The recognition of anions using delayed lanthanide luminescence: The use of Tb(iii) based urea functionalised cyclen complexes
作者:Cidália Maria Gomes dos Santos、Thorfinnur Gunnlaugsson
DOI:10.1039/b902955a
日期:——
A cyclen based lanthanide luminescent sensor, Tb.1, has been developed by taking advantage of a combination of hydrogen bonding and f-metal ion coordination binding sites for anionic species. Analysis of the ground state, the emission from the singlet and the Tb(III) excited states clearly show the ability of the Tb(III) complex to signal the presence of anions in CH3CN, through multiple binding interactions consisting of hydrogen bonding and metal coordination. The delayed lanthanide luminescence from the Tb(III) diaryl–urea complex was found to be significantly enhanced only upon recognition of H2PO4−, at the same time as displaying good selectivity over other competitive anions, such as CH3COO−.
一种基于环烯的镧系元素荧光传感器Tb.1被开发出来,利用了氢键和f金属离子配位结合位点的组合,以探测阴离子。对基态的分析、单态和Tb(III)激发态的发射清晰地表明,Tb(III)络合物能够通过多重结合相互作用(包括氢键和金属配位)在CH3CN中信号化阴离子的存在。经过认知H2PO4−后,Tb(III)二芳基氨基甲酸酯复合物的延迟镧系荧光被发现显著增强,同时在选择性上对其他竞争阴离子(如CH3COO−)表现出良好的选择性。