Controlled Helical Distortion of Double Thia[7]helicenes via Inner-Rim Alkyl Substitution

Organic Letters 2026

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Authors: Dehe Wang, Jingyun Tan, Long Zhou, Wang Sun, Yingping Zou, Yunbin Hu
DOI: 10.1021/acs.orglett.6c00027
Cited by: 2
References: 46

Abstract

Precise control of helical distortion in double helicenes is challenging due to their high intrinsic strain. Herein, we report modulation of helical distortion in a double thia[7]helicene through inner-rim alkyl substitution. Structural and computational studies reveal increased backbone distortion and enhanced intramolecular through-space interactions. These subtle structural variations lead to notable changes in optical, electronic, and chiroptical properties and enable efficient singlet oxygen photosensitization.

Fields of Study & Subjects

Synthesis and Properties of Aromatic Compounds Photochromic and Fluorescence Chemistry Supramolecular Chemistry and Complexes

Publication details

Journal / source
Organic Letters
Publisher
American Chemical Society (ACS)
Volume
28
Issue
8
Pages
2638–2643
Publication date
16 February 2026
Language
EN