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Wang X, Vapaavuori J, Bazuin CG, Pellerin C. Molecular-Level Study of Photoorientation in Hydrogen-Bonded Azopolymer Complexes. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02534] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Xiaoxiao Wang
- Département de chimie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - Jaana Vapaavuori
- Département de chimie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - C. Geraldine Bazuin
- Département de chimie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, Canada H3C 3J7
| | - Christian Pellerin
- Département de chimie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC, Canada H3C 3J7
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Grebenkin S, Bol’shakov B, Syutkin VM. Study of Molecular Dynamics in Poly(n-alkyl methacrylates) by Light Induced Absorption Anisotropy. J Phys Chem B 2014; 118:9800-7. [DOI: 10.1021/jp504276y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- S. Grebenkin
- Institute of Chemical Kinetics and Combustion, Novosibirsk, 630090, Russian Federation
| | - B. Bol’shakov
- Institute of Chemical Kinetics and Combustion, Novosibirsk, 630090, Russian Federation
| | - V. M. Syutkin
- Institute of Chemical Kinetics and Combustion, Novosibirsk, 630090, Russian Federation
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Grebenkin SY, Syutkin VM. Librations of probe molecules in polymeric matrixes. J Phys Chem B 2014; 118:2568-75. [PMID: 24521212 DOI: 10.1021/jp412476s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Formation of optical anisotropy under linearly polarized light has been studied in films of poly(n-butyl methacrylate) and poly(n-hexyl methacrylate) doped with azo compound (1-naphthyl-p-azo-methoxybenzene). Time profiles of the absorption anisotropy and absorbance can not be fitted with a commonly used model of anisotropy formation, which includes the transition dipole turns upon cis-trans isomerization and the rotational diffusion: the experimental values of anisotropy happen to be much lower than the calculated ones. To explain the low anisotropy level, fast molecular librations, i.e., stochastic pendulum-like oscillations of azo molecules about their average orientations were introduced. Numerical simulation of anisotropy and absorbance time profiles with the modified model gives estimates for average libration amplitude of 45-60° at temperatures 25-65 K below T(g).
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Affiliation(s)
- S Yu Grebenkin
- Institute of Chemical Kinetics and Combustion, Novosibirsk, 630090, Russian Federation
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Zettsu N, Ogasawara T, Arakawa R, Nagano S, Ubukata T, Seki T. Highly Photosensitive Surface Relief Gratings Formation in a Liquid Crystalline Azobenzene Polymer: New Implications for the Migration Process. Macromolecules 2007. [DOI: 10.1021/ma0706428] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nobuyuki Zettsu
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
| | - Toshinobu Ogasawara
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
| | - Ryusuke Arakawa
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
| | - Susaku Nagano
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
| | - Takashi Ubukata
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
| | - Takahiro Seki
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita Osaka 565-0871, Japan; and Department of Graduate School of Engineering, Yokohama National University, Tokiwadai, Hodogaya, Yokohama 240-8501, Japan
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