改性灰D(GDSA)与Cu^(2+)离子形成配合物的紫外-可见光谱及偏光性能

UV-vis spectrum and polarized light property of GDSA-Cu(Ⅱ) metal complexes

将直接染料灰D(GD)重氮化后与磺基水杨酸(SSA)偶合得到一种三偶氮染料(GDSA),研究了GDSA与Cu2+离子配合系统的紫外-可见光谱,发现Cu2+与GDSA在pH=4.6的条件下可形成配合物[Cu(Ⅱ)(GDSA)],其表观稳定常数K表=6.2×105。将该配合物与聚乙烯醇共混制成偏光膜,研究了膜的光谱吸收特性,结果表明,掺有[Cu(Ⅱ)(GDSA)]的膜的偏光性能明显优于掺有GD的膜,偏光度>60%的波长区间由GD膜的100nm(550~650nm)增加到320nm(350~670nm),并使200~280nm范围紫外光的透过率<5%。

Three AZO dye GDSA was achieved by coupling reaction with SSA and GD that diazotizated by sodium nitrite. The UV-vis spectrum of GDSA-Cu^2＋ was studied. In the pH=4.6, it was found that the complex [Cu （Ⅱ） （GDSA）] formed, and its apparent steady constant was K表=6.2 × 10^5. The Polarized light films were obtained by PVAL mixed the complex. The absorption spectra of the films were researched. The results showed, the [Cu（ Ⅱ ） （GDSA）] membrane is obviously better than GD in the function of light membrane, that is to say, above 60% wave-length zone of the polarized light degree was increased to 320nm（350 to 670nm） by GD 100nm（550 to 650nm）, and Within the wave-length of 200 to 280nm, the transmittance of ultraviolet light was less than 5%.