综述了三(8-羟基喹啉)铝(Alq3)的5种结晶相(α,β,γ,δ,和ε)的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-Alg3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.
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