Turn‐On Fluorescent Photochromic Disulfonylarylthiophenes: Effect of Sulfone Groups on Fluorescence and Conversion

Bulletin of the Korean Chemical Society

Qi Ai¹ 

[1] Department of Applied Chemistry Kyung Hee University Yongin 446701 Republic of Korea

关键词: Photochromic material;    Diarylethene;    Photoisomerization;    Fluorescence switching molecules;   

DOI  :  10.1002/bkcs.11597

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

A series of diarylthiophenes containing sulfone groups were synthesized using selective sulfur oxidation of benzothiophene group by meta‐chloroperoxybenzoic acid at room temperature, and their photophysical and chemical properties were studied. These compounds exhibited good photochromic behavior with a good fatigue property under consecutive ultraviolet (UV) and visible irradiation. The ring‐closed form emitted fluorescence upon UV excitation and the wavelength of fluorescence varied depending on the substituent. Compounds 2–5 exhibited high conversion ratios, reaching 95% for compound 5, the benzoyl derivative, under UV irradiation. This high conversion is thought to be due to the lower quantum yield of the ring‐opening reaction compared to the ring‐closing reaction.

【 授权许可】

Unknown