title: Chromic behaviors of hexagonal columnar liquid crystalline platinum complexes with catecholato, 2-thiophenolato, and benzenedithiolato.
abstract: Liquid crystalline (LC) platinum(II) complexes with 1,2-thiophenolato and 1,2-benzendithiolato have been newly synthesized and investigated by spectroscopy together with the catecholato analogue. The variations in coordinating atoms (O or S or O/S mixed) lead to significant modulation in electrochemical properties in solution and absorption and emission properties of the complexes both in solution media and in the condensed phases. The asymmetric, polar mesogens/chromophores consisting of Pt(II), redox-active ligands, and alkyl-substituted bipyridine commonly play important roles not only in stabilizing the columnar LC phases, but also in fluctuations of the ground state energies. A key finding of the present work is the chromic properties of LC complexes induced by the interplay of self-association of the mesogens/chromophores and their fluctuating properties.
authors.affiliation: Division of Chemistry, Faculty of Science, Hokkaido University, North 10, West 8, Kita-ku, Sapporo 060-0810, Japan. chang@sci.hokudai.ac.jp
authors.forename: Ho-Chol
authors.initials: HC
authors.lastname: Chang
authors.forename: Kazuki
authors.initials: K
authors.lastname: Komasaka
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kishida
authors.forename: Tomoki
authors.initials: T
authors.lastname: Shiozaki
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ohmori
authors.forename: Takeshi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kobayashi
authors.forename: Masako
authors.initials: M
authors.lastname: Kato
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa