Synthesis and optical properties of new isomeric core-fluorinated azo-containing bis(2-hydroxybenzaldehyde)s
作者:Andrii I. Kovalchuk、Yaroslav L. Kobzar、Ihor M. Tkachenko、Alexander L. Tolstov、Oleg V. Shekera、Valery V. Shevchenko
DOI:10.1016/j.molstruc.2018.07.041
日期:2018.12
ehyde) (ABA-II) have been obtained by diazotization of octafluorobiphenylene-based diamines with the further azo-coupling of the prepared diazonium salts with salicylaldehyde. The particular feature of them is a simultaneous combination of an electron-withdrawing (A) 4,4′-octafluorobiphenylene central unit and two kinds of reactive groups (hydroxyl and aldehyde) in its electron-donating (D) component
摘要 V 型偶氮发色团 3,3'-(2,2',3,3',5,5',6,6'-octafluorobiphenyl-4,4'-diyl)bis [oxy-4,1 -苯二氮-2,1-二基]}双(6-羟基苯甲醛) (ABA-I)和3,3'-(2,2',3,3',5,5',6,6'-八氟联苯-4,4'-二基)双[氧基-3,1-苯二氮烯-2,1-二基]}双(6-羟基苯甲醛)(ABA-II)已通过八氟联苯基二胺与进一步的偶氮重氮化获得-制备的重氮盐与水杨醛的偶联。它们的特点是在其给电子(D)组分中同时结合了吸电子(A) 4,4'-八氟联苯中心单元和两种反应基团(羟基和醛)。合成的偶氮发色团可以很好地溶解在各种有机溶剂中。所得化合物的结构已使用 1H、13C、19F NMR、FTIR 和 UV-vis 光谱表征。通过紫外光谱,研究了在不同极性和 pH 值的溶剂中的溶剂化变色和光异构特性。已经发现,A