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Role of the Auxiliary Ligand in the Spontaneous Resolution of Enantiomers in Three-Dimensional Coordination Polymers
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2021-04-29 , DOI: 10.1021/acs.inorgchem.1c00608
Hui-Jun Chen 1 , Lu Xu 1 , Man-Ting Chen 1 , Li-Rong Lin 1 , Gui-Lin Zhuang 2 , La-Sheng Long 1 , Lan-Sun Zheng 1
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Four pairs of chiral 3D coordination polymers (CPs), [Zn2(BDC)(lac)(DMF)]·guest (2) (H2BDC = benzene dicarboxylic acid; H2lac = lactic acid; guest = 1.5DMF + i-PrOH), [Co2(BDC)(lac)(DMF)]·guest (3) (guest = DMF + 2H2O), [Fe4(BDC)3(lac)2(DMF)2](CO3)·guest (4) (guest = DMF + 2H2O), and {Zn11(BPDC)6(lac)6[NH2(CH3)2]2}·guest (H2BPDC = 3,3′-biphenyldicarboxylic acid; guest = 6DMF + 18H2O) (5), are prepared through the reactions of racemic lactic acid (rac-H2lac) with different metal ions and auxiliary ligands. Structural analyses and DFT calculations reveal that forming more and stronger coordination bonds between the auxiliary ligand and metal ions is more conducive to the spontaneous resolution of enantiomers in 3D CPs than simply increasing the entropy of the auxiliary ligand itself.

中文翻译:

辅助配体在三维配位聚合物中对映异构体自发拆分中的作用

四对手性3D配位聚合物(CP),[Zn 2(BDC)(lac)(DMF)]·来宾(2)(H 2 BDC =苯二甲酸; H 2 lac =乳酸;客体= 1.5DMF + i -PrOH),[Co 2(BDC)(lac)(DMF)]·客体(3)(客体= DMF + 2H 2 O),[Fe 4(BDC)3(lac)2(DMF)2 ]( CO 3)·客体(4)(客体= DMF + 2H 2 O)和{Zn 11(BPDC)6(lac)6 [NH 2(CH 32] 2 }·客体(H 2 BPDC = 3,3'-联苯二甲酸;客体= 6DMF + 18H 2 O)(5)是通过外消旋乳酸(rac -H 2 lac)与不同金属离子的反应制备的和辅助配体。结构分析和DFT计算表明,与简单增加辅助配体本身的熵相比,在辅助配体与金属离子之间形成更多和更强的配位键更有助于3D CP中对映体的自发拆分。
更新日期:2021-05-17
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