镉基杂化晶体的介电相变和蓝白光致发光双重特性  

Dual Functions of Phase-Transition Dielectric and Blue-White Photoluminescence in a Hybrid Crystal(bempy)_(2)CdBr_(4)

作　　者：吴婷[1] 丁坤 伦蒙蒙 张铁[1] 张毅[1] 付大伟[1] WU Ting;DING Kun;LUN Meng-Meng;ZHANG Tie;ZHANG Yi;FU Da-Wei(Ordered Matter Science Research Center,Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学,分子铁电科学与应用江苏省重点实验室,有序物质科学研究中心,南京211189

出　　处：《无机化学学报》2022年第10期2083-2090,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21673038)资助。

摘　　要：通过采用容易无序的胺,我们合成了2种有机无机杂化晶体,分别为基于bempy(bempy=1⁃甲基⁃1⁃溴乙基吡咯烷阳离子)的溴盐化合物(bempy)Br(1)和镉基溴化物(bempy)_(2)CdBr_(4)(2),并对其结构相变、介电相变和蓝白荧光进行了详细的表征分析。化合物1在测试温度范围内未观察到可逆相变,化合物2为高温介电相变,介电和差示扫描量热法测试表征其相变温度为357 K。同时,化合物1和2均具备蓝白光致发光特性,荧光测试表明,化合物1和2分别在538 nm和547、750 nm处存在发射峰。化合物2具备介电相变和蓝白光致发光的双重特性。We have successfully synthesized two organic⁃inorganic hybrid crystals,which are(bempy)Br(1)and(bempy)_(2)CdBr_(4)(2),based on bempy(bempy=1⁃bromoethyl⁃1⁃methylpyrrolidinium)by employing easily disordered amines.Structural phase transitions analysis,dielectric phase transition measurements,and blue⁃white fluorescence spectroscopy measurements were performed on them.It is notable that,no reversible phase transition was observed in compound 1,and compound 2 exhibited high⁃temperature dielectric phase transition anomalies at around 357 K by differential scanning calorimetry and dielectric measurements.Both compounds showed blue⁃white photolumi⁃nescence with one emission peak at 538 nm for compound 1 and two emission peaks at 547 and 750 nm for com⁃pound 2.Significantly,compound 2 possesses dual functions of dielectric phase transition and blue⁃white photolumi⁃nescence.CCDC:2155028,1;2155029,2.

关 键 词：相变 光致发光 介电 有机无机杂化 

分 类 号：O614.242[理学—无机化学]