期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 6, 期 1, 页码 19-28出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc03780e
关键词
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资金
- National Basic Research Program of China [2014CB648300, 2017YFB0404500, 2013CB932902]
- National Natural Science Foundation of China [21404059, 21422402, 21674050]
- Natural Science Foundation of Jiangsu Province [BK20140867, BK20140060, BK20130037]
- NUPT 1311 Project''
- Scientific Foundation [NY213119, NY213169]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- National Key Research and Development Program [2016YFA0501602]
We described herein a unique dual emission switching process from o-carborane-tetraphenylethene (TPE) dyads induced by twisted intramolecular charge transfer (TICT) in the crystalline state. Two novel o-carborane-tetraphenylethylene dyads, composed of a TPE core bearing o-carborane units, were designed, synthesized and characterized. Crystalline o-1 and o-2 were obtained with mono-substituted and bi-substituted o-carborane units, respectively. Both dyads presented locally excited (LE) emission and TICT induced emission in solutions. Crystalline o-1 demonstrated aggregation-induced emission (AIE), crystallization-induced emission (CIE), thermochromism, vapochromism, and mechanical luminescence (MCL) properties via TICT, while crystalline o-2 showed only the AIE and CIE properties orginating from the inherent ICT states. From the mechanistic investigations and theoretical calculations, it was demonstrated that the emission was reversible and switchable between green and orange colors for o-1, which was assigned to the facile TICT modulation in the solid state. The results manifest that the unique three-dimensional o-carborane cluster's structure plays an important role in precisely controlling the molecular packing patterns and conformations to achieve TICT emission.
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