期刊
CHEMISTRYSELECT
卷 2, 期 5, 页码 1959-1966出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201602044
关键词
AIE; ESIPT; Fluorescence; Photochemistry; Positional isomers
资金
- Japan Society for the Promotion of Science (JSPS) [2604063, 26102011, 26810023, 26102001]
- Grants-in-Aid for Scientific Research [26810023, 15H03791, 26102011, 16K13979, 26102007] Funding Source: KAKEN
Three positional isomers based on carbazole (Cz) and hydroxy benzothiazole (HBT) were synthesized targeting solid state organic emitters by Suzuki coupling reaction and their optical, structural and electronic properties were compared. The changing of position of HBT unit on 9-phenyl-9H-carbazole alters the optical and structural properties significantly. The synthesized compounds are highly emissive in solid and aggregated state (Phi(f)= similar to 40%) and weakly emissive in solvents of different polarities (Phi(f)= 2.6-17 %). The difference in the fluorescence quantum efficiency among the positional isomers can be assigned to conformational differences which were further supported by geometrical parameters computed by DFT computations. The present Cz-HBT based ESIPT motifs are endowed with aggregation induced emission (AIE), solid state and polarity sensitive emission with large Stokes shift.
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