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New squaraine-based chemosensors SQ1 and SQ2 functionalized with 2-picolyl units were first synthesized and used as highly selective and sensitive colorimetric and fluorometric dual-channel sensors for Cu 2+ -specific recognition in aqueous systems. Among a series of individual metal ions, only Cu 2+ could result in dramatic color changes. We also evaluated their capability of biological...
Cyclophanes based on imidazolium or benzimidazolium groups were synthesized as anion recognition motifs by quaternarization of the bridged imidazole or benzimidazole compounds with dibromides in acetonitrile under reflux with high dilution. X-Ray analysis showed that C-H...Br - hydrogen bonds connected the hydrogen atoms of the cationic imidazolium rings, the m-xylene ring and the spacer of...
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