期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 1, 期 16, 页码 2842-2850出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc00851g
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资金
- National Science Council, Taiwan, Republic of China [NSC 101-2221-E-110-022]
Organic and polymeric deep-blue luminogens based on the 2,4,6-triphenylpyridine (TPP) structure were prepared via the facile Chichibabin reaction and their fluorescence behavior in relation to the aggregation-enhanced emission (AEE) properties were evaluated in this study. For the low-mass luminogens, the emission behavior of TPP and cyano-functionalized TPP (TPP-CN) in solvent-non-solvent pairs was related to the crystallization-enhanced emission (CEE) behavior, which can also be verified by the enhanced emission in the crystalline structures developed by the solvent-fuming process. For a polymeric system, a low M-w PTPP oligomer consisting wholly of TPP repeating units and a PTPPF copolymer containing alternative TPP and 9,9-dioctylfluorene units were prepared through Suzuki coupling reactions and in contrast to TPP and TPP-CN, both of them were amorphous materials with strong solution fluorescence that remained relatively intact in different solvent-non-solvent mixtures. The constant emission behavior was therefore explained by the restricted molecular rotation of the rigid chain segments in PTPP and PTPPF. The solid PTPPF was a highly emissive material with a high quantum yield (Phi(F)) of 80%.
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