazolium arms to prepare new sorts of supramolecular building blocks and examined their binding properties towards cucurbit[n]urils (n=7, 8) and cyclodextrins (β-CD, γ-CD) in water. Based on the 1 H NMR data and molecular dynamics simulations, we found that two distinct complexes with different stoichiometry, i. e., guest@β-CD and guest@β-CD2 , coexist in equilibrium in a water solution of the (Z)-stilbene-based guests. We also demonstrated that the bis(benzimidazolio)stilbene guests can be transformed from the (E) into the (Z) form via UV irradiation and back via thermal treatment in DMSO.
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Affiliation(s)
- Shantanu Ganesh Kulkarni
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
| | - Kristýna Jelínková
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
| | - Marek Nečas
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Zdeňka Prucková
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
| | - Michal Rouchal
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
| | - Lenka Dastychová
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
| | - Petr Kulhánek
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Robert Vícha
- Department of Chemistry, Faculty of Technology, Tomas Bata University Zlín, Vavrečkova 275, 760 01, Zlín, Czech Republic
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Rusalov MV, Volchkov VV, Ivanov VL, Melnikov MY, Gostev FE, Shelaev IV, Nadtochenko VA, Vedernikov AI, Gromov SP, Alfimov MV. Femtosecond excited state dynamics of stilbene-viologen complexes with a weakly pronounced charge transfer. Photochem Photobiol Sci 2020; 19:1189-1200. [PMID: 32935702 DOI: 10.1039/d0pp00034e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The femtosecond dynamics of photoinduced electron transfers in supramolecular donor-acceptor complexes between (E)-bis(18-crown-6)stilbene (D) and tetraperchlorates of 2,7-di(2-ammonioethyl)(2,7-diazapyrenium) (A1), 3,3'-(E)-ethene-1,2-diylbis[1-(3-ammoniopropyl)pyridinium] (A2) and 4,4'-ethane-1,2-diylbis[1-(3-ammoniopropyl)pyridinium] (A3) was studied. The acceptors A2 and A3 are weak electron acceptors whose first reduction potentials are equal to -1.0 and -1.2 V (Ag), respectively, while A1 is a strong acceptor with a reduction potential of -0.42 V. It was shown that the back electron transfer time in CT-states of the complexes D·A2 and D·A3 is 30-40 ps, which is approximately 50 times greater than the analogous time for the charge transfer complexes studied earlier. The complex D·A1 is characterized by ultrafast back electron transfer (770 fs). The relaxation pathway of excited states of D·A1 depends on the wavelength of the excitation light. When excited at 356 nm, the accumulation of a transient locally excited (LE) state with a 250 fs lifetime was observed. But when excited at 425 nm, the formation of the LE-state was not observed.
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Affiliation(s)
- Mikhail V Rusalov
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation.
| | - Valery V Volchkov
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation
| | - Vladimir L Ivanov
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation
| | - Mikhail Ya Melnikov
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation
| | - Fedor E Gostev
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygina str. 4, 119991, Moscow, Russian Federation
| | - Ivan V Shelaev
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygina str. 4, 119991, Moscow, Russian Federation
| | - Victor A Nadtochenko
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation.,N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygina str. 4, 119991, Moscow, Russian Federation
| | - Artem I Vedernikov
- Photochemistry Center, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Novatorov str. 7A-1, 119421, Moscow, Russian Federation
| | - Sergey P Gromov
- Chemistry Department, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991, Moscow, Russian Federation.,Photochemistry Center, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Novatorov str. 7A-1, 119421, Moscow, Russian Federation
| | - Michael V Alfimov
- Photochemistry Center, Federal Scientific Research Center "Crystallography and Photonics", Russian Academy of Sciences, Novatorov str. 7A-1, 119421, Moscow, Russian Federation
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Rusalov MV, Volchkov VV, Ivanov VL, Melnikov MY, Gostev FE, Nadtochenko VA, Vedernikov AI, Gromov SP, Alfimov MV. Ultrafast excited state dynamics of a stilbene–viologen charge transfer complex and its interaction with alkanediammonium salts. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Volchkov VV, Khimich MN, Rusalov MV, Gostev FE, Shelaev IV, Nadtochenko VA, Vedernikov AI, Gromov SP, Freidzon AY, Alfimov MV, Melnikov MY. Formation of a supramolecular charge-transfer complex. Ultrafast excited state dynamics and quantum-chemical calculations. Photochem Photobiol Sci 2019; 18:232-241. [DOI: 10.1039/c8pp00328a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The relaxation scheme of the 1·3 singlet state excited by a 25 fs laser pulse was proposed. It includes very fast vibrational relaxation, and direct and back electron transfer resulting in complete fluorescence quenching.
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