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Issue 1, 2014
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Complexation-induced circular dichroism and circularly polarised luminescence of an aggregation-induced emission luminogen

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Abstract

We here report a molecule with chiral recognition capability by a mechanism of complexation-induced circularly polarised luminescence (CPL) in the solid thin film state. A molecule (1) containing the luminogenic unit silole and chiral phenylethanamine pendants is synthesized and characterized with standard spectroscopic methods. In a solution of 1, no circular dichroism (CD) or fluorescence emission are observed. When aggregated into nanoparticles in a poor solvent, fluorescence is turned on but CD is still silent. When complexed with chiral acids to form a thin film, molecule 1 becomes CD-active and strongly fluorescent, showing simultaneous complexation-induced CD (CICD) and aggregation-induced emission (AIE) effects. The assemblies of 1 with different enantiomers of mandelic acid emit distinctly handed circularly polarised light and display CPL dissymmetry factors with absolute value around 0.01. This work provides a new platform for creating molecular functional materials with solid-state chiral sensing ability through reading CPL output signals.

Graphical abstract: Complexation-induced circular dichroism and circularly polarised luminescence of an aggregation-induced emission luminogen

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Publication details

The article was received on 19 Aug 2013, accepted on 08 Oct 2013 and first published on 09 Oct 2013


Article type: Paper
DOI: 10.1039/C3TC31633E
Citation: J. Mater. Chem. C, 2014,2, 78-83

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    Complexation-induced circular dichroism and circularly polarised luminescence of an aggregation-induced emission luminogen

    J. C. Y. Ng, J. Liu, H. Su, Y. Hong, H. Li, J. W. Y. Lam, K. S. Wong and B. Z. Tang, J. Mater. Chem. C, 2014, 2, 78
    DOI: 10.1039/C3TC31633E

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