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Ester-derivatized indoles as fluorescent and infrared probes for hydration environments
张文凯
Author NameAffiliationE-mail
张文凯 Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University, Beijing 100875, China wkzhang@bnu.edu.cn 
Abstract:
Tryptophan derivatives have long been used as site-specific biological probes. 4-Cyanotryptophan emits in the visible region and is the smallest blue fluorescent amino acid probe for biological applications. Other indole or tryptophan analogs may emit at even longer wavelengths than 4-cyanotryptophan. We performed FTIR, UV-Vis, and steady-state and time-resolved fluorescence spectroscopy on six ester-derivatized indoles in different solvents. Methyl indole-4-carboxylate emitted at 450 nm with a long fluorescence lifetime, and is a promising candidate for a fluorescent probe. The ester-derivatized indoles could be used as spectroscopic probes to study local protein environments. Our measurements provide a guide for choosing ester-derivatized indoles to use in practice and data for computational modeling of the effect of substitution on the electronic transitions of indole.
Key words:  IR probe, Fluorescent probe, Tryptophan derivative, Indole derivative
FundProject:
Ester-derivatized indoles as fluorescent and infrared probes for hydration environments
张文凯
摘要:
Tryptophan derivatives have long been used as site-specific biological probes. 4-Cyanotryptophan emits in the visible region and is the smallest blue fluorescent amino acid probe for biological applications. Other indole or tryptophan analogs may emit at even longer wavelengths than 4-cyanotryptophan. We performed FTIR, UV-Vis, and steady-state and time-resolved fluorescence spectroscopy on six ester-derivatized indoles in different solvents. Methyl indole-4-carboxylate emitted at 450 nm with a long fluorescence lifetime, and is a promising candidate for a fluorescent probe. The ester-derivatized indoles could be used as spectroscopic probes to study local protein environments. Our measurements provide a guide for choosing ester-derivatized indoles to use in practice and data for computational modeling of the effect of substitution on the electronic transitions of indole.
关键词:  IR probe, Fluorescent probe, Tryptophan derivative, Indole derivative
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