1
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O'Neill JS, Kearney L, Brandon MP, Pryce MT. Design components of porphyrin-based photocatalytic hydrogen evolution systems: A review. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214599] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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2
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Dey A, Dana J, Aute S, Das A, Ghosh HN. Hydrogen bond assisted photoinduced intramolecular electron transfer and proton coupled electron transfer in an ultrafast time domain using a ruthenium-anthraquinone dyad. Photochem Photobiol Sci 2019; 18:2430-2441. [DOI: 10.1039/c9pp00135b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PCET kinetics for the formation of charge-separated states was explored by using femtosecond transient absorption spectroscopy. Hydrogen bonding between water and the reduced anthraquinone accounted for thermodynamic and kinetic stabilization.
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Affiliation(s)
- Ananta Dey
- CSIR-Central salt & Marine Chemicals Research Institute
- Bhavnagar 364002
- India
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad – 201002
| | - Jayanta Dana
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400085
- India
| | - Sunil Aute
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad – 201002
- India
- dCSIR National chemical Laboratory
- Pune
| | - Amitava Das
- CSIR-Central salt & Marine Chemicals Research Institute
- Bhavnagar 364002
- India
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad – 201002
| | - Hirendra N. Ghosh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400085
- India
- Institute of Nano Science and Technology
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3
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Kielesiński Ł, Gryko DT, Sobolewski AL, Morawski OW. Effect of conformational flexibility on photophysics of bis-coumarins. Phys Chem Chem Phys 2018; 20:14491-14503. [DOI: 10.1039/c8cp01084f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The fluorescence of bis-coumarins linked via CONH and COO functionalities is strongly dependant on solvent polarity.
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Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
- Institute of Physics
| | - Daniel T. Gryko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | | | - Olaf W. Morawski
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
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4
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Wang T, Sun H, Lu T, Weerasinghe KC, Liu D, Hu W, Zhou X, Wang L, Li W, Liu L. Tuning photophysical properties and electronic energy levels of 1-aminoanthraquinone derivatives by introducing N-ethyl substituent. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.03.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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5
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Bonn AG, Yushchenko O, Vauthey E, Wenger OS. Photoinduced Electron Transfer in an Anthraquinone–[Ru(bpy)3]2+–Oligotriarylamine–[Ru(bpy)3]2+–Anthraquinone Pentad. Inorg Chem 2016; 55:2894-9. [DOI: 10.1021/acs.inorgchem.5b02757] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annabell G. Bonn
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
| | - Oleksandr Yushchenko
- Department of Physical
Chemistry, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Eric Vauthey
- Department of Physical
Chemistry, University of Geneva, 30 quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
| | - Oliver S. Wenger
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel, Switzerland
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6
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Wang X, Brisard G, Fortin D, Karsenti PL, Harvey PD. Push–Pull Porphyrin-Containing Polymers: Materials Exhibiting Ultrafast Near-IR Photophysics. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01607] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xiaorong Wang
- Departement
de chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | - Gessie Brisard
- Departement
de chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | - Daniel Fortin
- Departement
de chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
| | | | - Pierre D. Harvey
- Departement
de chimie, Université de Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
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7
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Theoretical investigation of self-assembled donor–acceptor phthalocyanine complexes and their application in dye-sensitized solar cells. J Mol Graph Model 2015; 59:100-6. [DOI: 10.1016/j.jmgm.2015.04.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 04/01/2015] [Accepted: 04/03/2015] [Indexed: 11/17/2022]
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8
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Yang P, Zhao J, Zhang L, Li L, Zhu Z. Intramolecular Hydrogen Bonds Quench Photoluminescence and Enhance Photocatalytic Activity of Carbon Nanodots. Chemistry 2015; 21:8561-8. [DOI: 10.1002/chem.201405088] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Indexed: 11/08/2022]
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9
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Photoinduced Electron Transfer Reactions of Ruthenium(II)-Complexes Containing Amino Acid with Quinones. J Fluoresc 2014; 24:875-84. [DOI: 10.1007/s10895-014-1365-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 02/05/2014] [Indexed: 01/24/2023]
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10
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Mareeswaran PM, Rajkumar E, Sathish V, Rajagopal S. Electron transfer reactions of ruthenium(II)-bipyridine complexes carrying tyrosine moiety with quinones. LUMINESCENCE 2013; 29:754-61. [DOI: 10.1002/bio.2617] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 10/07/2013] [Accepted: 10/27/2013] [Indexed: 11/11/2022]
Affiliation(s)
| | - Eswaran Rajkumar
- School of Chemistry; Madurai Kamaraj University; Madurai Tamil Nadu India
- Vel Tech University; Avadi Chennai Tamil Nadu India
| | - Veerasamy Sathish
- School of Chemistry; Madurai Kamaraj University; Madurai Tamil Nadu India
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11
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Giribabu L, Reeta PS, Kanaparthi RK, Srikanth M, Soujanya Y. Bis(porphyrin)–Anthraquinone Triads: Synthesis, Spectroscopy, and Photochemistry. J Phys Chem A 2013; 117:2944-51. [DOI: 10.1021/jp312134a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- L. Giribabu
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, A.P., India
| | - P. Silviya Reeta
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, A.P., India
| | - Ravi Kumar Kanaparthi
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, A.P., India
| | - Malladi Srikanth
- Molecular Modelling Group, Indian Institute of Chemical Technology, Hyderabad
500067, A.P., India
| | - Y. Soujanya
- Molecular Modelling Group, Indian Institute of Chemical Technology, Hyderabad
500067, A.P., India
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12
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Hankache J, Niemi M, Lemmetyinen H, Wenger OS. Hydrogen-Bonding Effects on the Formation and Lifetimes of Charge-Separated States in Molecular Triads. J Phys Chem A 2012; 116:8159-68. [DOI: 10.1021/jp302790j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jihane Hankache
- Institut für Anorganische
Chemie, Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
| | - Marja Niemi
- Department of Chemistry and
Bioengineering, Tampere University of Technology, P.O. Box 541, FIN-33101 Tampere, Finland
| | - Helge Lemmetyinen
- Department of Chemistry and
Bioengineering, Tampere University of Technology, P.O. Box 541, FIN-33101 Tampere, Finland
| | - Oliver S. Wenger
- Institut für Anorganische
Chemie, Georg-August-Universität Göttingen, Tammannstrasse 4, D-37077 Göttingen, Germany
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13
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Hankache J, Wenger OS. Large Increase of the Lifetime of a Charge-Separated State in a Molecular Triad Induced by Hydrogen-Bonding Solvent. Chemistry 2012; 18:6443-7. [DOI: 10.1002/chem.201200199] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/02/2012] [Indexed: 11/09/2022]
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14
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Lv J, Yang D. A DFT/TDDFT study of hydrogen bonding interactions between resorufin anion and water molecules in the excited state. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Li CJ, Feng YQ, Liu XJ, Zhang TY. The synthesis of porphyrin–anthraquinone dyad via an azo-rearrangement. CHINESE CHEM LETT 2011. [DOI: 10.1016/j.cclet.2010.11.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Zhao P, Huang JW, Xu LC, Ma L, Ji LN. The photoinduced electron transference of porphyrin-anthraquinone dyads bridged with different lengths of links. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:437-442. [PMID: 21146453 DOI: 10.1016/j.saa.2010.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 10/18/2010] [Accepted: 11/15/2010] [Indexed: 05/30/2023]
Abstract
The photoinduced electron transference (PET) interaction in porphyrin containing donor-acceptor (D-A) molecules is of great importance in nature and a significant part of the PET research has been devoted to the study of its mechanism ("through-space" or "through-bond") in these decades. Herein we synthesized a series of covalently linked porphyrin-anthraquinone dyads (Por-C(n)-AQ) bridged with flexible alkoxy chains at different lengths (n=1, 4, 10) and investigated their intramolecular PET using a combination of electronic absorption, steady-state fluorescence and decayed luminescence spectra. The experimental results show that the PET efficiency depends on the length of the flexible linkage between the porphyrin and anthraquinone moieties. Meanwhile, theoretical calculation applying the density functional theory (DFT) was also carried out to give the frontier orbital distribution and the optimized structures of these dyads. It is found that the orientation of the dyad with high PET efficiency is disadvantageous to π-π interaction. Thus, the PET of these dyads seemingly is best compatible with a "through-bond" (superexchange) mechanism.
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Affiliation(s)
- Ping Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, PR China.
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17
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Kojima T, Hanabusa K, Ohkubo K, Shiro M, Fukuzumi S. Construction of SnIVPorphyrin/Trinuclear Ruthenium Cluster Dyads Linked by Pyridine Carboxylates: Photoinduced Electron Transfer in the Marcus Inverted Region. Chemistry 2010; 16:3646-55. [DOI: 10.1002/chem.200902939] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Fukuzumi S. Roles of Metal Ions in Controlling Bioinspired Electron-Transfer Systems. Metal Ion-Coupled Electron Transfer. PROGRESS IN INORGANIC CHEMISTRY 2009. [DOI: 10.1002/9780470440124.ch2] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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19
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Zhao GJ, Han KL. Effects of Hydrogen Bonding on Tuning Photochemistry: Concerted Hydrogen-Bond Strengthening and Weakening. Chemphyschem 2008; 9:1842-6. [DOI: 10.1002/cphc.200800371] [Citation(s) in RCA: 348] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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20
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Elbaz L, Korin E, Soifer L, Bettelheim A. Electrocatalytic oxygen reduction by Co(III) porphyrins incorporated in aerogel carbon electrodes. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.04.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Yuasa J, Yamada S, Fukuzumi S. One-step versus stepwise mechanism in protonated amino acid-promoted electron-transfer reduction of a quinone by electron donors and two-electron reduction by a dihydronicotinamide adenine dinucleotide analogue. Interplay between electron transfer and hydrogen bonding. J Am Chem Soc 2008; 130:5808-20. [PMID: 18386924 DOI: 10.1021/ja8001452] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Semiquinone radical anion of 1-(p-tolylsulfinyl)-2,5-benzoquinone (TolSQ(*-)) forms a strong hydrogen bond with protonated histidine (TolSQ(*-)/His x 2 H(+)), which was successfully detected by electron spin resonance. Strong hydrogen bonding between TolSQ(*-) and His x 2 H(+) results in acceleration of electron transfer (ET) from ferrocenes [R2Fc, R = C5H5, C5H4(n-Bu), C5H4Me] to TolSQ, when the one-electron reduction potential of TolSQ is largely shifted to the positive direction in the presence of His x 2 H(+). The rates of His x 2 H(+)-promoted ET from R2Fc to TolSQ exhibit deuterium kinetic isotope effects due to partial dissociation of the N-H bond in His x 2 H(+) at the transition state, when His x 2 H(+) is replaced by the deuterated compound (His x 2 D(+)-d6). The observed deuterium kinetic isotope effect (kH/kD) decreases continuously with increasing the driving force of ET to approach kH/kD = 1.0. On the other hand, His x 2 H(+) also promotes a hydride reduction of TolSQ by an NADH analogue, 9,10-dihydro-10-methylacridine (AcrH2). The hydride reduction proceeds via the one-step hydride-transfer pathway. In such a case, a large deuterium kinetic isotope effect is observed in the rate of the hydride transfer, when AcrH2 is replaced by the dideuterated compound (AcrD2). In sharp contrast to this, no deuterium kinetic isotope effect is observed, when His x 2 H(+) is replaced by His x 2 D(+)-d6. On the other hand, direct protonation of TolSQ and 9,10-phenanthrenequinone (PQ) also results in efficient reductions of TolSQH(+) and PQH(+) by AcrH2, respectively. In this case, however, the hydride-transfer reactions occur via the ET pathway, that is, ET from AcrH2 to TolSQH(+) and PQH(+) occurs in preference to direct hydride transfer from AcrH2 to TolSQH(+) and PQH(+), respectively. The AcrH2(*+) produced by the ET oxidation of AcrH2 by TolSQH(+) and PQH(+) was directly detected by using a stopped-flow technique.
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Affiliation(s)
- Junpei Yuasa
- Department of Material and Life Science, Division of Advanced Science and Biotechnology, Graduate School of Engineering, Osaka University, SORST, Japan Science and Technology Agency, Suita, Osaka 565-0871, Japan
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22
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Yuasa J, Yamada S, Fukuzumi S. Accelerating and Decelerating Effects of Metal Ions on Electron-Transfer Reduction of Quinones as a Function of Temperature and Binding Modes of Metal Ions to Semiquinone Radical Anions. Chemistry 2008; 14:1866-74. [DOI: 10.1002/chem.200701420] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Fukuzumi S. Development of bioinspired artificial photosynthetic systems. Phys Chem Chem Phys 2008; 10:2283-97. [DOI: 10.1039/b801198m] [Citation(s) in RCA: 402] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Kojima T, Nakanishi T, Harada R, Ohkubo K, Yamauchi S, Fukuzumi S. Selective Inclusion of Electron-Donating Molecules into Porphyrin Nanochannels Derived from the Self-Assembly of Saddle-Distorted, Protonated Porphyrins and Photoinduced Electron Transfer from Guest Molecules to Porphyrin Dications. Chemistry 2007; 13:8714-25. [PMID: 17665374 DOI: 10.1002/chem.200601654] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A doubly protonated hydrochloride salt of a saddle-distorted dodecaphenylporphyrin (H2DPP), [H4DPPP]Cl2, forms a porphyrin nanochannel (PNC). X-ray crystallography was used to determine the structure of the molecule, which revealed the inclusion of guest molecules within the PNC. Electron-donating molecules, such as p-hydroquinone and p-xylene, were selectively included within the PNC in sharp contrast to electron acceptors, such as the corresponding quinones, which were not encapsulated. This result indicates that the PNC can recognize the electronic character and steric hindrance of the guest molecules during the course of inclusion. ESR measurements (photoirradiation at lambda>340 nm at room temperature) of the PNC that contains p-hydroquinone, catechol, and tetrafluorohydroquinone guest molecules gave well-resolved signals, which were assigned to cation radicals formed without deprotonation based on results from computer simulations of the ESR spectra and density functional theory (DFT) calculations. The radicals are derived from photoinduced electron transfer from the guest molecules to the singlet state of H4DPP2+. Transient absorption spectroscopy by femtosecond laser flash photolysis allowed us to observe the formation of 1(H4DPP2+)*, which is converted to H4DPP+. by electron transfer from the guest molecules to 1(H4DPP2+)*, followed by fast disproportionation of H4DPP+., and charge recombination to give diamagnetic species and the triplet excited state 3(H4DPP2+)*, respectively.
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Affiliation(s)
- Takahiko Kojima
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, Japan Science and Technology Agency (JST), 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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25
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Torres T, Gouloumis A, Sanchez-Garcia D, Jayawickramarajah J, Seitz W, Guldi DM, Sessler JL. Photophysical characterization of a cytidine–guanosine tethered phthalocyanine–fullerene dyad. Chem Commun (Camb) 2007:292-4. [PMID: 17299643 DOI: 10.1039/b613086k] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new non-covalent electron transfer model system, based on the use of cytidine-guanosine hydrogen bonding interactions, is described that incorporates a phthalocyanine photodonor and a C60 fullerene acceptor.
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Affiliation(s)
- Tomas Torres
- Departamento de Quimica Organica, Universidad Autonoma de Madrid, 28049, Madrid, Spain.
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26
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Abstract
As an alternative to conventional charge-separation functional molecular models based on multi-step long-range electron transfer (ET) within redox cascades, simple donor-acceptor dyads have been developed to attain a long-lived and high-energy charge-separated (CS) state without significant loss of excitation energy. In particular, a simple molecular electron donor-acceptor dyad, 9-mesityl-10-methylacridinium ion (Acr+-Mes), is capable of fast charge separation but extremely slow charge recombination. Such a simple molecular dyad has significant advantages with regard to synthetic feasibility, providing a variety of applications for photoinduced ET catalytic systems, including efficient photocatalytic systems for the solar energy conversion and construction of organic solar cells.
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27
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Tanaka M, Ohkubo K, Gros CP, Guilard R, Fukuzumi S. Persistent Electron-Transfer State of a π-Complex of Acridinium Ion Inserted between Porphyrin Rings of Cofacial Bisporphyrins. J Am Chem Soc 2006; 128:14625-33. [PMID: 17090048 DOI: 10.1021/ja064678b] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A free-base cofacial bisporphyrin, H(4)DPOx, forms a pi-complex with acridinium ion (AcH(+)) by pi-pi interaction in benzonitrile (PhCN). Formation of the H(4)DPOx-AcH(+) pi-complex was probed by UV-vis and NMR spectroscopy. The binding constant between AcH(+) and H(4)DPOx is determined as 9.7 x 10(4) M(-)(1). Photoinduced electron transfer (ET) from the H(4)DPOx to the AcH(+) moiety occurred efficiently in the pi-complex to form the ET state (H(4)DPOx(*)(+)-AcH(*)). The ET state is successfully detected by laser flash photolysis. The lifetime of the ET state is 18 mus in PhCN at 298 K, and the quantum yield of the ET state is 90%. The temperature dependence of the ET state lifetime has been examined in the range from 273 to 353 K. The ET state lifetime exhibited a large temperature dependence, and the linear plot of ln(k(BET)T(1/2)) vs T(-)()(1), in accordance with the Marcus equation, affords the ET reorganization energy (0.54 eV). As a result, a remarkably long-lived ET state has been attained at low temperature, and virtually no decay of the ET state was observed at 77 K. Such an extremely long-lived ET state is indeed detected by steady-state UV-vis absorption spectroscopy.
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Affiliation(s)
- Makiko Tanaka
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, Japan
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28
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Photoinduced electron transfer through hydrogen bonds in a rod-like donor–acceptor molecule: A time-resolved EPR study. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.11.044] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Fukuzumi S. Bioinspired Electron-Transfer Systems and Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.177] [Citation(s) in RCA: 188] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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