α-cyclodrextin, exhibited fluorescent turn-ondetection of CN− in 100% aqueous media with the detection limit of 1.3 μM. The turn-on signal is the result of the conversion of the conjugated hemicyanine moiety to a cyano-hemicyanine group via the addition of the cyanide ion. Using paper sensor strips, naked eye detection of cyanide is possible down to 4.59 ng mm−2. Test strips based on compound 2 can
一种新型的荧光灯导通含有吲哚鎓盐作为选择性CN氰化物传感器-受体在2个步骤合成经由Sonogashira偶联和Knoevenagel反应。化合物2被开发为一种新的用于氰化物的荧光和比色传感器,具有通过将氰化物离子加到吲哚基团中的传感机制。重要的是,化合物之间的包合配合物2和α-cyclodrextin,表现出荧光接通检测CN的-在100%的含水介质与1.3μM的检测极限。开启信号是共轭半花菁部分通过以下方式转化为氰基-半花菁基团的结果:氰化物离子的添加。使用纸制传感器条,可以肉眼检测到4.59 ng mm -2的氰化物。基于化合物测试条2可以充当方便和有效的CN -测试的成套工具。
Influence of an electron-acceptor substituent type on the photophysical properties of unsymmetrically substituted diphenylacetylene
Unsymmetrically substituteddiphenylacetylene derivatives containing a different type of an electron-acceptor substituent were synthetized and studied using spectroscopic methods in order to establish the influence of electron affinity of substituent on the photo physics of donor-acceptor pairs. Spectral and photophysical properties were studied in 14 solvents (non-polar, polar aprotic and protic)