摘要
以2-苯基吡啶(ppy)为主配体,N,N-二苯基-4-(4-苯基-5-(吡啶-2-基)-4H-1,2,4-三唑-3-基)苯胺(DPPTA)为辅助配体,合成了阳离子型铱(Ⅲ)配合物[(ppy)2Ir(DPPTA)]PF6.该配合物具有高对比性的力致发光变色性能,最初从CH_(2)Cl_(2)溶液中析出制得时发绿光,最大发射波长(λem,max)为525 nm,经研磨后发黄光(em,max=576 nm),经CH_(2)Cl_(2)熏蒸后发黄绿光(λem,max=531 nm).研磨和熏蒸所致的发光变色可多次循环,2种状态下各自的发光颜色稳定,λem,max相差高达45 nm.[(ppy)_(2)Ir(DPPTA)]PF_(6)的发光变色性能对受力和有机溶剂熏蒸敏感,但对温度变化并不敏感,这一点与很多已报道过的力致发光变色材料不一样.
A cationic iridium(Ⅲ)complex[(ppy)2 Ir(DPPTA)]PF6 was synthesized by using 2-phenylpyridine(ppy)as main ligand and N,N-diphenyl-4-(4-phenyl-5-(pyridin-2-yl)-4 H-1,2,4-triazol-3-yl)aniline(DPPTA)as ancillary ligand.This complex showed mechanochromic luminescence with high contrast.When it was just obtained via precipitating from CH_(2)Cl_(2) solution,it emitted green light and the maximum emission wavelength(λem,max)was 525 nm.It emitted yellow light(λem,max=576 nm)after it was ground,then it emitted yellow-green light(λem,max=531 nm)when it was fumed by CH_(2)Cl_(2).The color changes caused by grinding and fumigation can be repeated for many times with high stability,the difference of theλem,max in two states was as high as 45 nm.The emissive color of[(ppy)_(2) Ir(DPPTA)]PF_(6) was sensitive to mechanical force and being fumed by organic solvents,but it was not sensitive to temperature changes,which was different from many reported mechanochromic luminescence materials.
作者
任孟然
孙日勇
陈秋宏
唐怀军
王羽虹
李浩聚
李相华
王凯民
REN Meng-ran;SUN Ri-yong;CHEN Qiu-hong;TANG Huai-jun;WANG Yu-hong;LI Hao-ju;LI Xiang-hua;WANG Kai-min(School of Chemistry and Environment,Key Laboratory of Green-Chemistry Materials in University of Yunnan Province,Yunnan Minzu University,Kunming 650500,Yunnan,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第3期546-552,共7页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(21762049)
广东省高性能与功能高分子材料重点实验室开放基金(20190009).
作者简介
任孟然(1996−),女,河南人,硕士生,主要研究发光材料.E-mail:renmengrankevery@sina.com;通信作者:唐怀军(1974−),男,湖南人,博士,教授,主要研究发光材料合成及应用.E-mail:tanghuaijun@sohu.com.
