稀土-铬蓝黑R配合物体系的近红外发光研究  

Near-Infrared Luminescence of Yb 3^(+-)Chrome Blue-Black R Complex

作　　者：孟建新[1] 邓朝霞[1] 陈大志[1] 冯德雄[1] 

机构地区：[1]暨南大学化学系,广东广州510632

出　　处：《光谱学与光谱分析》2004年第5期582-584,共3页Spectroscopy and Spectral Analysis

基　　金：广东省自然科学基金 (项目批准号 :0 1 0 380 )资助项目

摘　　要：研究了金属指示剂铬蓝黑R对Yb3 + 的近红外发光的敏化作用。结果表明 ,在中性乙醇溶液中 ,铬蓝黑R和Yb3 + 离子可形成配比为 2∶1的配合物。配合物的形成可猝灭配体铬蓝黑R的荧光 ,同时使Yb3 +离子的荧光得到显著增强。表现出配体向Yb3 + 离子传能的机理。在一定条件下 ,配合物体系中Yb3 + 离子的发光强度与Yb3 + 离子的浓度成正比 ,同时其他低浓度稀土离子的存在不会影响Yb3 + 离子的发光 ,显示出近红外发光技术在单一稀土分析中良好的应用前景。In the present work, sensitized near-infrared fluorescence from Yb3+-chrome blue-black R (CBR) complex was studied. It was found that Yb3+ forms 1:2 complex with CBR in natural ethanol solution. The visible fluorescence from CBR was quenched when the complex forms, while the near-infrared fluorescence from Yb3+ was greatly enhanced. A mechanism in which CBR absorbs excitation light and transfers its energy to Yb3+ ions was suggested. Near-infrared fluorescence intensity of Yb3+ is proportional to its concentration under the experimental condition, and was not disturbed by the addition of a small amount of other lanthanide ions, which indicate that near-infrared fluorometric analysis should be promising in the determination of single langthanide ions.

关 键 词：稀土 铬蓝黑R 配合物体系 近红外发光光谱 荧光敏化作用 镱 

分 类 号：O614.346[理学—无机化学]