Citation:
Liu Lei, Lv Haijun, Wang Mengyan, Chen Aibing, Yu Yifeng, Wang Lili, Wang Binbin. AIE Properties of Small Linear Conjugated Compounds Based on RIR[J]. Chemistry,
;2016, 79(1): 43-47.
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In this article, six linear molecules including 4-butyl-1,1'-biphenyl (L1), 4,4'-diisopropyl-1,1'-biphenyl (L2), 5,5'-dimethyl-2,2'-bipyridine (L3), 2-([1,1'-biphenyl]-4) thiophene (L4), 1,1'-binaphthyl (L5), and 5-phenyl-2,2'-bithiophene (L6) were synthesized. Their luminescent properties were studied by UV-Vis and fluorescence spectra. The results revealed that compound L1, L2 and L3 show AIE properties, while L4, L5, L6 show ACQ properties. We extrapolated that biphenyl-like compounds are AIE active, and restriction of intramolecular rotation (RIR) in the aggregates is the cause for the AIE effect. But linear molecules with more or larger aromatic rings show ACQ phenomena.
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Keywords:
- Aggregation-induced-emission,
- Linear,
- Conjugate,
- Fluorescence
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