不同结晶相的三(8-羟基喹啉)铝的研究进展  

Progress for Different Crystalline Phases of Tris(8-Hydroxylquinoline) Aluminum

作　　者：胡斌[1] 温晓帆[1] 庄卫东[1] 刘荣辉[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司,北京100088

出　　处：《稀有金属》2011年第2期292-300,共9页Chinese Journal of Rare Metals

基　　金：国家重点研究发展计划(2006CB601104);国家自然科学基金资助项目(50902011)

摘　　要：综述了三(8-羟基喹啉)铝(Alq3)的5种结晶相(α,β,γ,δ和ε)的制备方法以及这五相之间的相互转变。阐述了Alq3的两种异构体(fac-Alq3和mer-Alq3)的相互转变和存在条件,研究表明:由于室温下fac-Alq3在溶液中很不稳定,所以很难被检测到,其只能在低温下存在,并随着温度的升高逐渐向mer-Alq3转变。归纳了Alq3的5种结晶相的不同结晶形式和晶体结构。并对比了这5种结晶相在固态和溶液中的光致发光光谱,发现不同结晶相的荧光峰值波长不同,并分布在466～515 nm之间。最后简述了Alq3合成过程中的化学老化机制:在水和氧气存在的情况下,Alq3易水解进而发生氧化缩合,因此在制备Alq3的过程中需要在无水无氧的条件下进行。The synthesis and phase transformation of five crystalline phases（α,β,γ,δ and ε） of Alq3 were summarized.The existing conditions and mutual transformation for Alq3 which could occur in two different geometrical isomers（fac-Alq3 and mer-Alq3） were described.The results showed that fac-Alq3 was a difficult species to capture for its relatively short lifetime in solution which could only exist at low temperature and progressively transformed into mer-Alq3 with increasing the temperature.Different crystalline form and crystal structure of five crystalline phases（α,β,γ,δ and ε） of Alq3 were summarized.And different phases in solid state and solution were contrasted by photoluminescence which reveal that solid samples of different phases of Alq3 exhibit substantial differences in emission band position,the maximum of the emission band varies from 466 to 515 nm.At last,the chemical degradation mechanism of Alq3 was reviewed.In the presence of water and oxygen,Alq3 would easily hydrolyze and then take place oxygen-facilitated condensation.So the synthesis of Alq3 should be carried out under anhydrous and anaerobic conditions.

关 键 词：三(8-羟基喹啉)铝 异构体 结晶 相 老化 

分 类 号：O627.31[理学—有机化学]