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Chemical Communications

Stereoisomer resolution of 2-ethylhexyl-substituted cyclopentadithiophene and its effect on optical properties of donor–acceptor–donor conjugated molecules

Kenta Yamada,a   Wataru Suzuki, ORCID logo a   Jun-ichi Nishida, ORCID logo *a   Masayuki Gon, ORCID logo bc   Kazuo Tanaka ORCID logo bc  and  Tomokazu Umeyama ORCID logo *a  

* Corresponding authors

a Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, Himeji, Hyogo 671-2280, Japan
E-mail: umeyama@eng.u-hyogo.ac.jp, jnishida@eng.u-hyogo.ac.jp

b Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan

c Department of Technology and Ecology, Graduate School of Global Environmental Studies, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan

Abstract

Mono-formylated cyclopentadithiophene bearing two 2-ethylhexyl chains (CPDT-CHO) was successfully resolved into three stereoisomer fractions, assigned as (R,S), (S,R), and a mixture of (R,R) and (S,S). The distinct stereochemistry influenced the absorption spectra of the corresponding CPDT–acceptor–CPDT conjugated molecules.

Graphical abstract: Stereoisomer resolution of 2-ethylhexyl-substituted cyclopentadithiophene and its effect on optical properties of donor–acceptor–donor conjugated molecules

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Article information

DOI
https://doi.org/10.1039/D5CC02779A
Article type
Communication
Submitted
16 May 2025
Accepted
30 Jul 2025
First published
05 Aug 2025

Chem. Commun., 2025, Advance Article

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Stereoisomer resolution of 2-ethylhexyl-substituted cyclopentadithiophene and its effect on optical properties of donor–acceptor–donor conjugated molecules

K. Yamada, W. Suzuki, J. Nishida, M. Gon, K. Tanaka and T. Umeyama, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC02779A

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