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Boronate-Based Fluorescence Probes for the Detection of Hydrogen Peroxide

Boronate-Based Fluorescence Probes for the Detection of Hydrogen Peroxide

Emma V Lampard, Adam C Sedgwick, Xiaolong Sun, Katherine L Filer, Samantha C Hewins, Gyoungmi Kim, Juyoung Yoon, Steven D Bull, Tony D James

ChemistryOpen. 2018 Jan 26;7(3):262-265.

PMID: 29531890

Abstract:

In this work, we synthesized a series of boronate ester fluorescence probes (E)-4,4,5,5-tetramethyl-2-(4-styrylphenyl)-1,3,2-dioxaborolane (STBPin), (E)-N,N-dimethyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)aniline (DSTBPin), (E)-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)benzonitrile (CSTBPin), (E)-2-(4-(4-methoxystyryl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (MSTBPin), (E)-N,N-dimethyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)styryl)naphthalen-1-amine (NDSTBPin), and N,N-dimethyl-4-(2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazol-5-yl)aniline (DAPOX-BPin) for the detection of hydrogen peroxide (H2O2). DSTBPin and MSTBPin displayed an "Off-On" fluorescence response towards H2O2, owing to the loss of the intramolecular charge transfer (ICT) excited state. Whereas, CSTBPin displayed a decrease in fluorescence intensity in the presence of H2O2 owing to the introduction of an ICT excited state. STBPin, on the other hand, produced a small fluorescence decrease, indicating the importance of an electron-withdrawing or electron-donating group in these systems. Unfortunately, the longer wavelength probe, NDSTBPin, displayed a decrease in fluorescence intensity. Oxazole-based probe DAPOX-BPin produced a "turn-on" response. Regrettably, DAPOX-BPin required large concentrations of H2O2 (>3 mm) to produce noticeable changes in fluorescence intensity and, therefore, no change in fluorescence was observed in the cell imaging experiments.

Chemicals Related in the Paper:

Catalog Number	Product Name	Price
LS793333	4,4,5,5-tetramethyl-2-(3-trifluoromethoxyphenyl)-1,3,2-dioxaborolane	Price
LS793334	2-(4-fluoro-2-methylphenyl)4,4,5,5-tetramethyl-1,3,2-dioxaborolane	Price
LS793384	2-[3-([1,3]dioxolan-2-ylmethoxy)-phenyl]-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane	Price

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