Novel enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands, [Pb((R,R)-TBA)(H2O)]·1.7H2O and [Pb((S,S)-TBA)(H2O)]·1.7H2O [TBA = 1,3,5-triazin-2(1H)-one-4,6-bis(alanyl)],Materials Chemistry Frontiers

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Novel enantiomorphic Pb-coordination polymers dictated by the corresponding chiral ligands, [Pb((R,R)-TBA)(H2O)]·1.7H2O and [Pb((S,S)-TBA)(H2O)]·1.7H2O [TBA = 1,3,5-triazin-2(1H)-one-4,6-bis(alanyl)]
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-10-09 , DOI: 10.1039/d0qm00629g
Yunseung Kuk _{1,

2,

3,

4} , Kang Min Ok _{1,

2,

3,

4}

Affiliation

New enantiomorphic Pb-based metal–organic coordination polymers, i.e., [Pb((R,R)-TBA)(H₂O)]·1.7H₂O (R1) and [Pb((S,S)-TBA)(H₂O)]·1.7H₂O (S1) (TBA = 1,3,5-triazin-2(1H)-one-4,6-bis(alanyl)), have been successfully synthesized through solvothermal reactions with the aid of carefully designed corresponding chiral ligands. Compounds R1 and S1 crystallizing in the chiral space group, P2₁2₁2₁, reveal infinite unidimensional (1D) chain structures consisting of highly distortive PbO₇ polyhedra with lone pairs. Owing to the multiple hydrogen bonding interactions with adjacent TBA ligands, the overall structures of R1 and S1 reveal three-dimensional frameworks containing 1D channels along the a-axis. The title compounds exhibit high water and chemical stabilities in a wide pH range. The reported complexes not only reveal second-harmonic generation signals originating from the macroscopic noncentrosymmetric structures, but also show a selective adsorption of anionic organic dyes via a host–guest hydrogen bonding interaction. A detailed adsorption study of the chiral Pb complexes towards a complete removal of organic dyes and the effect of pH and particle size on the adsorption are discussed.

中文翻译：

由相应的手性配体[Pb（（R，R）-TBA）（H2O）]·1.7H2O和[Pb（（S，S）-TBA）（H2O）]·1.7H2O决定的新型对映体Pb配位聚合物[TBA = 1,3,5-triazin-2（1H）-one-4,6-bis（alanyl）]

新型对映体基于Pb的金属-有机配位聚合物，即[Pb（（R，R）-TBA）（H ₂ O）]·1.7H ₂ O（R1）和[Pb（（S，S）-TBA）（H ₂ O）]·1.7H ₂ O（S1）（TBA = 1,3,5-triazin-2（1 H）-one-4,6-bis（alanyl）），已通过溶剂热反应成功合成借助精心设计的相应手性配体。化合物R1和S1在手性空间基团P中结晶2 ₁ 2 ₁ 2 ₁揭示无限高一维（1D）链结构，该结构由高度变形的PbO ₇多面体与孤对组成。由于与相邻的TBA配体的多个氢键相互作用，R1和S1的整体结构揭示了沿a轴包含一维通道的三维骨架。标题化合物在很宽的pH范围内具有很高的水和化学稳定性。所报告的复合物不仅从宏观非中心对称结构揭示了二次谐波产生信号始发的，但也显示出阴离子有机染料的选择性吸附经由主客体氢键相互作用。讨论了手性Pb配合物对完全去除有机染料的详细吸附研究，以及pH和粒径对吸附的影响。

更新日期：2020-11-03

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