Synthesis and evaluation of thiosemicarbazones functionalized with furyl moieties as new chemosensors for anion recognition
作者:Luis E. Santos-Figueroa、María E. Moragues、M. Manuela M. Raposo、Rosa M. F. Batista、Susana P. G. Costa、R. Cristina M. Ferreira、Félix Sancenón、Ramón Martínez-Máñez、José Vicente Ros-Lis、Juan Soto
DOI:10.1039/c2ob26200b
日期:——
to the thiosemicarbazone moiety. Fluoride, chloride, bromide, iodide, dihydrogen phosphate, hydrogen sulphate, nitrate, acetate and cyanide anions were used in recognition studies. From these anions, only sensing features were seen for fluoride, cyanide, acetate and dihydrogen phosphate. Two clearly different chromo-fluorogenic behaviours were observed: (i) a small shift of the absorption band due to
合成了一个含呋喃基的杂环硫代半碳环素族染料(3a–f和4),并进行了表征,并对其反应进行了表征。乙腈在选择的阴离子存在下进行了研究。3a-f和4的乙腈溶液在335-396 nm范围内显示吸收带,该吸收带由附加到硫代半碳环素部分的杂环系统的电子供体或受体强度调节。氟化物,氯化物,溴化物,碘化物,磷酸二氢盐,硫酸氢,硝酸根,乙酸根和氰根阴离子用于识别研究。从这些阴离子中,仅观察到氟化物,氰化物,乙酸盐和磷酸二氢盐的感测特征。观察到两个明显不同的发色荧光行为:(i)由于阴离子与硫脲质子的配位,吸收带发生了很小的移动;以及(ii)由于去质子化而出现了新的红移带。对于后一种效果,观察到溶液的颜色从浅黄色变为紫色。荧光研究也与在UV / Vis滴定中观察到的不同效果相一致。在这种情况下,氢键相互作用通过发射谱带的增强是可见的,而去质子化则引起了新的红移发射的出现。使用HypSpec V1.1.18程序