Fluorescence quenching and enhancement of vitrifiable oligofluorenes end-capped with tetraphenylethene

	Fluorescence quenching and enhancement of vitrifiable oligofluorenes end-capped with tetraphenylethene
	Aldred MP ; Li C ; Zhang GF ; Gong WL ; Li ADQ ; Dai YF ; Ma DG ; Zhu MQ
刊名	journal of materials chemistry
	2012
卷号	22 期号:15 页码:7515-7528
关键词	AGGREGATION-INDUCED EMISSION RESTRICTED INTRAMOLECULAR ROTATION LIGHT-EMITTING-DIODES POLARIZED ELECTROLUMINESCENCE LIQUID-CRYSTALS BLUE EMISSION MAIN-CHAIN PHOTOLUMINESCENCE NANOPARTICLES POLYFLUORENE
ISSN号	0959-9428
通讯作者	li adq
中文摘要	we report the synthesis of novel amorphous fluorene-based fluorophores that have been end-capped with tetraphenylethene (tpe). although in the solid state the fluorophores show bright cyan fluorescence with high (68%) photoluminescence quantum efficiency (plqe), strong fluorescence quenching is observed in solution with low plqe values ranging from 0.3% to 2.1%. when the fluorophores were added to a 90% water-thf solvent mixture nanoparticles were formed, which was confirmed by dynamic light scattering (dls) and atomic force microscopy (afm). subsequent fluorescence measurements reveal that all the fluorophores exhibit aggregation induced emission (aie) with high plqe (41%). we have carried out a comparative study of 5 fluorene-based tpe materials (f(1-5)tpe), in which the fluorene core is extended, and investigated their thermal, optical, electrochemical and electroluminescence properties. from fluorescence quantum yield data we have discovered that the aie effect decreases as the fluorene core increases both in the nanoparticle and in the solid state. thermal analysis reveals that all fluorophores are amorphous with high thermal stabilities. potential application in solid state vapour sensing has been demonstrated using dichloromethane that shows "on" and "off" fluorescence behaviour. finally, organic light emitting diodes (oleds) have been fabricated with device configuration ito/pedot/f(1-5) tpe/tpbi/lif/al. the best oled device that incorporates f1-tpe as the emitter exhibits a turn-on voltage of 5.8 v, l-max = 1300 cd m(2), eta(p,max) = 1 lm w-1 and eta(c,max) = 2.6 cd a (1).
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000301957300057
公开日期	2013-06-30
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/48577]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Aldred MP,Li C,Zhang GF,et al. Fluorescence quenching and enhancement of vitrifiable oligofluorenes end-capped with tetraphenylethene[J]. journal of materials chemistry,2012,22(15):7515-7528.
APA	Aldred MP.,Li C.,Zhang GF.,Gong WL.,Li ADQ.,...&Zhu MQ.(2012).Fluorescence quenching and enhancement of vitrifiable oligofluorenes end-capped with tetraphenylethene.journal of materials chemistry,22(15),7515-7528.
MLA	Aldred MP,et al."Fluorescence quenching and enhancement of vitrifiable oligofluorenes end-capped with tetraphenylethene".journal of materials chemistry 22.15(2012):7515-7528.