Chen Yufeng, Li Shixiong, Liu Yubing, Shi Ping, Xu Shihua, Bin Yuejing
School of Mechanical and Resource Engineering, Wuzhou University, Guangxi, Wuzhou 543003, PR China.
Wuzhou Resource Recycling Engineering Technology Research Center, Guangxi, Wuzhou 543003, PR China.
ACS Omega. 2024 Apr 10;9(16):18429-18437. doi: 10.1021/acsomega.4c00431. eCollection 2024 Apr 23.
The mixed ligand 3-amino-1,2,4-triazole (Hatz) and terephthalic acid (Hpta) reacted with Zn(NO)·6HO to synthesize a three-dimensional binuclear Zn(II) metal-organic framework: {[Zn·(atz)·(pta)]·3HO} (). This has two different types of pores (4.5 × 4.5 Å, 5.7 × 5.7 Å). The crystalline could be prepared into nanomaterials () with particles of approximately 100 nm by a cell fragmentation apparatus. Compared with the solid-state luminescence of Hatz and Hpta, it was found that exhibited strong luminescence performance and significant red-shift phenomenon. Due to the decrease in electronegativity and rigidity of ligands, as well as the effect of ligand metal charge transfer (LMCT), the fluorescence lifetime and quantum yield of were 2.7241 ns and 3.02%, respectively. The maximum experimental adsorption capacity of could reach 125.52 mg/g, which was superior to the majority of MOF adsorbents under the optimal adsorption conditions (25 °C, pH = 7, and the adsorbent concentration is 0.2000 g/L). The thermodynamic analysis of adsorption showed that the adsorption of Cr(VI) by was a spontaneous (△ < 0) and exothermic (△ < 0) process. It could be found that was a bifunctional material with potential applications by comprehensive analysis of the fluorescence and adsorption Cr(VI) performance.
混合配体3-氨基-1,2,4-三唑（Hatz）和对苯二甲酸（Hpta）与Zn(NO)·6HO反应，合成了一种三维双核Zn(II)金属有机骨架：{[Zn·(atz)·(pta)]·3HO}（）。该骨架有两种不同类型的孔（4.5×4.5 Å，5.7×5.7 Å）。通过细胞破碎仪可将结晶体制备成粒径约为100 nm的纳米材料（）。与Hatz和Hpta的固态发光相比，发现该材料表现出强发光性能和明显的红移现象。由于配体的电负性和刚性降低，以及配体-金属电荷转移（LMCT）的作用，该材料的荧光寿命和量子产率分别为2.7241 ns和3.02%。在最佳吸附条件（25°C，pH = 7，吸附剂浓度为0.2000 g/L）下，该材料的最大实验吸附容量可达125.52 mg/g，优于大多数MOF吸附剂。吸附的热力学分析表明，该材料对Cr(VI)的吸附是一个自发（△<0）且放热（△<0）的过程。通过对荧光和吸附Cr(VI)性能的综合分析发现，该材料是一种具有潜在应用价值的双功能材料。
