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Haouas M, Falaise C, Leclerc N, Floquet S, Cadot E. NMR spectroscopy to study cyclodextrin-based host-guest assemblies with polynuclear clusters. Dalton Trans 2023; 52:13467-13481. [PMID: 37691564 DOI: 10.1039/d3dt02367b] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Natural cyclodextrin (CD) macrocycles are known to form diverse inclusion complexes with a wide variety of organic molecules, but recent work has revealed that inorganic clusters also form multicomponent supramolecular complexes and edifices. Such molecular assemblies exhibit a high degree of organization in solution governed by various chemical processes including molecular recognition, host-guest attraction, hydrophobic repulsion, or chaotropic effect. Nuclear magnetic resonance (NMR) spectroscopy is one of the most efficient and practical analytical techniques to characterize the nature, the strength and the mechanism of these interactions in solution. This review provides a brief overview on recent examples of the contribution of NMR to the characterization of hybrid systems in solution based on CD with polynuclear clusters, including polyoxometalates (POMs), metallic clusters and hydroborate clusters. The focus will be first on using 1H (and 13C) NMR of the host, i.e., CD, to identify the nature of the interactions and measure their strength. Then, 2D NMR methods will be illustrated by DOSY as a means of highlighting the clustering phenomena, and by NOESY/ROESY to evidence the spatial proximity and contact within the supramolecular assemblies. Finally, other NMR nuclei will be selected to probe the inorganic part as a guest molecule. Attention will be paid to classical host-guest complexes Cluster@CD, but also to hierarchical multi-scale, multi-component assemblies such as Cluster@CD@Cluster.
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Affiliation(s)
- Mohamed Haouas
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 45 avenue des Etats-Unis, 78000, Versailles, France.
| | - Clément Falaise
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 45 avenue des Etats-Unis, 78000, Versailles, France.
| | - Nathalie Leclerc
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 45 avenue des Etats-Unis, 78000, Versailles, France.
| | - Sébastien Floquet
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 45 avenue des Etats-Unis, 78000, Versailles, France.
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles (ILV), Université Paris-Saclay, UVSQ, CNRS, 45 avenue des Etats-Unis, 78000, Versailles, France.
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Chen X, Zhang G, Li B, Wu L. An integrated giant polyoxometalate complex for photothermally enhanced catalytic oxidation. SCIENCE ADVANCES 2021; 7:eabf8413. [PMID: 34301598 PMCID: PMC8302132 DOI: 10.1126/sciadv.abf8413] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 06/04/2021] [Indexed: 05/11/2023]
Abstract
A strategy integrating near infrared (NIR) photothermal and catalytic effects within one active center beyond ultraviolet and visible light is proposed without the combination of separated photothermal transformation components. A giant polyoxomolybdate, which has high NIR photothermal conversion efficiency, is selected as the model catalyst, while a cationic β-cyclodextrin is used to cover its negatively charged surface electrostatically. Under NIR light radiation, the designed catalyst increases catalytic activity of cyclohexene oxidation under O2 atmosphere in water. The conversion reaches about pentaploid of the reaction without NIR radiation. By excluding heating effect from the external heater at the same temperature, about twice as much enhancement, which can be attributed to the sole photothermal action, is still observed. While the catalytic center is shielded by the organic porous layer, the surface cavity allows the integrated catalyst to conduct a selective catalysis by screening the molecules in size over the surface channel.
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Affiliation(s)
- Xiaofei Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Guohua Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Bao Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
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Asif HM, Bi RB, Tariq M, Shaheen N, Khalid M, Nadeem M, Ali Khan M, Ansari TM. Synthesis and Characterization of Polyvanadium and Heteropoly-Tungsten Based Inorganic Wells Dawson Polyoxometalates Hybrids. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621030025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Li X, Chi XL, Xiao DR, Shen J. Helical Coordination Polymers Based on Keggin-type POMs and N-donor Ligand. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Xu Li
- State Key Laboratory of Mechanical Transmission; College of Materials Science and Engineering; Chongqing University; 400044 Chongqing P. R. China
| | - Xiao-Lin Chi
- College of Chemistry and Chemical Engineering; Southwest University; 400715 Chongqing P. R. China
| | - Dong-Rong Xiao
- College of Chemistry and Chemical Engineering; Southwest University; 400715 Chongqing P. R. China
| | - Jun Shen
- State Key Laboratory of Mechanical Transmission; College of Materials Science and Engineering; Chongqing University; 400044 Chongqing P. R. China
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Ibrahim M, Mbomekallé IM, de Oliveira P, Baksi A, Carter AB, Peng Y, Bergfeldt T, Malik S, Anson CE. Syntheses, Crystal Structure, Electrocatalytic, and Magnetic Properties of the Monolanthanide-Containing Germanotungstates [Ln(H 2O) n GeW 11O 39] 5- (Ln = Dy, Er, n = 4,3). ACS OMEGA 2019; 4:21873-21882. [PMID: 31891065 PMCID: PMC6933596 DOI: 10.1021/acsomega.9b02846] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Two monolanthanide-containing polyanions based on monolacunary Keggin germanotungstates [Ln(H2O) n GeW11O39]5- (Ln = Dy, Er, n = 4,3) have been synthesized in simple one-pot synthetic procedure and compositionally characterized in solid state by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Electronic absorption and emission spectra of the title compounds in solution were also studied. The [DyIII(H2O)4GeW11O39]5- Keggin POM exhibits a slow relaxation of magnetization. The cyclic voltammetry measurements and mass spectrometry were carried out to check the stability of the compounds in solution. Both polyanions prove efficient in the electrocatalytic reduction of nitrite. To our knowledge, this observation establishes the first example of electrocatalysis of nitrite reduction by all inorganic monolanthanide-containing germanotungstates family.
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Affiliation(s)
- Masooma Ibrahim
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Israël M. Mbomekallé
- Equipe
d'Electrochimie et Photo-électrochimie, Laboratoire de
Chimie
Physique, Université Paris-Sud, UMR 8000, CNRS-Université
Paris Saclay, Orsay F-91405, France
| | - Pedro de Oliveira
- Equipe
d'Electrochimie et Photo-électrochimie, Laboratoire de
Chimie
Physique, Université Paris-Sud, UMR 8000, CNRS-Université
Paris Saclay, Orsay F-91405, France
| | - Ananya Baksi
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Anthony B. Carter
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology, Engesserstrasse
15, 76128 Karlsruhe, Germany
- School
of Chemistry University of Southampton University Road, SO17 1BJ Southampton, U.K.
| | - Yan Peng
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology, Engesserstrasse
15, 76128 Karlsruhe, Germany
| | - Thomas Bergfeldt
- Institutes
for Applied Materials (IAM-AWP), Karlsruhe
Institute of Technology (KIT), 76131 Karlsruhe, Germany
| | - Sharali Malik
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christopher E. Anson
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology, Engesserstrasse
15, 76128 Karlsruhe, Germany
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Stuckart M, Monakhov KY. Polyoxometalates as components of supramolecular assemblies. Chem Sci 2019; 10:4364-4376. [PMID: 31057763 PMCID: PMC6482875 DOI: 10.1039/c9sc00979e] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 03/13/2019] [Indexed: 01/09/2023] Open
Abstract
The non-covalent interaction of polyoxometalates (POMs) with inorganic- or organic-based moieties affords hybrid assemblies with specific physicochemical properties that are of high interest for both fundamental and applied studies, including the discovery of conceptually new compounds and unveiling the impact of their intra-supramolecular relationships on the fields of catalysis, molecular electronics, energy storage and medicine. This minireview summarises the recent advances in the synthetic strategies towards the formation of such non-covalent POM-loaded assemblies, shedding light on their key properties and the currently investigated applications. Four main emerging categories according to the nature of the conjugate are described: (i) POMs in metal-organic frameworks, (ii) POMs merged with cationic metal complexes, (iii) architectures generated with solely POM units and (iv) POMs assembled with organic molecular networks.
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Affiliation(s)
- Maria Stuckart
- Institut für Anorganische Chemie , RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany.,Jülich-Aachen Research Alliance (JARA-FIT) , Peter Grünberg Institute (PGI-6) , Forschungszentrum Jülich GmbH , Wilhelm-Johnen-Straße , 52425 Jülich , Germany
| | - Kirill Yu Monakhov
- Leibniz Institute of Surface Engineering (IOM) , Permoserstr. 15 , 04318 Leipzig , Germany .
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