A Cl? anion-responsive luminescent Eu3+ complex with a chiral tripod: ligand substituent effects on ternary complex stoichiometry and anion sensing selectivity
作者:Yumiko Kataoka、Dharam Paul、Hiroyuki Miyake、Satoshi Shinoda、Hiroshi Tsukube
DOI:10.1039/b703944a
日期:——
O-mixed donor tripods was prepared for luminescent Eu3+ complexes, in which the soft quinoline nitrogen, tertiary amine nitrogen, and hard amide oxygen donors were cooperatively involved. The mixed donor tripods formed more stable 1 : 1 complexes with Eu(NO3)3, La(NO3)3 and Tb(NO3)3 than the corresponding N4 donor tripods, and their Eu3+ complexes particularly exhibited anion-responsive luminescence properties
为发光的Eu3 +配合物制备了一系列新的N3,O混合供体三脚架,其中软喹啉氮,叔胺氮和硬酰胺氧供体共同参与。混合的供体三脚架与相应的N4供体三脚架形成了更稳定的Eu(NO3)3,La(NO3)3和Tb(NO3)3 1:1配合物,并且它们的Eu3 +配合物特别显示出阴离子响应发光特性。NMR,UV和发光光谱表征表明,三脚架骨架上的-CH3取代显着改变了“三脚架-Eu3 +-阴离子”三元配合物的优选化学计量,并给出了阴离子依赖性dependent发光。尽管二取代的三脚架优选与Eu(NO3)3和其他盐形成不发光的2:1(三脚架:Eu3 +)络合物,但它形成了发光的1:1。1种与EuCl3形成的络合物。因此,这种三脚架提供了Cl-选择性发光的增强,而肉眼很容易观察到这种增强。