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Heterochiral or Homochiral Self‐Assembly: Mercury(II), Cadmium(II), and Spontaneous Resolution of Silver(I) Complexes Derived from a Racemic Bis(pyridyl) Ligand
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2020-02-17 , DOI: 10.1002/ejic.201901311
Chao Huang 1 , Yong-Jie Liu 1 , Ya-Ting Chen 1 , Dong-Mei Chen 1 , Bi-Xue Zhu 1
Affiliation  

A novel racemic bis(pyridyl) ligand (racL) was designed and synthesized by Schiff condensation reaction. Five complexes, [Hg2(LR)(LS)Cl4]·2CH3CH2OH (1), [Cd(LR)(LS)Cl2]n (2), {[Cd(LR)(LS)SO4(H2O)]·11H2O}n (3), {[Ag(LR)2]NO3·CH3CN}n (4a) and {[Ag(LS)2]NO3·CH3CN}n (4b) have been synthesized and characterized. The different geometric features of complexes 14 were determined by single‐crystal X‐ray diffraction. The crystal structures show that the self‐assembly with racemic ligands can lead to homochiral or heterochiral complexes, through self‐recognition or self‐discrimination of the ligand units. Complex 1 exists as a 26‐membered binuclear heterochiral macrocycle. Complexes 2 and 3 form 1D mesomeric looped chain coordination polymers with different heterochiral self‐assembly types. More interestingly, two novel 2D homochiral coordination polymers 4a and 4b were obtained as racemic conglomerates via spontaneous resolution. Furthermore, the thermal stabilities and luminescence properties of complexes 14 were investigated.

中文翻译:

杂环或同手性的自组装:汞(II),镉(II)和自消旋双(吡啶基)配体衍生的银(I)配合物的自发拆分

通过席夫缩合反应设计并合成了一种新型外消旋双(吡啶基)配体(rac - L)。五个络合物,[Hg 2L R)(L S)Cl 4 ] · 2CH 3 CH 2 OH(1),[Cd(L R)(L S)Cl 2 ] n2),{[Cd(L R)(L S)SO 4(H 2 O)] · 11H 2 O} n3)合成并表征了{[Ag(L R2 ] NO 3 · CH 3 CN} n4a)和{[Ag(L S2 ] NO 3 · CH 3 CN} n4b) 。复合物的不同的几何特征1 - 4由单晶X射线衍射确定。晶体结构表明,具有外消旋配体的自组装可通过对配体单元的自识别或自识别而导致同手性或异手性复合物。复合物1以26元双核异手性大环存在。配合物23形成具有不同杂手性自组装类型的1D介晶环链配位聚合物。更有趣的是,通过自发拆分,获得了两种新型的2D同手性配位聚合物4a4b,为消旋团聚体。此外,复合物的热稳定性和发光性质1 - 4 被调查了。
更新日期:2020-02-17
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