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.
|Number of pages||1|
|Publication status||Published - Dec 1 2005|
|Event||54th SPSJ Annual Meeting 2005 - Yokohama, Japan|
Duration: May 25 2005 → May 27 2005
|Other||54th SPSJ Annual Meeting 2005|
|Period||5/25/05 → 5/27/05|
All Science Journal Classification (ASJC) codes