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Updated: Aug 30, 2025

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A tetrazole-ene photoactivatable fluorophore with improved brightness and stability in protic solution
Yi-Kang Zhang1, Meng Li1, Lan Ruan1
1School of Chemical Science and Technology & Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan University, Kunming, 650091, P. R. China. anp@ynu.edu.cn.
Abstract:
The pyrazoline fluorophore, generated by photoinduced tetrazole-ene cycloaddition, shows faint fluorescence in protic solvents. To suppress this fluorescence-quenching, we rationally designed a series of substituted diaryl tetrazoles at the N-side phenyl ring to produce a tetrazole-ene based photoactivatable fluorophore. Spectroscopic and cellular imaging studies demonstrated that the version of the fluorophore with a bis(trifluoromethyl)benzene substituent exhibited significantly enhanced brightness and photostability.
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