在乙醇与水体积比为1:1的混合溶剂中将工业级染料耐晒蓝(FRL)用重结晶法提纯,提纯后的FRL用亚硝酸钠(NaNO2)进行重氮化,再与邻菲咯啉(Phen)进行偶合,得到改性耐晒蓝(FRLP)。FRLP与Cu^2+反应形成配合物。利用退色分光光度法结合等摩尔连续变化法测定Cu^2+与FRLP的组成,在pH6~9的条件下得到1:2的配合物。在pH8.8的B-R缓冲溶液中测得该配合物的摩尔吸光系数ε590nm为9.5×10^4L·mol^-1·cm^-1,表观稳定常数K表为5.12×10^12。研究了该配合物在紫外区的谱学性质,发现在200-305nm区域内其水溶液对紫外光具有很强的吸收作用。将该配合物与聚乙烯醇共混制成偏光膜,对紫外光同样具有较强的吸收作用,在可见光区最大吸收波长处与光轴平行时单片膜的透过率为45%~50%,两片垂直放置的膜在200-325nm范围内透过率为零,325-400nm范围内的平均透过率约10%。
The technical pure azo dye FRL was purified by recrystallization with the solvent composed of ethanol and water whose volume ratio is 1 : 1. The azo dye FRLP was obtained by coincidence reaction with phen after reoxidation reaction by purified FRL and sodium nitrite, which can be cooperated with Cu^2+. And at room temperature the UV-Vis spectrum of FRLP-Cu^2+ was studied. The form of the complex was confirmed by successive changing equal number of moles, which is in the B-R solution from pH 6 to pH 9, and the ratio of the complex(Cu^2+ : FRLP) is 1 : 2. In the B-R solution(pH 8. 8) the mol absorption pararneter of the complex is ε590nm=9. 5×10^4 L·mol^-1·cm^-1 , and the apparent stable constant is K=5.12×10^12. The property of ultraviolet band spectrum of FRLP-Cu^2+ was studied, showing that the aqueous solution of the complex can absorb the ultraviolet radiation strongly from 200 nm to 305 nm. The complex mixing with PVAL can also absorb ultraviolet radiation strongly. At the maxmium absorption wavelength in the visible zone and laid parallelly with the optical axis, the transmission of the single slice is 45%-50%, the transmission of two slices laid vertically is zero from 200 nm to 325 nm, and the averaged transmission from 325 nm to 400 nm is 10%.