The position effect of nitro group on the anion sensing performance of benzimidazole–naphthalimide derivatives
作者:Zhongzhen Tian、Dongmei Li
DOI:10.1007/s11164-020-04228-2
日期:2020.10
Six benzimidazole–naphthalimide naked-eye probes containing nitrobenzoquinone have been designed and synthesized to study the positional effect of –NO2 group on their anion recognition abilities in DMSO. The push–pull character of –NO2 rendered the anion-binding site hydrazinium –NH more acidic and thus easier for hydrogen bonds or deprotonation. So disubstituted isomer responded to F−, CN−, AcO− and
Benzimidazole-isoquinolinone functioned thiourea for selective and reversible recognition of fluoride ion
作者:Dongmei Li、ZhongzhenTian
DOI:10.1016/j.molstruc.2019.127631
日期:2020.4
dual-channel properties: UV–vis absorption red-shift and fluorescence turn-off upon reacting with F−. More importantly, the F− induced visual and spectroscopic changes were fully reversible upon addingHSO4-.And the new probes could realize the distinguish recognition of F− and OH− by adding over 40 equivalents OH−. The detection limits of new probes were 0.6 nM. The recognition mechanism deduced from the 1H