Approach to Enantiomer Recognition during Adsorption by Different Adsorption Rates on Zeotype Borophosphate LiCu2[BP2O8(OH)2] with Spontaneously Emerged Chirality

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-02-02 DOI:10.1021/acs.langmuir.4c04695

Zhanna D. Uteeva, Elina R. Mansurova, Yuliya F. Sharafutdinova, Diana O. Bagdanova, Marat R. Agliullin, Timur A. Mukhametzyanov, Vladimir Yu Guskov

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引用次数: 0

Abstract

Zeotype borophosphates are porous adsorbents with a 3D open framework. The unique feature of borophosphates is noncentrosymmetric or even chiral structures. The chirality emerged as an asymmetrical arrangement of atoms in crystals and can be referred to the supramolecular, not molecular, chirality hierarchy level. In this work, the zeotype copper borophosphate LiCu₂[BP₂O₈(OH)₂] was studied as a promising adsorbent for enantiomer separation. LiCu₂[BP₂O₈(OH)₂] has a rare feature: without any external source of chirality, crystals with only [CD(−)284] and [CD(−)760] Cotton effects are synthesized. Tryptophan enantiomer adsorption on LiCu₂[BP₂O₈(OH)₂] was studied. At almost all tryptophan concentrations, enantioselectivity was observed. At nonequilibrium conditions, enantioselectivity coefficients were higher than at adsorption equilibrium. In some cases, chiral recognition was not observed at equilibrium but occurred before equilibrium. In a nonequilibrium area of amount of adsorbed substance vs adsorption time curve, a phenomenon of very high enantioselectivity was discovered. The enantioselectivity coefficient values were 3–5, and even 11.8. Such extremely high enantioselectivity values were caused by the nontrivial kinetic curve for l-tryptophan. A far from the equilibrium, a plateau was observed on the curve. At the end of the plateau, the maximal enantioselectivity was observed. This mechanism of enantioselectivity enhancement can be useful for chromatographic separations, chemical sensors, and catalysts.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).