A Solid‐State Fluorescent Material Based on Carbazole‐Containing Difluoroboron β‐Diketonate: Multiple Chromisms, the Self‐Assembly Behavior, and Optical Waveguides

A carbazole‐containing difluoroboron β‐diketonate complex (BCZ), which shows strong fluorescence in both the solid state and in organic solutions, is reported. The crystalline materials of BCZ obtained from different solvents display different emission colors. Single‐crystal analysis reveals that th...

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Bibliographic Details
Published in:Advanced functional materials 2017-07, Vol.27 (25), p.n/a
Main Authors: Chen, Peng‐Zhong, Zhang, Han, Niu, Li‐Ya, Zhang, Yi, Chen, Yu‐Zhe, Fu, Hong‐Bing, Yang, Qing‐Zheng
Format: Article
Language:English
Subjects:
difluoroboron dyes
fluorescence
self‐assembly
stimuli response
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Summary:A carbazole‐containing difluoroboron β‐diketonate complex (BCZ), which shows strong fluorescence in both the solid state and in organic solutions, is reported. The crystalline materials of BCZ obtained from different solvents display different emission colors. Single‐crystal analysis reveals that the enhanced overlap between adjacent molecules induces increased excited‐state delocalization and is responsible for the variation of the emission colors from yellow to red. The emission colors of the materials are effectively tuned by external stimuli such as grinding, heating, and solvent vapor. The powder X‐ray diffraction, differential scanning calorimetry, thermogravimetric analysis, and 1H NMR studies on materials of BCZ reveal that the thermochromic properties of BCZ are closely related to the removal of solvent molecules from the crystalline powders upon heating. Moreover, uniform 1D microstructures of BCZ obtained by solvent exchange in solution exhibit optical waveguide property with low optical loss. A solid‐state fluorescent material based on carbazole‐containing BF2bdk complex (BCZ) is reported. The emission colors of BCZ in solid state are dependent on its molecular packing modes and are successfully tuned upon external stimuli, such as grinding, heating, and solvent fuming. The uniform microrod of BCZ exhibits optical waveguide properties with low optical loss.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201700332