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

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 conference › Paper › peer-review

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 language	English
Pages	1522
Number of pages	1
Publication status	Published - 2005
Externally published	Yes
Event	54th SPSJ Annual Meeting 2005 - Yokohama, Japan Duration: May 25 2005 → May 27 2005

Other

Other	54th SPSJ Annual Meeting 2005
Country/Territory	Japan
City	Yokohama
Period	5/25/05 → 5/27/05

All Science Journal Classification (ASJC) codes

Engineering(all)

Cite this

@conference{c273483fb65442629e37885ac69b68cd,

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

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.",

author = "Kawano, {Shin Ichiro} and Norifumi Fujita and Seiji Shinkai",

year = "2005",

language = "English",

pages = "1522",

note = "54th SPSJ Annual Meeting 2005 ; Conference date: 25-05-2005 Through 27-05-2005",

}

TY - CONF

T1 - Quater-, quinque-, and sexithiophene organogelators

T2 - 54th SPSJ Annual Meeting 2005

AU - Kawano, Shin Ichiro

AU - Fujita, Norifumi

AU - Shinkai, Seiji

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=33645641285&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645641285&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:33645641285

SP - 1522

Y2 - 25 May 2005 through 27 May 2005

ER -

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

Abstract

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