The effective incorporation of well-defined coordination spheres, multiple types of ligands (heteroleptic), and specific assembly modes in a given structure enables the fabrication of simplified coordinative supramolecular bio-mimics. Herein, we report the fabrication of a unique racemic macrocycle via association of metallosupramolecular helicates. A nickel ({Ni₄}) cluster-based supramolecular helicate, [Ni₈(PDA)₆(CDBA)₃(DMF)₂(H₂O)₄] (1) (PDA = 2,6-pyridinedicarboxylate, CDBA = 4,4′-carbonyldibenzoate, DMF = dimethylformamide), is successfully synthesized and fully characterized. Dimerization of right (P-) and left (M-) handed helicates of 1via the coordination of metalloligands, [Ni(PDA₂)]²⁻ affords {[Ni₈(PDA)₆(CDBA)₃(DMF)₄–Ni(PDA)₂]₂} (2), which can be a representative model of the coordinative helix–helix association of heteroleptic helicates. The solid-state structures of 1 and 2 show high and selective CO₂ uptake properties.

中文翻译：

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杂金属金属超分子螺旋结构的配位螺旋-螺旋缔合

在给定的结构中有效结合明确定义的配位球，多种类型的配体（杂合剂）和特定的组装模式可简化配位的超分子生物模拟物的制备。在本文中，我们报道了通过金属超分子螺旋结构缔合的独特外消旋大环的制造。基于镍（{Ni ₄ }）团簇的超分子螺旋酸盐[Ni ₈（PDA）₆（CDBA）₃（DMF）₂（H ₂ O）₄ ]（1）（PDA = 2,6-吡啶二羧酸盐，CDBA =成功合成了4,4'-羰基二苯甲酸酯（DMF =二甲基甲酰胺）并进行了充分表征。权利的二元化（P-）和左旋（M-）通过金属配体配位得到的1的螺旋结构，[Ni（PDA ₂）] ^2-产生{[Ni ₈（PDA）₆（CDBA）₃（DMF）₄ -Ni（PDA）₂ ] ₂ }（2），它可以是杂合螺旋线的协调螺旋-螺旋缔合的代表模型。1和2的固态结构显示出高的选择性CO ₂吸收特性。