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Energy Aspects of Thermal Molecular Switching: Molecular Thermal Hysteresis of Helicene Oligomers
Author(s) -
Shigeno Masanori,
Kushida Yo,
Yamaguchi Masahiko
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500210
Subject(s) - helicene , metastability , non equilibrium thermodynamics , thermal hysteresis , chemical physics , hysteresis , thermal , thermodynamics , molecule , thermal stability , chemistry , materials science , kinetic energy , condensed matter physics , organic chemistry , phase transition , physics , quantum mechanics
Molecular switching is a phenomenon by which a molecule reversibly changes its structure and state in response to external stimuli or energy. Herein, molecular switching is discussed from thermodynamic and kinetic aspects in terms of energy supply with an emphasis on the thermal switching exhibited by helicene oligomers. It includes the inversion of relative thermodynamic stability induced by temperature changes and molecular thermal hysteresis in a closed system. The thermal phenomenon associated with the oligomers involves population/concentration changes between metastable states under nonequilibrium thermodynamic control.