Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 2, Issue 1, Pages 78-83Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc31633e
Keywords
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Funding
- National Basic Research Program of China (973 Program) [2013CB834701]
- Research Grants Council of Hong Kong [HKUST2/CRF/10, N_HKUST620/11]
- University Grants Committee of Hong Kong [AoE/P-03/08]
- Guangdong Innovative Research Team Program of China [201101C0105067115]
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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.
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