强激光与粒子束, 2013, 25 (3): 615, 网络出版: 2013-03-05
咔唑类化合物的光致发光特性
Photoluminescence properties of carbazole compounds
咔唑 聚磷腈 热性能 固体荧光 荧光寿命 carbazole polyphosphazenes thermal property solid fluorescence fluorescence lifetime
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410 nm和393 nm, 其荧光强度相比于咔唑的最大波长420 nm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。
Abstract
Poly[bis(6-carbazolhexyloxy)]phosphazene with good thermal stability(about 290 ℃) and a low glass transition temperature(about 36 ℃) was synthesized with N-(6-hydroxyhexyl)carbazole 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 carbazole. The transient fluorescence spectra show that the linear backbone and the isolated dπ-pπ 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.
屈玉峰, 许良, 孙连来, 方瑜, 张庆军, 罗炫, 曹林洪, 刘红婕, 黄进, 蒋晓东. 咔唑类化合物的光致发光特性[J]. 强激光与粒子束, 2013, 25(3): 615. Qu Yufeng, Xu Liang, Sun Lianlai, Fang Yu, Zhang Qingjun, Luo Xuan, Cao Linhong, Liu Hongjie, Huang Jin, Jiang Xiaodong. Photoluminescence properties of carbazole compounds[J]. High Power Laser and Particle Beams, 2013, 25(3): 615.