Abstract
研究了纳米银对分别以水、重水、乙醇和二甲基甲酰胺为溶剂的铕．吡啶．2，6-二羧酸（Eu（III）DPA）配合物溶液的荧光增强效应．研究结果表明，Eu（III）DPA溶液中加入纳米银，电偶极跃迁（^5Do→^7F2）和磁偶极跃迁（^5D0→^7F1）发射强度先增强而后逐渐下降，^5Do→^7F2的荧光增强效率高于^5Do→^7F1的荧光增强效率，在乙醇溶剂中纳米银对Eu（III）DPA溶液的荧光增强效应最大．在水或重水或乙醇溶剂中，Eu（III）DPA的不对称率明显提高，而在二甲基甲酰胺溶剂中几乎不变．分析认为，纳米银对Eu（III）DPA溶液荧光的影响与纳米银表面等离子体共振与激发态荧光中心强烈耦合以及表面等离子体再吸收有关．
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