Liquid Crystals Comprising π-Electronic Ions from Porphyrin-AuIII Complexes

Yohei Haketa; Yuya Bando; Yoshifumi Sasano; Hiroki Tanaka; Nobuhiro Yasuda; Ichiro Hisaki; Hiromitsu Maeda

doi:10.1016/j.isci.2019.03.027

Liquid Crystals Comprising π-Electronic Ions from Porphyrin-Au^III Complexes

iScience. 2019 Apr 26:14:241-256. doi: 10.1016/j.isci.2019.03.027. Epub 2019 Apr 1.

Authors

Yohei Haketa¹, Yuya Bando¹, Yoshifumi Sasano¹, Hiroki Tanaka¹, Nobuhiro Yasuda², Ichiro Hisaki³, Hiromitsu Maeda⁴

Affiliations

¹ Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan.
² Research and Utilization Division, Japan Synchrotron Radiation Research Institute, Sayo 679-5198, Japan.
³ Green Nanotechnology Research Center, Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan.
⁴ Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525-8577, Japan. Electronic address: maedahir@ph.ritsumei.ac.jp.

Abstract

Porphyrin-Au^III complexes were found to act as π-electronic cations, which can combine with various counteranions, including π-electronic anions. Single-crystal X-ray analyses revealed the formation of assemblies with contributions of charge-by-charge and charge-segregated assemblies, depending on the geometry and electronic state of the counteranions. Porphyrin-Au^III complexes possessing aliphatic alkyl chains formed dimension-controlled ion-pairing assemblies as thermotropic liquid crystals, whose ionic components were highly organized by π-π stacking and electrostatic interactions.

Keywords: Chemistry; Electronic Materials; Supramolecular Chemistry.