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Miura T, Tao R, Shibata S, Umeyama T, Tachikawa T, Imahori H, Kobori Y. Geometries, Electronic Couplings, and Hole Dissociation Dynamics of Photoinduced Electron–Hole Pairs in Polyhexylthiophene–Fullerene Dyads Rigidly Linked by Oligophenylenes. J Am Chem Soc 2016; 138:5879-85. [DOI: 10.1021/jacs.5b13414] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taku Miura
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1
Rokkodaicho, Nada-ku, Kobe 657-8501, Japan
| | - Ran Tao
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Sho Shibata
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tomokazu Umeyama
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takashi Tachikawa
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1
Rokkodaicho, Nada-ku, Kobe 657-8501, Japan
| | - Hiroshi Imahori
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Institute
for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yasuhiro Kobori
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1
Rokkodaicho, Nada-ku, Kobe 657-8501, Japan
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Forbes MDE, Dukes KE, Avdievich NI, Harbron EJ, DeSimone JM. Flexible Biradicals in Liquid and Supercritical Carbon Dioxide: The Exchange Interaction, the Chain Dynamics, and a Comparison with Conventional Solvents. J Phys Chem A 2006; 110:1767-74. [PMID: 16451006 DOI: 10.1021/jp053183q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
X-band time-resolved electron paramagnetic resonance (TREPR) spectra of three flexible biradicals of varying chain length and structure were obtained in liquid and supercritical carbon dioxide (CO2) solutions and compared to conventional solvents. For C16 acyl-alkyl biradical 1a, an average spin exchange interaction between the radical centers, J(avg), was obtained by spectral simulation using a simple model for spin-correlated radical pairs (SCRPs) and a small amount of T2 relaxation from a previously established J modulation mechanism. A large solvent effect on J(avg) was observed for the first time, varying by almost 1 order of magnitude from CO2 (J(avg) = -120 +/- 10 MHz) to heavy mineral oil (-11 +/- 3 MHz) for 1a. For C15 bis(alkyl) biradical 1b, spectra obtained under supercritical conditions are only slightly different from those detected in liquid CO2 but differ from spectra taken in benzene. For C10 acyl-alkyl biradical 2a, more emissive spin polarization due to S-T- mixing is observed in CO2 than in benzene. These results are discussed in terms of solvent properties such as dielectric constant, viscosity, and specific interactions. Both chain dynamics and changes to the equilibrium distribution of end-to-end distances can alter J(avg) and the observed ratio of S-T0 to S-T- mixing; however, faster chain dynamics is concluded to be the most likely cause of the observed effects in these systems.
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Affiliation(s)
- Malcolm D E Forbes
- Department of Chemistry, CB No. 3290, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
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Liao Y, Xie C, Lahti PM, Weber RT, Jiang J, Barr DP. 3,5-Di-tert-butyl-3‘-(N-tert-butyl-N-aminoxy)-4-oxybiphenyl: A Heterospin Diradical with Temperature Dependent Behavior. J Org Chem 1999; 64:5176-5182. [DOI: 10.1021/jo990317l] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi Liao
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
| | - Chunping Xie
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
| | - Paul M. Lahti
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
| | - Ralph T. Weber
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
| | - JinJie Jiang
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
| | - David P. Barr
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 and Bruker Instruments Inc., Billerica, Massachusetts 01821
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Kobori Y, Takeda K, Tsuji K, Kawai A, Obi K. Exchange Interaction in Radical−Triplet Pairs: Evidences for CIDEP Generation by Level Crossings in Triplet−Doublet Interactions. J Phys Chem A 1998. [DOI: 10.1021/jp980870r] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yasuhiro Kobori
- Department of Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro, Tokyo 152, Japan
| | - Keizo Takeda
- Department of Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro, Tokyo 152, Japan
| | - Kazuhide Tsuji
- Department of Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro, Tokyo 152, Japan
| | - Akio Kawai
- Department of Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro, Tokyo 152, Japan
| | - Kinichi Obi
- Department of Chemistry, Tokyo Institute of Technology, Ohokayama, Meguro, Tokyo 152, Japan
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Consecutive Biradicals during the Photolysis of 2,12-Dihydroxy-2,12-dimethylcyclododecanone: Low- and High-Field Chemically Induced Dynamic Nuclear Polarizations (CIDNP) Study. J Phys Chem A 1998. [DOI: 10.1021/jp980271k] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Time-resolved ESR in a spin-correlated radical pair with large hyperfine coupling constant at 31P. Micellar size effects and the role of flip-flop transitions. Chem Phys 1998. [DOI: 10.1016/s0301-0104(97)00330-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Tsentalovich YP, Morozova OB, Avdievich NI, Ananchenko GS, Yurkovskaya AV, Ball JD, Forbes MDE. Influence of Molecular Structure on the Rate of Intersystem Crossing in Flexible Biradicals. J Phys Chem A 1997. [DOI: 10.1021/jp972717n] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuri P. Tsentalovich
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Olga B. Morozova
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Nikolai I. Avdievich
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Gennady S. Ananchenko
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Alexandra V. Yurkovskaya
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Jonathan D. Ball
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Malcolm D. E. Forbes
- International Tomography Center, Institutskaya 3a, 630090, Novosibirsk-90, Russia, and Venable and Kenan Laboratories, Department of Chemistry, CB#3290, University of North Carolina, Chapel Hill, North Carolina 27599
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Avdievich NI, Dukes KE, Forbes MDE, DeSimone JM. Time-Resolved EPR Study of a 1,9-Flexible Biradical Dissolved in Liquid Carbon Dioxide. Observation of a New Spin-Relaxation Phenomenon: Alternating Intensities in Spin-Correlated Radical Pair Spectra. J Phys Chem A 1997. [DOI: 10.1021/jp961947j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nikolai I. Avdievich
- Venable and Kenan Laboratories, Department of Chemistry, CB No. 3290 University of North Carolina, Chapel Hill, North Carolina 27599
| | - Katerina E. Dukes
- Venable and Kenan Laboratories, Department of Chemistry, CB No. 3290 University of North Carolina, Chapel Hill, North Carolina 27599
| | - Malcolm D. E. Forbes
- Venable and Kenan Laboratories, Department of Chemistry, CB No. 3290 University of North Carolina, Chapel Hill, North Carolina 27599
| | - Joseph M. DeSimone
- Venable and Kenan Laboratories, Department of Chemistry, CB No. 3290 University of North Carolina, Chapel Hill, North Carolina 27599
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Forbes MDE, Avdievich NI, Ball JD, Schulz GR. Chain Dynamics Cause the Disappearance of Spin-Correlated Radical Pair Polarization in Flexible Biradicals. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960245r] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Malcolm D. E. Forbes
- Venable and Kenan Laboratories, Department of Chemistry, CB 3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Nikolai I. Avdievich
- Venable and Kenan Laboratories, Department of Chemistry, CB 3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Jonathan D. Ball
- Venable and Kenan Laboratories, Department of Chemistry, CB 3290, University of North Carolina, Chapel Hill, North Carolina 27599
| | - Gregory R. Schulz
- Venable and Kenan Laboratories, Department of Chemistry, CB 3290, University of North Carolina, Chapel Hill, North Carolina 27599
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