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Hu X, Ding F, Xiong R, An Y, Feng X, Song J, Zhou L, Li P, Chen C. Highly Effective H 2/D 2 Separation within the Stable Cu(I)Cu(II)-BTC: The Effect of Cu(I) Structure on Quantum Sieving. ACS APPLIED MATERIALS & INTERFACES 2023; 15:3941-3952. [PMID: 36623259 DOI: 10.1021/acsami.2c18221] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Realizing ideal deuterium separation from isotopic mixtures remains a daunting challenge because of their almost identical sizes, shapes, and physicochemical properties. Using the quantum sieving effect in porous materials with suitable pore size and open metal sites (OMSs) enables efficient hydrogen isotope separation. Herein, synthetic HKUST-1-derived microporous mixed-valence Cu(I)Cu(II)-BTC (BTC = benzene-1,3,5-tricarboxylate), featuring a unique network of distinct Cu(I) and Cu(II) coordination sites, can remarkably boost the D2/H2 isotope separation, which has a high selectivity (SD2/H2) of 37.9 at 30 K, in comparison with HKUST-1 and other porous materials. Density functional theory (DFT) calculations indicate that the introduction of Cu(I) macrocycles in the framework decreases the pore size and further leads to relatively enhanced interaction of H2/D2 molecules on Cu(II) sites. The significantly enhanced selectivity of Cu(I)Cu(II)-BTC at 30 K can be mainly attributed to the synergistic effect of kinetic quantum sieving (KQS) and chemical affinity quantum sieving (CAQS). The results reveal that Cu(I) OMSs exhibit counterintuitive behaviors and play a crucial role in tuning quantum sieving without a complex structural design, which provides a deeper insight into quantum sieving mechanisms and a new strategy for the intelligent design of highly efficient isotope systems.
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Affiliation(s)
- Xiaoyu Hu
- Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Fengyun Ding
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, P. R. China
| | - Renjin Xiong
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Yongtao An
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Xingwen Feng
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Jiangfeng Song
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Linsen Zhou
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Peilong Li
- Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, P. R. China
| | - Changlun Chen
- Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, P. R. China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, P. R. China
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Chen A, Benoit DM, Scribano Y, Nauts A, Lauvergnat D. Smolyak Algorithm Adapted to a System-Bath Separation: Application to an Encapsulated Molecule with Large-Amplitude Motions. J Chem Theory Comput 2022; 18:4366-4372. [PMID: 35584357 DOI: 10.1021/acs.jctc.2c00108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Smolyak algorithm adapted to system-bath separation is proposed for rigorous quantum simulations. This technique combines a sparse grid method with the system-bath concept in a specific configuration without limitations on the form of the Hamiltonian, thus achieving a highly efficient convergence of the excitation transitions for the "system" part. Our approach provides a general way to overcome the perennial convergence problem for the standard Smolyak algorithm and enables the simulation of floppy molecules with more than a hundred degrees of freedom. The efficiency of the present method is illustrated on the simulation of H2 caged in an sII clathrate hydrate including two kinds of cage modes. The transition energies are converged by increasing the number of normal modes of water molecules. Our results confirm the triplet splittings of both translational and rotational (j = 1) transitions of the H2 molecule. Furthermore, they show a slight increase of the translational transitions with respect to the ones in a rigid cage.
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Affiliation(s)
- Ahai Chen
- Maison de la Simulation, UVSQ, CNRS, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.,Institut de Chimie Physique, UMR-CNRS 8000, Université Paris-Saclay, CNRS, 91405 Orsay, France
| | - David M Benoit
- E.A. Milne Centre for Astrophysics, The University of Hull, Cottingham Road, Kingston upon Hull HU6 7RX, U.K
| | - Yohann Scribano
- Laboratoire Univers et Particules de Montpellier, UMR-CNRS 5299, Université de Montpellier, 34095 Montpellier Cedex, France
| | - André Nauts
- Institut de Chimie Physique, UMR-CNRS 8000, Université Paris-Saclay, CNRS, 91405 Orsay, France.,Institute of Condensed Matter and Nanosciences (NAPS), Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium
| | - David Lauvergnat
- Institut de Chimie Physique, UMR-CNRS 8000, Université Paris-Saclay, CNRS, 91405 Orsay, France
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de Lara-Castells MP, Mitrushchenkov AO. Mini Review: Quantum Confinement of Atomic and Molecular Clusters in Carbon Nanotubes. Front Chem 2021; 9:796890. [PMID: 34957050 PMCID: PMC8704106 DOI: 10.3389/fchem.2021.796890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/08/2021] [Indexed: 11/16/2022] Open
Abstract
We overview our recent developments on a computational approach addressing quantum confinement of light atomic and molecular clusters (made of atomic helium and molecular hydrogen) in carbon nanotubes. We outline a multi-scale first-principles approach, based on density functional theory (DFT)-based symmetry-adapted perturbation theory, allowing an accurate characterization of the dispersion-dominated particle–nanotube interaction. Next, we describe a wave-function-based method, allowing rigorous fully coupled quantum calculations of the pseudo-nuclear bound states. The approach is illustrated by showing the transition from molecular aggregation to quasi-one-dimensional condensed matter systems of molecular deuterium and hydrogen as well as atomic 4He, as case studies. Finally, we present a perspective on future-oriented mixed approaches combining, e.g., orbital-free helium density functional theory (He-DFT), machine-learning parameterizations, with wave-function-based descriptions.
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