Evidence map›Paper›PMID 39867444›Full record

ArticleACS physical chemistry Au2025

Redox-Gated Optical Modulation of Coumarin-Triphenyliminophosphorane Fluorophores.

Wei-Chu Huang, Yi-Yin Lu, Shiao-Chen Huang, Tai-Chung Lo, Shun-Yuan Luo, Wei-Hong Huang, Chih-Wei Luo, Vincent K-S Hsiao, Chih-Chien Chu

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Article in ACS physical chemistry Au, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

9 authors.

Wei-Chu HuangDepartment of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan.
Yi-Yin LuDepartment of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan.
Shiao-Chen HuangDepartment of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan.
Tai-Chung LoDepartment of Chemistry, National Chung Hsing University, Taichung 403, Taiwan.
Shun-Yuan LuoDepartment of Chemistry, National Chung Hsing University, Taichung 403, Taiwan.ORCID https://orcid.org/0000-0003-1041-6176
Wei-Hong HuangDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.
Chih-Wei LuoDepartment of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan.ORCID https://orcid.org/0000-0002-6453-7435
Vincent K-S HsiaoDepartment of Applied Materials and Optoelectronic Engineering, National Chi-Nan University, Puli 545, Taiwan.
Chih-Chien ChuDepartment of Medical Applied Chemistry, Chung Shan Medical University, Taichung 402, Taiwan.ORCID https://orcid.org/0000-0001-6712-0064

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Novel coumarin-triphenyliminophosphorane (TPIPP) fluorophores, synthesized via a nonhydrolytic Staudinger reaction, exhibit remarkable redox-responsive optical properties. Upon chemical and electrochemical oxidation, these compounds display a hypsochromic shift in absorption from 430 to 350 nm, accompanied by up to 11-fold fluorescence enhancement under 405 nm excitation. The fluorescence switching occurs at an electrochemical oxidation potential of approximately +2.0 V. This enhanced one-photon excited fluorescence is attributed to an emissive radical effect, stemming from in situ generated radical cations at the polarizable iminophosphorane (P=N) bond. The radical formation was confirmed by trapping experiments using tetracyanoquinodimethane, which produced characteristic absorption of radical anions around 850 nm, and by electron spin resonance studies using 5,5-dimethyl-1-pyrroline

Identifiers

PMID39867444
PMCPMC11758267

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