一种锑桥连的四核铥嵌入锑钨酸盐及其发光性质

A Sb-bridging tetra-Tm^III encapsulated tetrameric antimonotungstate and its luminescence properties

在酸性水溶液中Na9[B-α-SbW9O33]·19.5H2O,SbCl 3,Tm(NO 3)3·6H2O和盐酸二甲胺反应,合成一例锑桥连的四核铥嵌入四聚锑钨酸盐[H2N(CH3)2]8Na6H8{[[Tm4(H2O)6Sb6O4](B-α-SbW10O37)2(B-α-SbW8O31)2}·24H2O(1).该簇合物的四聚阴离子是由两个二缺位[B-α-SbW10O37]11-片段、两个四缺位[B-α-SbW8O31]11-片段和两个[Tm2(H2O)3 Sb3O2]11+簇组成.发光性质研究表明在353 nm紫外光激发下,1的发射光谱在450 nm处显示出一个特征发射峰,该发射峰归属于铥离子1D2→3F4跃迁.它相关的发光性能参数如色度坐标、色纯度、主波长和色温分别为(0.1843,0.1350)、71.69%、470 nm和4471 K.这些数据表明1有可能作为蓝色发光体应用于白光发光二极管领域.

A Sb-bridging tetra-Tm III encapsulated tetrameric antimonotungstate[H2N(CH3)2]8Na6H8{[[Tm4(H2O)6Sb6O4](B-α-SbW10O37)2(B-α-SbW8O31)2}·24H2O(1)was triumphantly isolated by reaction of Na9[B-α-SbW9O33]·19.5H2O,SbCl 3,Tm(NO 3)3·6H2O and dimethylamine hydrochloride in acidic aqueous solution.Its tetrameric polyoxoanion consists of two divacant[B-α-SbW10O37]11-segments,two tetravacant[B-α-SbW8O31]11-segments and two[Tm2(H2O)3 Sb3O2]11+clusters.The luminescence property of 1 demonstrates that the characteristic emission peak at 450 nm can be assigned to the 1D2→3F4 transition of the Tm 3+ion under excitation of the UV light of 353 nm.Its relevant luminescence performance parameters such as the chromaticity coordinate,the color purity,the dominant wavelength and the correlated color temperature are(0.1843,0.1350),71.69%,470 nm and 4471 K,respectively.This observation indicates that 1 may be a blue emission emitter for the application of white LEDs.