Le Thi Hong Hai, Nguyen Hien, Trinh Hong Duong, Nguyen Hoang Ninh, Nguyen Nhat Khanh, Van Meervelt Luc
Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam.
Institute of Natural Sciences, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam.
Acta Crystallogr E Crystallogr Commun. 2024 Oct 24;80(Pt 11):1210-1216. doi: 10.1107/S2056989024010302. eCollection 2024 Oct 1.
Two new zinc(II) complexes, tri-ethyl-ammonium di-chlorido-[2-(4-nitro-phen-yl)-4-phenyl-quinolin-8-olato]zinc(II), (CHN){Zn(CHNO)Cl] (), and bis-(tri-ethyl-ammonium) {2,2'-[1,4-phenyl-enebis(nitrilo-methyl-idyne)]diphenolato}bis-[di-chlorido-zinc(II)], (CHN)[Zn(CHNO)Cl] (), were synthesized and their structures were determined using ESI-MS spectrometry, H NMR spectroscopy, and single-crystal X-ray diffraction. The results showed that the ligands 2-(4-nitro-phen-yl)-4-phenyl-quinolin-8-ol () and ,'-bis-(2-hy-droxy-benzyl-idene)benzene-1,4-di-amine () were deprotonated by tri-ethyl-amine, forming the counter-ion EtNH, which inter-acts an N-H⋯O hydrogen bond with the ligand. The Zn atoms have a distorted trigonal-pyramidal () and distorted tetra-hedral () geometries with a coord-ination number of four, coordinating with the ligands N and O atoms. The N atoms coordinating with Zn correspond to the heterocyclic nitro-gen for the ligand, while for the ligand, it is the nitro-gen of the imine (CH=N). The crystal packing of is characterized by C-H⋯π inter-actions, while that of by C-H⋯Cl inter-actions. The emission spectra showed that complex exhibits green fluorescence in the solid state with a small band-gap energy, and the complex does exhibit non-fluorescence.
合成了两种新型锌（II）配合物，三乙铵二氯代-[2-（4-硝基苯基）-4-苯基喹啉-8-醇根]锌（II），(C₂H₅)₃NH{Zn(C₉H₆NO₃)Cl₂} (1)，以及双（三乙铵）{2,2'-[1,4-亚苯基双（亚氨基亚甲基）]二酚根}双[二氯代锌（II）]，(C₂H₅)₃NH₂[Zn(C₁₇H₁₄N₂O₂)Cl₂] (2)，并通过电喷雾质谱（ESI-MS）、¹H核磁共振光谱（¹H NMR）和单晶X射线衍射确定了它们的结构。结果表明，配体2-（4-硝基苯基）-4-苯基喹啉-8-醇（L₁）和2,2'-双（2-羟基苄叉基）苯-1,4-二胺（L₂）被三乙胺去质子化，形成抗衡离子Et₃NH⁺，其与配体通过N-H⋯O氢键相互作用。锌原子具有扭曲的三角锥（1）和扭曲的四面体（2）几何构型，配位数为4，与配体的N和O原子配位。与锌配位的N原子对于L₁配体而言对应于杂环氮，而对于L₂配体，它是亚胺（CH=N）的氮。1的晶体堆积以C-H⋯π相互作用为特征，而2的晶体堆积以C-H⋯Cl相互作用为特征。发射光谱表明，1配合物在固态下表现出绿色荧光，带隙能量小，而2配合物确实不发荧光。
