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

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

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

Language: Английский

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Research progress on the construction and applications of metal-organic frameworks in chromatographic stationary phases

Chinese Journal of Chromatography, Journal Year: 2023, Volume and Issue: 41(10), P. 879 - 890

Published: Oct. 1, 2023

Metal-organic frameworks (MOFs) are a class of porous crystalline materials composed metal centers or clusters assembled with organic ligands. These possess excellent properties, such as large surface areas, high porosities, uniform pore sizes, and diverse structures. Thus, MOFs have been widely applied in various fields, including catalysis, adsorption, sensing, sample pretreatment, chromatographic separation. The applications stationary phases for separation analysis attracted considerable attention from the research community recent years. Compared traditional phases, mesoporous silica, nanoparticles, layers, flexible tunable sizes structures, thereby enabling precise control over their intermolecular interactions. Furthermore, wide range functional ligands topologies could potentially facilitate complex samples. unique advantages render highly suitable constructing novel phases.This article focuses primarily on construction methods provides an overview latest advancements several techniques performance liquid chromatography (HPLC), gas (GC), capillary electrochromatography (CEC). existing preparation MOFs-based classified evaluated. HPLC mainly include filling, precursor-doped polymerization, post-modification. GC predominantly situ growth, static coating, dynamic coating. CEC can be categorized into packed columns, monolithic open-tubular columns. (OT-CEC) offers numerous advantages, more convenient method, enhanced compatibility media, higher efficiency. Consequently, OT-CEC has emerged important method investigating CEC. Several physical covalent attachment, electrostatic interactions developed modification extensive studies conducted to optimize OT-CEC. However, present certain limitations. Therefore, selection appropriate MOFs, optimization methods, examination different modes become focus intensive research.This review also summarizes analytical targets (e. g., chiral small molecules, biomacromolecules, nonchiral molecules) corresponding effects achieved using phases. Finally, future focusing development media discussed. Overall, this valuable reference rational practical advanced

Language: Английский

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A chiral supramolecular MOF for enantiomer separation

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 8(6), P. 363 - 363

Published: May 24, 2023

Language: Английский

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Highly stable chiral Cr(iii)-based metal–organic frameworks for enantioadsorption separation of aromatic alcohols

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(7), P. 1998 - 2006

Published: Jan. 1, 2024

Highly stable Cr-HMOFs Cr-HMOF-1 and Cr-HMOF-2 were synthesized for the first time directly using enantiomerically pure chiral ligands, showing excellent enantioselective separation performance aromatic alcohol racemates.

Language: Английский

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