Optical Properties and Photo-Oxidation of Tetraphenylethene-Based Fluorophores

被引：116

作者：

Aldred, Matthew P. ^{[1
]}

Li, Chong ^{[1
]}

Zhu, Ming-Qiang ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 50期

关键词：

aggregation; biosensors; luminescence; optical physics; oxidation; AGGREGATION-INDUCED EMISSION; EFFICIENT LIGHT EMITTERS; EXCITED SINGLET-STATE; SUBSTITUTED TETRAPHENYLETHENES; SOLID-STATE; FLUORESCENCE; DEPENDENCE; STILBENE; PHOTOCYCLIZATION; PHOTOISOMERIZATION;

D O I：

10.1002/chem.201202715

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

We report the optical properties of tetraphenylethene (TPE) and other TPE derivatives functionalised with an octyl group (TPE-OCT) and polyethyleneglycol group (TPE-PEG) in the side chain. We compared TPE-OCT and TPE-PEG with TPE in both organic solvents and under aqueous conditions. All materials exhibit aggregation-induced emission, however, uncommonly, TPE-PEG seems to aggregate in aqueous solution with enhanced photoluminescence quantum efficiency (PLQE) relative to that in organic solvents. All three materials can be photo-oxidised in solution to their diphenylphenanthrene derivative by irradiation with UV light (at both approximate to 1 and approximate to 5 mW?cm-2), with a subsequent enhancement in PL efficiency. The electron-donating ether group increases the rate of oxidation relative to bare TPE and also photo-oxidation was shown to be solvent and concentration dependent. Finally, photo-oxidation was also demonstrated in the aggregate state.

引用

页码：16037 / 16045

页数：9

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