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Fluorescence quenching effect of metal ions for

机译:金属离子对固体膜中含

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摘要

The fluorescence quenching effect of the conjugated polymers P1 and P2 (the molecular recognitions are twisted 2,2'-bipyridine (bpy) and planar 1,10-phenanthrolin (phen), respectively) films upon the addition of metal ions has been studied. And the results showed that P2 exhibited stronger fluorescence quenching ability upon the addition of both transition metal ions and main group metal ions compared with that of P1. The 20 deg twist angle between the two consecutive pyridine rings of bpy unit in the P1 main chain is the reason for the weaker fluorescence quenching ability compared with P2, in which the planar phen unit can chelate with metal ions relatively freely without the conformational transition. So P2 is a kind of material with better properties for solid film devices, such as sensors for metal ions recognition.
机译:研究了共轭聚合物P1和P2(分子识别分别为扭曲的2,2'-联吡啶(bpy)和平面的1,10-菲咯啉(phen))在添加金属离子后的荧光猝灭效果。结果表明,与P1相比,同时加入过渡金属离子和主族金属离子时,P2具有较强的荧光猝灭能力。 P1主链中bpy单元的两个连续吡啶环之间的20度扭转角是与P2相比较弱的荧光猝灭能力的原因,其中Phen平面单元可以相对自由地与金属离子螯合而没有构象过渡。因此,P2是一种对固态膜设备具有更好性能的材料,例如用于金属离子识别的传感器。

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