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Issue 31, 2015
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Film-type chemosensors based on boron diiminate polymers having oxidation-induced emission properties

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Abstract

We present here the film-type chemosensors based on stimuli-responsive emissive polymers. The turn-on fluorescent conjugated polymers in the film state were designed by employing boron diiminates having aggregation-induced emission (AIE) properties to obtain strong emission from the solid state. We prepared the films with AIE-active copolymers composed of fluorenes and sulfide-substituted boron diiminates and evaluated the changes in their optical properties by oxidation. By soaking the film samples of the polymer in a H2O2 solution, a significant increase of the emission intensity was observed by oxidation. The quantum yields increased up to 3 times by oxidation at the sulfide groups. This would be attributed to the facilitating charge transfer (CT)-emissive fluorescence between the fluorene units and the boron diiminates having an enhanced electron-withdrawing ability by replacing the sulfide with the sulfoxide groups. These materials should be a suitable platform as bioprobes for longitudinal monitoring of bio-related reactions.

Graphical abstract: Film-type chemosensors based on boron diiminate polymers having oxidation-induced emission properties

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Publication details

The article was received on 15 Jan 2015, accepted on 21 Feb 2015 and first published on 03 Mar 2015


Article type: Paper
DOI: 10.1039/C5PY00055F
Polym. Chem., 2015,6, 5590-5595

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    Film-type chemosensors based on boron diiminate polymers having oxidation-induced emission properties

    A. Hirose, K. Tanaka, R. Yoshii and Y. Chujo, Polym. Chem., 2015, 6, 5590
    DOI: 10.1039/C5PY00055F

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