Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China.
Dalton Trans. 2021 Mar 2;50(8):2915-2927. doi: 10.1039/d0dt04037a.
Triangular silver(i) and copper(i) 3,5-diethyl-4-nitropyrazolates (abbreviated as [Ag(denpz)]3 or Ag3pz3, and [Cu(denpz)]3 or Cu3pz3), as well as their adducts with dibenzothiophene (DBT), 4,6-dimethyldibenzothiophene (DMDBT) and benzothiophene (BT), have been prepared and characterized by a series of techniques. X-ray analyses show that these adducts are stabilized by MS, MC contacts and ππ stacking interactions. NMR measurements and theoretical calculations indicate that the intensity of interaction between the metal complexes and dibenzothiophenes follows the trend: Ag3pz3-DMDBT > Ag3pz3-DBT > Cu3pz3-DMDBT > Cu3pz3-DBT, which can be understood on the basis of a weak interaction between π-acid (Ag3pz3 or Cu3pz3) and π-base (DBT/DMDBT). Both complexes show good adsorptive ability and reusability toward the removal of DBT and DMDBT from model oil (n-octane), with the maximum adsorption capacity at room temperature being 39 mg S (DMDBT) per g Cu3pz3, 34 mg S (DMDBT) per g Ag3pz3, 40 mg S (DBT) per g Cu3pz3, 36 mg S (DBT) per g Ag3pz3, respectively. Compared to Ag3pz3, Cu3pz3 exhibits higher adsorptive capacities for DBT/DMDBT, which has been attributed to its lower molecular mass.
三角形的银（I）和铜（I）3,5-二乙基-4-硝基吡唑（缩写为[Ag（denpz）]3或Ag3pz3和[Cu（denpz）]3或Cu3pz3），以及它们与二苯并噻吩（DBT）、4,6-二甲基二苯并噻吩（DMDBT）和苯并噻吩（BT）的加合物，已经通过一系列技术进行了制备和表征。X 射线分析表明，这些加合物通过 MS、MC 接触和ππ堆积相互作用稳定。NMR 测量和理论计算表明，金属配合物与二苯并噻吩之间的相互作用强度遵循以下趋势：Ag3pz3-DMDBT > Ag3pz3-DBT > Cu3pz3-DMDBT > Cu3pz3-DBT，可以根据π-酸（Ag3pz3 或 Cu3pz3）和π-碱（DBT/DMDBT）之间的弱相互作用来理解。这两种配合物都表现出良好的吸附能力和可重复使用性，能够从模型油（正辛烷）中去除 DBT 和 DMDBT，在室温下的最大吸附容量分别为 39 mg S（DMDBT）/g Cu3pz3、34 mg S（DMDBT）/g Ag3pz3、40 mg S（DBT）/g Cu3pz3、36 mg S（DBT）/g Ag3pz3。与 Ag3pz3 相比，Cu3pz3 对 DBT/DMDBT 的吸附容量更高，这归因于其较低的分子量。
