4‐HOArCH=NArY and XArCH=NArOH‐4′, and the second set consists of 2‐HOArCH=NArY and XArCH=NArOH‐2′. Their ultraviolet absorption spectra were measured and investigated. A very interesting phenomenon was observed by analyzing their wave number νmax (cm−1) of longest wavelength maximum λmax (nm) of ultraviolet. Compared with the change regularity of the νmax of XArCH=NArY (where the X and Y excluded OH), the
合成了两组包含4(或4')-OH和2(或2')-OH的双芳基席夫碱。第一组由4-H
OArCH = NArY和XArCH = NArOH-4'组成,第二组由2-H
OArCH = NArY和XArCH = NArO
H-2'组成。测量并研究了它们的紫外线吸收光谱。通过分析它们的紫外线的最长波长最大值λmax(nm)的波数νmax(cm -1),观察到非常有趣的现象。与XArCH = NArY的νmax的变化规律相比(X和Y排除了OH),4'-位置羟基(4'-OH)和2'-位置羟基(2'-OH)具有异常的性能。详细信息如下:4'-OH对νmax产生额外的红移XArCH = NArO
H-2'(λmax减小)的最大值,而2'-OH对XArCH = NArO
H-2'的νmax贡献了额外的蓝移(λmax减小)。此外,对于2-H
OArCH = NArY和XArCH = NArO
H-2',所有2-OH和2'-