Journal
MATERIALS CHEMISTRY FRONTIERS
Volume 2, Issue 10, Pages 1884-1892Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qm00294k
Keywords
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Funding
- National Natural Science Foundation of China [21574085, 21490570, 21490574]
- National Natural Science Foundation of Guangdong Province [2016A030312002, 2017A030313067]
- Fundamental Foundation of Shenzhen [JCYJ20170302143846672]
- Science and Technology Plan of Shenzhen [JCYJ20160229205601482]
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This work provides a feasible strategy for future design of CPL materials and ion sensors. By introducing chiral alanine to hydrazone derivatives, two novel chiral molecules 1 and 2 with aggregation-induced emission enhanced (AIEE) characteristics were designed and synthesized. Molecule 1 had the two phenyl groups connecting to hydrazone covalenty bonded, so its fluorophore is more conjugated than that of 2. This subtle structural variation between 1 and 2 had a considerable influence on their photophysical properties, chiral optical properties and self-assembly behaviors. Both kinds of molecules could self-assemble into Long helical nanofibers with Lengths up to several microns upon aggregation. They both possessed AIEE properties, but 1 emitted red fluorescence and 2 had yellow fluorescence upon aggregation. They also had aggregation induced circular dichroism (CD) and circularly polarized Luminescence (CPL) properties, but 1 had better performance because its fluorophore was more conjugated than that of 2. However, only 2 had a specific interaction with Cu2+ and it showed a highly selective and sensitive turn-off fluorescence response to Cu2+.
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