Quater-, quinque-, and sexithiophene organogelators: Structure, thermochromism, and heating-free sol-gel phase-control triggered by redox-stimuli

Shin Ichiro Kawano, Norifumi Fujita, Seiji Shinkai

Research output: Contribution to conferencePaper

Abstract

A series of quater-, quinque-, and sexithiophene derivatives bearing two cholesteryl groups at the exposition, which are abbreviated as 4T-(chol) 2, 5T-(chol)2, and 6T-(chol)2, respectively, were synthesized. It was found that these oligothiophene derivatives work as excellent organogelators for various organic fluids and show the unique thermochromic behaviors through the sol-gel phase-transition. From investigations on the organogels by their absorption, CD spectroscopic analyses, and TEM, SEM, and AFM, these gelators self-assemble in the one-dimensional manner in the organogels, where the π-block moieties of the oligothiophenes are stacked in H-aggregate fashion. In addition, a sol-gel phase-transition of the 6T-(chol)2 gel was implemented by addition of oxidizing and reducing reagent such FeCl3, ascorbic acid, respectively. The functionality of the organogels makes them promising candidates for opto- and electronic soft materials.

Original languageEnglish
Number of pages1
Publication statusPublished - Dec 1 2005
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: May 25 2005May 27 2005

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period5/25/055/27/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Kawano, S. I., Fujita, N., & Shinkai, S. (2005). Quater-, quinque-, and sexithiophene organogelators: Structure, thermochromism, and heating-free sol-gel phase-control triggered by redox-stimuli. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.