4-Hexylresorcinol-derived hydroxyazobenzocrown ethers as chromoionophores
摘要:
The synthesis of novel chromoionophoric azobenzocrowns with a hydroxyl group in the para position to the azo moiety has been described. The interactions of the obtained colored macrocycles with selected alkali and alkaline earth metal cations were investigated in acetonitrile by UV-vis spectroscopy. (C) 2009 Elsevier Ltd. All rights reserved.
The synthesis of novel chromoionophoric azobenzocrowns with a hydroxyl group in the para position to the azo moiety has been described. The interactions of the obtained colored macrocycles with selected alkali and alkaline earth metal cations were investigated in acetonitrile by UV-vis spectroscopy. (C) 2009 Elsevier Ltd. All rights reserved.
Fluorescence of p-hydroxyazobenzocrowns – Tautomeric equilibrium effect
properties of a series of para-hydroxyazobenzocrowns, including three novel compounds, were investigated using UV–Vis absorption and emission spectroscopy. This study presents, for the first time, determined quantum yield (QY) values for macrocycles of this category, ranging between 0.122 and 0.195. The highest values were obtained for crowns bearing two phenyl substituents in benzene rings. The impact
使用紫外-可见吸收和发射光谱研究了一系列对羟基偶氮苯冠(包括三种新型化合物)的光谱性质。这项研究首次提出了此类大环化合物的确定量子产率 (QY) 值,范围在 0.122 至 0.195 之间。苯环中带有两个苯基取代基的冠获得了最高值。考虑到偶氮酚⇄醌-腙互变异构平衡,研究了芳环取代基和大环尺寸对对羟基偶氮苯冠冠光谱表征( 1 H NMR和FTIR)的影响。已测定了基态和激发态的对羟基偶氮苯并冠的偶极矩。实验结果与理论研究之间建立了一致性。