Two metal-organic frameworks (MOFs), namely {[Zn₃(L)₂(4,4′-bipy)(DMF)₂]·2H₂O}_n (1) and {[Cd₃(L)₂(4,4′-bipy)(H₂O)₂].2DMF}_n (2) (4,4′-bipy = 4,4′-bipyridine, DMF = N,N-dimethylformamide), were solvothermally prepared based on a rigid tricarboxylic acid 3-(3,5-dicarboxylphenyl)-5-(3-carboxylphenyl)-1-H-1,2,4-triazole (H₃L). X-ray crystallographic analysis reveals that 1 and 2 are isostructural and both emit blue light. Notably, 1 exhibits good luminescent sensing for nitro-containing compounds and Fe³⁺ ions. In addition, the emission colors of 1 can be tuned from yellow to white and to blue by encapsulating different mole ratios of Eu³⁺ and Tb³⁺ ions and changing the excitation wavelength. A white emission with the Commission International de l’Eclairage (CIE) coordinates of (0.331, 0.337), which fall within the white-light region, emerges upon excitation at 340 nm.

两个金属有机骨架（MOF），即{[Zn ₃（L）₂（4,4'-bipy）（DMF）₂ ]·2H ₂ O} _n （1）和{[Cd ₃（L）₂（在此基础上溶剂热制备4,4'-联吡啶（H ₂ O）₂ ] .2DMF} _n （2）（4,4'-联吡啶= 4,4'-联吡啶，DMF = N，N-二甲基甲酰胺）。刚性三元羧酸3-（3,5-二羧基苯基）-5-（3-羧基苯基）-1-H-1,2,4-三唑（H ₃ L）。X射线晶体学分析表明1和2是同构的，并且都发出蓝光。尤其，图1显示出对含硝基化合物和Fe ³⁺离子的良好发光感测。另外，通过包封不同摩尔比的Eu ³⁺和Tb ³⁺离子并改变激发波长，可以将1的发射颜色从黄色变成白色，然后变成蓝色。在340 nm处激发时，出现落在白光区域内的，具有国际照明委员会（CIE）坐标（0.331，0.337）的白色发射。