摘要
聚二氯磷腈(PDCP)与N-(6-羟基己基)咔唑发生亲核取代,得到了热稳定性良好(约290℃)、玻璃化温度较低(约36℃)的光电导材料聚双(6-咔唑基己氧基)磷腈。稳态荧光光谱表明,N-(6-羟基己基)咔唑和聚双(6-咔唑基己氧基)磷腈的荧光发射最大波长分别在410nm和393nm,其荧光强度相比于咔唑的最大波长420nm依次减弱并发生蓝移;瞬态荧光光谱表明聚磷腈的线型主链结构和孤立的dπ-pπ杂化轨道体系导致其空间位阻增大,破坏了原有的共轭体系,使聚双(6-咔唑基己氧基)磷腈在不同发射波长下的荧光寿命普遍减小。
Poly[bis（6-carbazolhexyloxy）]phosphazene with good thermal stability（about 290 ~C） and a low glass transition temperature（about 36 ~C） was synthesized with N-（6 hydroxyhexyl）earbazole and linear polydichlorophosphazene. Steady state fluorescence spectra elucidated that the maximum fluorescence-emission wavelengths of carbazole, N-（6-hydroxyhexyl）carbazole and poly[bis（6-carbazolhexyloxy）] phosphazene are 420, 410, and 393 nm, respectively. The fluorescence intensity of N-（6- hydroxyhexyl）carbazole and poly[bis（6-carbazolhexyloxy）]phosphazene decreases orderly and has a blue-shift compared with car- bazole. The transient fluorescence spectra show that the linear backbone and the isolated dn-pn hybrid orbital of polyphosphazene might increase steric hindrance and disrupt the previous conjugate system, leading to decrease of the fluorescence lifetime of poly [bis（6-carbazolhexyloxy）]phosphazene at several emission wavelengths.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第3期615-619,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(60908023)
中物院科技发展基金项目(2010B0401055)
中物院创新基金项目(CX08201205)
关键词
咔唑
聚磷腈
热性能
固体荧光
荧光寿命
carbazole
polyphosphazenes
thermal property
solid fluorescence
fluorescence lifetime
