New 2,2′:6′,2′′-terpyridines as colorimetric and fluorescent sensors for fluoride ions
New 2,2′:6′,2′′-terpyridines as colorimetric and fluorescent sensors for fluoride ions
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DOI：
10.1039/c3ra45143g
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发表时间：
2014
期刊：
影响因子：
3.9
通讯作者：
Qian‐Yong Cao;Ming Li;Li Zhou;Zhong-Wei Wang
中科院分区：
文献类型：
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作者：
Qian‐Yong Cao;Ming Li;Li Zhou;Zhong-Wei Wang
通过将4′-（4-氨基苯基）-2,2′：6′，2′-三联吡啶与水杨醛或4-羟基苯甲醛偶联，制备了两个新的2,2′：6′，2′-三联吡啶受体1和2。在有机溶剂中，这两种受体对F−的比色和荧光反应优于其他阴离子。此外，在1中发现了强的分子内N⋯H-O氢键，这归因于其对F−的结合能力弱于2，以及激发态分子内质子转移（ESIPT）发射猝灭过程。
Two new 2,2′:6′,2′′-terpyridine receptors bearing phenol groups, 1 and 2, have been prepared by coupling 4′-(4-aminophenyl)-2,2′:6′,2′′-terpyridine with salicylaldehyde or 4-hydroxybenzaldehyde. Both receptors show colorimetric and fluorescent response to F− over other anions in organic solvent. In addition, a strong intramolecular N⋯H–O hydrogen bond was found in 1, which is attributed to its weaker binding ability to F− than that of 2, and an Excited-State Intramolecular Proton Transfer (ESIPT) emission quenching process.