期刊
MATERIALS CHEMISTRY FRONTIERS
卷 4, 期 1, 页码 257-267出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9qm00621d
关键词
-
资金
- National Natural Science Foundation of China [21571152, U1703251]
- Program for Tianshan Innovative Research Team of Xinjiang Uygur Autonomous Region [2018D14002]
- Open Fund of the Key Laboratory of Xinjiang Uygur Autonomous Region [2017D04014]
- Scientific Research Program of the Higher Education Institution of Xinjiang [XJEDU2017A001]
o-Carborane was used to alter the electronic states of pi-conjugated organic aryls and was demonstrated as an effective optical and electronic control unit to tune the photophysical properties, endowing the molecules with certain luminescence properties and modifying the HOMO and LUMO energies for electron transfer. We introduced fluorene and its heteroanalogs (carbazole, dibenzofuran and dibenzothiophene), four types of substitutes with different electron-rich or electron-deficient heteroatoms, to the two carbon atoms of o-carborane to synthesize CDC, CDN, CDO and CDSvia a modified nickel-catalyzed cross-coupling reaction. The photophysical properties of o-carborane-containing heterocyclic compounds were investigated and compared with each other. The results showed that all compounds were AIE luminogens with tunable fluorescence colors from blue to yellow emissions (lambda(em) = 465-570 nm) and possessed excellent emission quantum efficiencies in the solid state (phi(F) > 70%). Among the four o-carborane-containing heterocyclic compounds, the ground state structures confirmed by crystallographic measurements provided a close correlation of the structure and electronic properties between the pi-conjugated organic aryl groups and o-carborane. Besides, the heteroatoms controlled and altered the electronic interaction between aryls and o-carborane due to the different electron-rich or electron-deficient attributes. The HOMO and LUMO energies were estimated by DFT calculations. The excited states were calculated by TD-DFT and correlated with the corresponding absorption and emission spectra to systematically elucidate the electronic perturbation. This work not only demonstrates an efficient strategy for constructing o-carborane-containing heterocyclic AIE luminogens but also indicates that they are promising as advanced optoelectronic materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据