Functional heterometallic coordination polymers with metalloligands as tunable luminescent crystalline materials
作者:Dong-Ying Du、Jun-Sheng Qin、Cheng-Xin Sun、Xin-Long Wang、Shu-Ran Zhang、Ping Shen、Shun-Li Li、Zhong-Min Su、Ya-Qian Lan
DOI:10.1039/c2jm34661c
日期:——
Five heterometallic luminescent crystalline materials with the metalloligand, [Zn(HL)EuxTby(H2O)2][ZnBr4]·H2O (x = 1, y = 0, IFMC-21; x = 0.75, y = 0.25, IFMC-22; x = 0.5, y = 0.5, IFMC-23; x = 0.25, y = 0.75, IFMC-24; x = 0, y = 1, IFMC-25; H4L = 4,4′,4′′,4′′′-(2,2′,2′′,2′′′-(ethane-1,2-diylbis(azanetriyl))tetrakis(methylene)-tetrakis-(1H-benzo[d]imidazole-2,1-diyl))tetrakis(methylene)-tetrabenzoic acid; IFMC = Institute of Functional Material Chemistry), were prepared by the combination of hydrothermal and ionothermal methods for the first time. IFMC-21–25 can be obtained by introducing the desired Eu(III) and Tb(III) in the initial experiments. In these crystalline materials, the metalloligand Zn(HL) was connected by bi-lanthanide cores leading to a 2D sheet-structure and [ZnBr4]2− ions were distributed in the interspaces of the sheet. The luminescent properties of IFMC-21 to 25 were investigated and the results reveal that they exhibit characteristic Eu(III) and Tb(III) ion emissions, and the intensities of red and green arising from Eu(III) and Tb(III) emissions are shifted correspondingly by tuning the ratios of Eu(III) : Tb(III).
含有金属配体[Zn(HL)EuxTby(H2O)2][ZnBr4]-H2O的五种异金属发光晶体材料(x = 1,y = 0,IFMC-21;x = 0.75,y = 0.25,IFMC-22;x = 0.5,y = 0.5,IFMC-23;x = 0.25,y = 0.75,IFMC-24;x = 0,y = 1,IFMC-25;H4L = 4,4′,4′′,4′′′-(2,2′,2′′,2′′′-(乙烷-1,2-二基双(氮杂环丁三基))四(亚甲基)-四(1H-苯并[d]咪唑-2,1-二基))四(亚甲基)-四苯甲酸;IFMC = 功能材料化学研究所),首次采用水热法和离子热法相结合的方法制备。在初始实验中引入所需的 Eu(III)和 Tb(III)即可得到 IFMC-21-25。在这些晶体材料中,金属配体 Zn(HL) 由双镧系元素核连接,形成二维片状结构,[ZnBr4]2- 离子分布在片状结构的间隙中。对 IFMC-21 至 25 的发光特性进行了研究,结果表明它们表现出特征性的 Eu(III)和 Tb(III)离子发射,并且通过调整 Eu(III)和 Tb(III)的比例,Eu(III)和 Tb(III)发射的红色和绿色的强度会发生相应的变化:锑(III)的比率,红色和绿色的强度也会相应地发生变化。