Christensen Joseph A, Fletcher James T
Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE, 68178, U.S.A.
Tetrahedron Lett. 2014 Aug 1;55(33):4612-4615. doi: 10.1016/j.tetlet.2014.06.059.
A series of ethynylarene compounds containing 2-(1,2,3-triazol-4-yl)pyridine chelating units were studied as fluorescent chemosensors for metal cations in aqueous solution. Analogs possessing two chelating units bridged by either 1,4-diethynylphenyl or 2,7-diethynylnaphthyl subunits displayed large hypsochromic shifts coupled with signal intensification when exposed to increasing concentrations of Ni(II), a unique response among 22 metal cation analytes. This response was shown to be reversible, and is proposed to derive from disruption of aggregate formation upon Ni(II) binding at the peripheral chelating units.
一系列含有2-(1,2,3-三唑-4-基)吡啶螯合单元的乙炔基芳烃化合物被研究作为水溶液中金属阳离子的荧光化学传感器。具有由1,4-二乙炔基苯基或2,7-二乙炔基萘基亚基桥连的两个螯合单元的类似物,在暴露于浓度不断增加的Ni(II)时,显示出大的紫移以及信号增强,这是22种金属阳离子分析物中的独特响应。该响应被证明是可逆的,并提出是由于Ni(II)在外围螯合单元处结合时聚集体形成的破坏所致。