Homochiral layered indium phosphonates: solvent modulation of morphology and chiral discrimination adsorption†

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-10 DOI:10.1039/D4DT03227F

Qian Teng, Song-Song Bao, Ran Gao and Li-Min Zheng

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Abstract

Assembling chiral coordination polymers into nano/microflower structures may improve their performance in applications such as chiral recognition and separation. In this study, we chose a chiral metal phosphonate system, i.e., In(NO₃)₃/R-, S-pempH₂ [pempH₂ = (1-phenylethylamino)methylphosphonic acid], and carried out systematic work on the self-assembly of this system in different alcohol/H₂O mixed solvents under solvothermal conditions. Enantiomeric compounds R-, S-[In₂(pempH)₂(μ₂-OH)₂(H₂O)₂](NO₃)₂ (R-, S-1) were obtained showing dense layered structures, but their morphologies varied with alcohol solvent. We obtained crystals of R-, S-1C in triethylene glycol (TEG)/H₂O mixed solvent and spiral microflowers of R-, S-1MF in isopropanol (IPA)/H₂O mixed solvent. Adsorption isotherms using enantiopure R-2-butanol and S-2-butanol as probe molecules revealed that compounds R-1MF and S-1MF had higher adsorption capacity compared to the crystalline sample and displayed enantioselective adsorption behaviour.

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同手性层状磷酸铟：形态的溶剂调节和手性识别吸附

将手性配位聚合物组装成纳米/微花结构可以提高其手性识别和分离等性能。本研究选择手性金属膦酸盐体系In(NO3)3/R-, s - pemp2 [pemp2 =（1-苯基乙胺）甲基膦酸]，在溶剂热条件下对该体系在不同醇/水混合溶剂中的自组装进行了系统研究。得到了R-， S-In₂（pempH）₂（μ₂- oh）₂（NO₃）₂（H₂O）₂（R-, S-1），它们具有致密的层状结构，但其形态随醇溶剂的不同而不同。在三甘醇(TEG)/H2O混合溶剂中得到R-， S-1C结晶，在异丙醇(IPA)/H2O混合溶剂中得到R-， S-1MF螺旋微花。以对映纯r -2-丁醇和s -2-丁醇为探针分子的吸附等温线表明，化合物R-1MF和S-1MF比晶体样品具有更高的吸附能力，并表现出对映选择性吸附行为。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.