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Silina YE. One-step electrodeposited hybrid nanofilms in amperometric biosensor development. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2424-2443. [PMID: 38592715 DOI: 10.1039/d4ay00290c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
This review summarizes recent developments in amperometric biosensors, based on one-step electrodeposited organic-inorganic hybrid layers, used for analysis of low molecular weight compounds. The factors affecting self-assembly of one-step electrodeposited films, methods for verifying their composition, advantages, limitations and approaches affecting the electroanalytical performance of amperometric biosensors based on organic-inorganic hybrid layers were systemized. Moreover, issues related to the formation of one-step organic-inorganic hybrid functional layers with different structures in biosensors produced under the same electrodeposition parameters are discussed. The systemized dependencies can support the preliminary choice of functional sensing layers with architectures tuned for specific biotechnology and life science applications. Finally, the capabilities of one-step electrodeposition of organic-inorganic hybrid functional films beyond amperometric biosensors were highlighted.
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Affiliation(s)
- Yuliya E Silina
- Institute of Biochemistry, Saarland University, Campus B 2.2, Room 317, Saarbrücken, Germany.
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2
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Simons J, Hazra N, Petrunin AV, Crassous JJ, Richtering W, Hohenschutz M. Nonionic Microgels Adapt to Ionic Guest Molecules: Superchaotropic Nanoions. ACS NANO 2024; 18:7546-7557. [PMID: 38417118 DOI: 10.1021/acsnano.3c12357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
Microgels are commonly applied as solute carriers, where the size, density, and functionality of the microgels depend on solute binding. As representatives for ionic solutes with high affinity for the microgel, we study here the effect of superchaotropic Keggin polyoxometalates (POMs) PW12O403- (PW) and SiW12O404- (SiW) on the aqueous swelling and internal structure of nonionic poly(N-isopropylacrylamide) (pNiPAM) microgels by light scattering techniques and small-angle X-ray scattering. Due to their weak hydration, these POMs bind spontaneously to the microgels at millimolar concentrations. The microgels thus become charged and swell at low POM concentration, surprisingly without strongly increasing the volume phase transition temperature, and deswell at higher POM concentration. The swelling arises because of the osmotic pressure of dissociated counterions of the POMs, while the deswelling is due to POMs acting as physical cross-links in the microgels under screened electrostatics in NaCl or excess POM solution. This swelling/deswelling transition is sharper for PW than for SiW related to the lower charge density, weaker hydration, and stronger binding of PW. The POMs elicit qualitatively and quantitatively different swelling effects from ionic surfactants and classical salts. Moreover, the network softness and topology govern the swelling response upon POM binding. The softer the microgel, the stronger is the swelling response, while, inside the microgel, regions of high polymer density swell/contract more upon electric charging/cross-linking than regions with low polymer density. POM binding thus enables fine-tuning of microgel properties and highlights the role of network topology in microgel swelling. Because POMs decompose at an alkaline pH, these POM/microgel systems also exhibit pH-responsive swelling in addition to the typical temperature responsiveness of pNiPAM microgels.
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Affiliation(s)
- Jasmin Simons
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
| | - Nabanita Hazra
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
| | - Alexander V Petrunin
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
| | - Jérôme J Crassous
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
| | - Max Hohenschutz
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, DE-52074 Aachen, Germany
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3
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Li R, Wang Y, Zeng F, Si C, Zhang D, Xu W, Shi J. Advances in Polyoxometalates as Electron Mediators for Photocatalytic Dye Degradation. Int J Mol Sci 2023; 24:15244. [PMID: 37894924 PMCID: PMC10607072 DOI: 10.3390/ijms242015244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/06/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
The increasing concerns over the environment and the growing demand for sustainable water treatment technologies have sparked substantial interest in the field of photocatalytic dye removal. Polyoxometalates (POMs), known for their intricate metal-oxygen anion clusters, have received considerable attention due to their versatile structures, compositions, and efficient facilitation of photo-induced electron transfers. This paper provides an overview of the ongoing research progress in the realm of photocatalytic dye degradation utilizing POMs and their derivatives. The details encompass the compositions of catalysts, catalytic efficacy, and light absorption propensities, and the photocatalytic mechanisms inherent to POM-based materials for dye degradation are exhaustively expounded upon. This review not only contributes to a better understanding of the potential of POM-based materials in photocatalytic dye degradation, but also presents the advancements and future prospects in this domain of environmental remediation.
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Affiliation(s)
| | | | | | | | - Dan Zhang
- Key Laboratory of Biomass Materials Science and Technology of Jilin Province, Beihua University, Binjiang East Road, Jilin 132013, China; (R.L.); (Y.W.); (F.Z.); (C.S.); (W.X.)
| | | | - Junyou Shi
- Key Laboratory of Biomass Materials Science and Technology of Jilin Province, Beihua University, Binjiang East Road, Jilin 132013, China; (R.L.); (Y.W.); (F.Z.); (C.S.); (W.X.)
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4
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Vlasyuk D, Łyszczek R, Podkościelna B, Puszka A, Hnatejko Z, Stankevič M, Głuchowska H. Luminescent Hybrid BPA.DA-NVP@Eu 2L 3 Materials: In Situ Synthesis, Spectroscopic, Thermal, and Mechanical Characterization. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6509. [PMID: 37834646 PMCID: PMC10573574 DOI: 10.3390/ma16196509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/26/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023]
Abstract
A series of homogeneous hybrid BPA.DA-NVP@Eu2L3 materials were obtained through an in situ approach where the luminescent dopant was formed at the molecular level with different contents (0.1; 0.2; 0.5; 1; and 2% by weight). A Europium(III) complex (Eu2L3) with quinoline-2,4-dicarboxylic acid was applied as a luminescence additive while a polymer matrix consisted of a combination of bisphenol A diacrylate (BPA.DA) and N-vinylpyrrolidone (NVP) monomers. Synthesis steps and the final materials were monitored by NMR and Fourier transform infrared spectroscopy (FTIR). The emission, excitation spectra, lifetime, and quantum yield measurements were applied for the determination of the photophysical characteristics. The thermal and mechanical properties of the obtained materials were tested via thermal analysis methods (TG/DTG/DSC and TG-FTIR) in air and nitrogen atmospheres, dynamic mechanical analysis (DMA), and hardness and bending measurements. Generally, even a small addition of the metal complex component causes changes in the thermal, mechanical, and luminescent properties. Hybrid materials with a greater europium complex content are characterized by a lower stiffness and hardness while the heterogeneity and the flexibility of the samples increase. A very small amount of an Eu2L3 admixture (0.1% wt.) in a hybrid material causes an emission in the red spectral range and the luminescence intensity was reached for the BPA-DA-NVP@1%Eu2L3 material. These materials may be potentially used in chemical sensing, security systems, and protective coatings against UV.
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Affiliation(s)
- Dmytro Vlasyuk
- Department of General and Coordination Chemistry and Crystallography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. C. Skłodowskiej Sq. 2, 20-031 Lublin, Poland;
| | - Renata Łyszczek
- Department of General and Coordination Chemistry and Crystallography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. C. Skłodowskiej Sq. 2, 20-031 Lublin, Poland;
| | - Beata Podkościelna
- Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, Gliniana 33, 20-614 Lublin, Poland; (B.P.); (A.P.)
| | - Andrzej Puszka
- Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, Gliniana 33, 20-614 Lublin, Poland; (B.P.); (A.P.)
| | - Zbigniew Hnatejko
- Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland;
| | - Marek Stankevič
- Department of Organic Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Marie Curie-Skłodowska University, Gliniana 33, 20-614 Lublin, Poland;
| | - Halina Głuchowska
- Department of General and Coordination Chemistry and Crystallography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. C. Skłodowskiej Sq. 2, 20-031 Lublin, Poland;
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5
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Gannouni A, Louis H, Roisnel T, Isang BB, Benjamin I, Kefi R. X-Ray Crystallography, Spectral Analysis, DFT Studies, and Molecular Docking of (C 9H 15N 3)[CdCl 4] Hybrid Material against Methicillin-Resistant Staphylococcus aureus (MRSA). Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2169721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Afef Gannouni
- Faculté Des Sciences De Bizerte, Laboratoire de Chimie Des Matériaux, Zarzouna, Tunisie
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Thierry Roisnel
- Centre de Diffractométrie X, UMR 6226 CNRS, Institut Sciences Chimiques De Rennes, Université De Rennes I, Rennes, France
| | - Bartholomew B. Isang
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Mathematics, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar, Nigeria
| | - Riadh Kefi
- Faculté Des Sciences De Bizerte, Laboratoire de Chimie Des Matériaux, Zarzouna, Tunisie
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6
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Kawakami T, Tamaki S, Shirase S, Tsurugi H, Mashima K. Syntheses and Redox Properties of Carboxylate-Ligated Hexanuclear Ce(IV) Clusters and Their Photoinduced Homolysis of the Ce(IV)–Ligand Covalent Bond. Inorg Chem 2022; 61:20461-20471. [DOI: 10.1021/acs.inorgchem.2c03163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tomomi Kawakami
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Sota Tamaki
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Satoru Shirase
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
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7
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Anticancer, antimicrobial and biomedical features of polyoxometalate as advanced materials: A review study. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Wang X, Syed ZH, Chen Z, Bazak JD, Gong X, Wasson MC, Washton NM, Chapman KW, Notestein JM, Farha OK. Enhanced Catalytic Performance of a Ce/V Oxo Cluster through Confinement in Mesoporous SBA-15. ACS APPLIED MATERIALS & INTERFACES 2022; 14:52886-52893. [PMID: 36395424 DOI: 10.1021/acsami.2c15046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
To increase catalytic efficiency, mesoporous supports have been widely applied to immobilize well-defined metal oxide clusters due to their ability to stabilize highly dispersed clusters. Herein, a redox-active heterometallic Ce12V6-oxo cluster (CeV) was first presynthesized and then incorporated into mesoporous silica, SBA-15, via a straightforward impregnation method. Scanning transmission electron microscopy (STEM) and Fourier transform infrared spectroscopy (FTIR), in concert with scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), verified the successful introduction of the CeV cluster inside the pore of SBA-15. The 51V magic angle spinning solid-state nuclear magnetic resonance (51V MAS NMR) spectroscopy and differential pair distribution function (dPDF) analysis confirmed the structural integrity of the CeV cluster inside the SBA-15. The composite was then benchmarked for liquid-phase oxidation of 2-chloroethyl ethyl sulfide (CEES) under mild conditions and gas-phase oxidative dehydrogenation (ODH) of propane under high temperatures (up to 550 °C). The catalytic reactivity results demonstrated 8- and 14-fold increase in turnover frequency (TOF) values of the composite (CeV@10SBA-2) than the bulk CeV cluster under the same conditions for CEES oxidation and ODH, respectively. These results highlight the improved reactivity of the catalytically active CeV cluster as attributed to the higher dispersion of the discrete cluster upon immobilization within the SBA-15 support.
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Affiliation(s)
- Xingjie Wang
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Zoha H Syed
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Zhihengyu Chen
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - J David Bazak
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xinyi Gong
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Megan C Wasson
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
| | - Nancy M Washton
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Karena W Chapman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Justin M Notestein
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Omar K Farha
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208, United States
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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9
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Schubert U. Clusters with a Zr6O8 core. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Lu ZQ, Yin Z, Zhang LL, Yan Y, Jiang Z, Wu H, Wang W. Synthesis of Proton Conductive Copolymers of Inorganic Polyacid Cluster Polyelectrolytes and PEO Bottlebrush Polymers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02443] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Zhuo-Qun Lu
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Zhuoyu Yin
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Lan-Lan Zhang
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Yukun Yan
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Hong Wu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Wei Wang
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
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Moroz YA, Lozinskii NS, Lopanov AN. Synthesis and Thermal Properties of Tetramethylammonium and Tetraethylammonium Salts of Phosphotungstate Metalates with Some 3d Elements. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622020103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Yeardley AS, Milton RA, Moghadam PZ, Coordiner J, Brown SF. Active Subsets as a Tool for Structural Characterisation and Selection of Metal-Organic Frameworks. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.01.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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13
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Zhang Y, de Azambuja F, Parac-Vogt TN. Zirconium oxo clusters as discrete molecular catalysts for the direct amide bond formation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00421f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A discrete dodecanuclear Zr oxo cluster catalyzed the direct formation of amide bonds without the need of water scavenging or dry reactions conditions showcasing the potential of these molecular clusters to become a new class of efficient catalysts.
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Affiliation(s)
- Yujie Zhang
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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14
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Tuning the Activity of a Hybrid Polymer-Oxocluster Catalyst: A Composition-Selectivity Correlation. Polymers (Basel) 2021; 13:polym13193268. [PMID: 34641087 PMCID: PMC8512674 DOI: 10.3390/polym13193268] [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: 07/20/2021] [Revised: 09/15/2021] [Accepted: 09/22/2021] [Indexed: 11/17/2022] Open
Abstract
Zr-based oxoclusters MxOy(OR)w(OOR')z are promising catalysts for the activation of hydrogen peroxide. However, they need to be integrated into suitable matrices to increase their hydrolytic stability and allow for their recovery after use. Polymeric materials can be successfully employed for this aim, since they modify the properties of the resulting hybrid materials, in terms of polarity and chemical affinity for the substrates, improving the catalytic activity. Herein, we report the synthesis of different acrylic polymers based on various co-monomers (methyl methacrylate (MMA), 2,2,2-trifluoroethylmethacrylate (TFMA) and 3-methacryloxypropyltrimethoxylsilane (MAPTMS)) covalently cross-linked by a Zr4-based oxocluster, whose composition was tuned to optimise the catalytic oxidation of methyl p-tolyl sulphide. To assess their properties and stability, the materials were characterised via Fourier Transform Infrared (FT-IR) and Raman spectroscopies, Thermogravimetric Analysis (TGA), Solid-State NMR (SS-NMR) and X-Ray Absorption Spectroscopies XAS, before and after catalytic turnover.
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15
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Alashrah S, El-Ghoul Y, Almutairi FM, Omer MAA. Development, Characterization and Valuable Use of Novel Dosimeter Film Based on PVA Polymer Doped Nitro Blue Tetrazolium Dye and AgNO 3 for the Accurate Detection of Low X-ray Doses. Polymers (Basel) 2021; 13:polym13183140. [PMID: 34578041 PMCID: PMC8473152 DOI: 10.3390/polym13183140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/09/2021] [Accepted: 09/11/2021] [Indexed: 12/26/2022] Open
Abstract
Currently, the uncontrolled exposure of individuals to X-rays during medical examinations represents a substantial danger that threatens both medical professionals and patients. Therefore, radiation dosimetry for low X-ray doses is a very important control of radiation practice in medical diagnostic radiology. In line with this, the current study proposes a valuable dosimeter-based PVA thin film doubly doped with silver nitrate salt and nitro blue tetrazolium dye. The nanocomposite film was prepared via a simple casting method and the different processing parameters were optimized. The performance of radiation detection was evaluated according to optical, chromic, chemical and structural changes after exposure to variable low X-ray doses (0, 2, 4, 10 and 20 mGy). The different film labels exhibited an excellent stability behavior in dark and light upon 30 days of storage. The UV-Vis spectrophotometric study showed a gradual increase in the maximum absorbance as a function of the dose and the corresponding response curve confirmed this linear variation (R = 0.998). A clear structural modification was recorded via X-ray diffraction (XRD) analysis revealing the increase in crystallinity with the level of the dose received by the nanocomposite films. Microscopic surface analysis via SEM assessments revealed a significant morphological change in PVA/Ag+/NBT films exposed to increased radiation doses and typical dendrites growing in needle- or tree-like microstructures appeared with a high X-ray dose. Finally, the nanocomposite films before and after irradiation were evaluated via a spectrocolorimetric study and the different CIELab coordinates, the color difference, as well as the color strength, showed a linear correlation with the intensity of the applied dose. This new dosimeter design could, therefore, provide a promising and efficient alternative for prompt and accurate detection of low X-rays doses in diagnostic radiology.
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Affiliation(s)
- Saleh Alashrah
- Department of Physics, College of Science, Qassim University, Buraidah 51452, Saudi Arabia;
| | - Yassine El-Ghoul
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
- Textile Engineering Laboratory, University of Monastir, Monastir 5019, Tunisia
- Correspondence:
| | - Faisal Muteb Almutairi
- College of Science, Al-Imam Muhammad Ibn Saud Islamic University, Riyadh 11623, Saudi Arabia;
| | - Mohammed Ahmed Ali Omer
- Department of Radiologic Technology, College of Applied Medical Sciences, Qassim University, Buraidah 51452, Saudi Arabia;
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16
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Patel A, Sadasivan R, Patel J. Chiral Phosphotungstate Functionalized with ( S)-1-Phenylethylamine: Synthesis, Characterization, and Asymmetric Epoxidation of Styrene. Inorg Chem 2021; 60:10979-10989. [PMID: 34270212 DOI: 10.1021/acs.inorgchem.1c00636] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present work, an attempt has been made to induce chirality in copper-substituted phosphotungstate (PW11Cu) by functionalization with (S)-(+)-1-phenylethylamine (S-PEA) via a ligand substitution approach. The formation of a N→Cu dative bond was confirmed by 13C NMR, while 1H NMR, circular dichroism spectroscopy and optical rotation studies confirmed the introduction of chirality to the Keggin structure. The synthesized material was used as the heterogeneous catalyst for the asymmetric epoxidation of styrene using various green oxidants to obtain high enantiomeric excess (ee), and the reaction with molecular oxygen was found to give the best ee. Regeneration studies were carried out, and the catalyst was found to be suitable for the same. A probable mechanism is also proposed. A comparison with other copper-based polyoxometalate catalysts clearly demonstrate the superiority and novelty of the present catalyst in terms of the reaction conditions as well as the obtained ee.
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Affiliation(s)
- Anjali Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 39002, Gujarat, India
| | - Rajesh Sadasivan
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 39002, Gujarat, India
| | - Jay Patel
- Polyoxometalates and Catalysis Laboratory, Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 39002, Gujarat, India
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17
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D’Cruz B, Amin MO, Al-Hetlani E. Polyoxometalate-Based Materials for the Removal of Contaminants from Wastewater: A Review. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02007] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Bessy D’Cruz
- Department of Chemistry, Faculty of Science, Kuwait University, 13060 Safat, Kuwait
| | - Mohamed O. Amin
- Department of Chemistry, Faculty of Science, Kuwait University, 13060 Safat, Kuwait
| | - Entesar Al-Hetlani
- Department of Chemistry, Faculty of Science, Kuwait University, 13060 Safat, Kuwait
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18
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Lu ZQ, Zhang LL, Yan Y, Wang W. Polyelectrolytes of Inorganic Polyoxometalates: Acids, Salts, and Complexes. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00783] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhuo-Qun Lu
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Lan-Lan Zhang
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
| | - Yukun Yan
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
| | - Wei Wang
- Center for Synthetic Soft Materials, Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
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Jelinek L, Mištová E, Kubeil M, Stephan H. Polyoxometalates in Extraction and Sorption Processes. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1874107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ludek Jelinek
- Department of Power Engineering, University of Chemistry and Technology, Prague 6, Czech Republic
| | - Eva Mištová
- Department of Power Engineering, University of Chemistry and Technology, Prague 6, Czech Republic
| | - Manja Kubeil
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Holger Stephan
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
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20
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Research Progress on Catalytic Water Splitting Based on Polyoxometalate/Semiconductor Composites. Catalysts 2021. [DOI: 10.3390/catal11040524] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In recent years, due to the impact of global warming, environmental pollution, and the energy crisis, international attention and demand for clean energy are increasing. Hydrogen energy is recognized as one of the clean energy sources. Water is considered as the largest potential supplier of hydrogen energy. However, artificial catalytic water splitting for hydrogen and oxygen evolution has not been widely used due to its high energy consumption and high cost during catalytic cracking. Therefore, the exploitation of photocatalysts, electrocatalysts, and photo-electrocatalysts for rapid, cost effective, and reliable water splitting is essentially needed. Polyoxometalates (POMs) are regarded as the potential candidates for water splitting catalysis. In addition to their excellent catalytic properties and reversibly redox activities, POMs can also modify semiconductors to overcome their shortcomings, and improve photoelectric conversion efficiency and photocatalytic activity, which has attracted more and more attention in the field of photoelectric water splitting catalysis. In this review, we summarize the latest applications of POMs and semiconductor composites in the field of photo-electrocatalysis (PEC) for hydrogen and oxygen evolution by catalytic water splitting in recent years and take the latest applications of POMs and semiconductor composites in photocatalysis for water splitting. In the conclusion section, the challenges and strategies of photocatalytic and PEC water-splitting by POMs and semiconductor composites are discussed.
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21
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Zhang Z, Wang Y, Li T, Ma P, Zhang X, Xia B, Chen M, Du M, Dong W. High-Performance Polylactic Acid Materials Enabled by TiO2–Polydopamine Hybrid Nanoparticles. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c06238] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zheng Zhang
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Yang Wang
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Ting Li
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Piming Ma
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Xuhui Zhang
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Bihua Xia
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Mingqing Chen
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Mingliang Du
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Weifu Dong
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
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22
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Soto D, Alzate M, Gallego J, Orozco J. Hybrid nanomaterial/catalase-modified electrode for hydrogen peroxide sensing. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114826] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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23
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da Silva AF, de Pádua GS, de Araújo DT, Vieira CA, de Faria EH. Immobilization of l-alanine into natural kaolinite via amidation catalyzed by boric acid for the development of biohybrid materials. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Wu Y, Liu Y, Huang Y, Xiao G, Li Y, Bai Y, Dang D. Five isomorphous polyoxometalate-based inorganic-organic hybrid materials comprising 2D metal-organic layers. J SOLID STATE CHEM 2020. [DOI: 10.1016/j.jssc.2020.121302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Fu S, Yang D, Zhang P, Sun G. Antibacterial Polylactic- co-glycolic Acid Braided Threads Using Plasma and Coating Modifications for Acupoint Catgut Embedding Therapy Applications. ACS APPLIED BIO MATERIALS 2020; 3:1902-1912. [PMID: 35025313 DOI: 10.1021/acsabm.9b01071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Polylactic-co-glycolic acid (PLGA) thread is frequently used for acupoint catgut embedding therapy (ACET), but the poor hydrophilicity and biocompatibility largely limited its wider applications. The aim of this study is to functionalize the PLGA braided thread and improve its cell adhesion property. The PLGA strands are first processed into threads on a circular braiding machine, and then, antibacterial treatment was introduced with and without oxygen plasma treatments. Afterward, functional characterizations such as antibacterial activity (Staphylococcus aureus and Escherichia coli), cytotoxicity, cell attachment and cell morphology, histological observation, and biodegradation experiments of threads were measured. Moreover, tensile properties and flexibility of the threads were determined to evaluate their mechanical properties. The modified threads showed rougher surfaces than those of the unmodified ones from SEM observations, and the weights and fiber diameters of the threads increased correspondingly, together with the improved surface hydrophilicity. All coated sutures showed durable antimicrobial function and slow drug releasing features for more than 5 days and good cell viability (more than 75%), according to the standard of ISO 10993-5:2009. Besides, cell attachment, tissue growth, and collagen regeneration of plasma-treated samples were greatly improved compared to those of without the plasma treatment. The threads presented slow degradation behavior after the antibacterial treatment. The threads with only plasma-treated revealed a promising prospect for clinical applications.
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Affiliation(s)
- Shaoju Fu
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Dongchao Yang
- Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200011, China
| | - Peihua Zhang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Gang Sun
- Department of Biological and Agricultural Engineering, University of California, Davis, Davis, California 95616, United States
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26
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Solid-state structure and solution behavior of two titanium oxo-alkoxide complexes with phenylphosphonate ligands. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Groch P, Czaja K, Sacher-Majewska B. Thermal stability of ethylene copolymers with multi-alkenylsilsesquioxane comonomers synthesized by organometallic catalyst - Effect of copolymer structure. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Svensson FG, Daniel G, Tai CW, Seisenbaeva GA, Kessler VG. Titanium phosphonate oxo-alkoxide “clusters”: solution stability and facile hydrolytic transformation into nano titania. RSC Adv 2020; 10:6873-6883. [PMID: 35493899 PMCID: PMC9049727 DOI: 10.1039/c9ra10691j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 02/09/2020] [Indexed: 01/14/2023] Open
Abstract
Oligonuclear Ti(iv) oxo-alkoxide-phosphonate complexes, produced by reaction of tBuPO(OH)2 with Ti(OR)4, are easily topotactically hydrolyzed forming intricate nanostructures.
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Affiliation(s)
- Fredric G. Svensson
- Department of Molecular Sciences
- Swedish University of Agricultural Sciences
- 750 07 Uppsala
- Sweden
| | - Geoffrey Daniel
- Department of Biomaterials and Technology/Wood Science
- Swedish University of Agricultural Sciences
- 75007 Uppsala
- Sweden
| | - Cheuk-Wai Tai
- Department of Materials and Environmental Chemistry
- Stockholm University
- 106 91 Stockholm
- Sweden
| | - Gulaim A. Seisenbaeva
- Department of Molecular Sciences
- Swedish University of Agricultural Sciences
- 750 07 Uppsala
- Sweden
| | - Vadim G. Kessler
- Department of Molecular Sciences
- Swedish University of Agricultural Sciences
- 750 07 Uppsala
- Sweden
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29
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Anyushin AV, Kondinski A, Parac-Vogt TN. Hybrid polyoxometalates as post-functionalization platforms: from fundamentals to emerging applications. Chem Soc Rev 2019; 49:382-432. [PMID: 31793568 DOI: 10.1039/c8cs00854j] [Citation(s) in RCA: 200] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polyoxometalates (POMs) represent an important group of metal-oxo nanoclusters, typically comprised of early transition metals in high oxidation states (mainly V, Mo and W). Many plenary POMs exhibit good pH, solvent, thermal and redox stability, which makes them attractive components for the design of covalently integrated hybrid organic-inorganic molecules, herein referred to as hybrid-POMs. Until now, thousands of organic hybrid-POMs have been reported; however, only a small fraction can be further functionalized using other organic molecules or metal cations. This emerging class of 'post-functionalizable' hybrid-POMs constitute a valuable modular platform that permits coupling of POM properties with different organic and metal cation functionalities, thereby expanding the key physicochemical properties that are relevant for application in (photo)catalysis, bioinorganic chemistry and materials science. The post-functionalizable hybrid-POM platforms offer an opportunity to covalently link multi-electron redox responsive POM cores with virtually any (bio)organic molecule or metal cation, generating a wide range of materials with tailored properties. Over the past few years, these materials have been showcased in the preparation of framework materials, functional surfaces, surfactants, homogeneous and heterogeneous catalysts and light harvesting materials, among others. This review article provides an overview on the state of the art in POM post-functionalization and highlights the key design and structural features that permit the discovery of new hybrid-POM platforms. In doing so, we aim to make the subject more comprehensible, both for chemists and for scientists with different materials science backgrounds interested in the applications of hybrid (POM) materials. The review article goes beyond the realms of polyoxometalate chemistry and encompasses emerging research domains such as reticular materials, surfactants, surface functionalization, light harvesting materials, non-linear optics, charge storing materials, and homogeneous acid-base catalysis among others.
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30
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Fu Z, Qu Z, Yu T, Bi L. Study on electrochromic-fluorescence switching performance of film based on silicomolybdotungstate and silica nanoparticles doped with negative charged dye. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Ly HGT, Mihaylov TT, Proost P, Pierloot K, Harvey JN, Parac‐Vogt TN. Chemical Mimics of Aspartate‐Directed Proteases: Predictive and Strictly Specific Hydrolysis of a Globular Protein at Asp−X Sequence Promoted by Polyoxometalate Complexes Rationalized by a Combined Experimental and Theoretical Approach. Chemistry 2019; 25:14370-14381. [DOI: 10.1002/chem.201902675] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/13/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Hong Giang T. Ly
- Laboratory of Bioinorganic ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Tzvetan T. Mihaylov
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Paul Proost
- Laboratory of Molecular ImmunologyRega InstituteDepartment of Microbiology, Immunology, and TransplantationKU Leuven Herestraat 49 3000 Leuven Belgium
| | - Kristine Pierloot
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Jeremy N. Harvey
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Tatjana N. Parac‐Vogt
- Laboratory of Bioinorganic ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
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32
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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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33
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Kaledin AL, Troya D, Karwacki CJ, Balboa A, Gordon WO, Morris JR, Mitchell MB, Frenkel AI, Hill CL, Musaev DG. Key mechanistic details of paraoxon decomposition by polyoxometalates: Critical role of para-nitro substitution. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.11.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Wu Y, Li X, Liu Y, Xiao G, Huang Y, Li Y, Dang D, Bai Y. Three novel polyoxometalate-based inorganic–organic hybrid materials based on 2,6-bis(1,2,4-triazol-1-yl)pyridine. RSC Adv 2019; 9:11932-11938. [PMID: 35517018 PMCID: PMC9063552 DOI: 10.1039/c9ra01451a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/01/2019] [Indexed: 11/21/2022] Open
Abstract
Three novel inorganic–organic hybrid materials [Co(btp)2(W5O16)(H2O)]n (1), [Cd3(btp)6(PW12O40)2(H2O)6·6H2O]n (2), and [Ag3(btp)2(PMo12O40)·1.5H2O]n (3) (btp = 2,6-bis(1,2,4-triazol-1-yl)pyridine) have been hydrothermally synthesized and characterized by IR spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), elemental analysis and thermal gravimetric analysis (TGA). The most striking structure feature of compound 1 is a 3D polycatenation framework, interpenetrated by a 2D 4-connected sql topology layer and a 3D 6-connected rob topology framework. Compound 2 exhibits a rare meso-helices 3D network with different chiralities crossing coexistence. Compound 3 also holds a 3D framework formed by linking terminal oxygen atoms of [α-PMo12O40]3− anions and silver ions in a 2D metal–organic layer. Compound 1 displays antiferromagnetic behavior. The luminescence, electrochemical and photocatalytic properties of compounds 1–3 have also been investigated. Compound 3 exhibits significant electrochemical activity for the reduction of H2O2 while compounds 1 and 2 show efficient photocatalytic activities for the degradation of Rhodamine B (RhB). Furthermore, the three compounds display luminescence behaviors in the solid state. Three novel inorganic–organic hybrid materials based on 2,6-bis(1,2,4-triazol-1-yl)pyridine have been synthesized with different polyanions and transition metal ions.![]()
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Affiliation(s)
- Yingying Wu
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Xuefei Li
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Ying Liu
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Ge Xiao
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Yijiao Huang
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Yamin Li
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Dongbin Dang
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
| | - Yan Bai
- Key Laboratory of Polyoxometalate Chemistry of Henan Province
- School of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- PR China
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Syrgiannis Z, Trautwein G, Calvaresi M, Modugno G, Zerbetto F, Carraro M, Prato M, Bonchio M. Controlling Size‐Dispersion of Single Walled Carbon Nanotubes by Interaction with Polyoxometalates Armed with a Tryptophan Tweezer. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zois Syrgiannis
- Department of Chemical Sciences ‐ University of Padova and ITM‐CNR ‐ Unit of Padova University of Padova and via F. Marzolo 1 35131 Padova Italy
- Center of Excellence and Nanostructured Materials (CENMAT) INSTM ‐ Unit of Trieste and University of Trieste via L. Giorgieri 1 34127 Trieste (TS) Italy
| | - Guido Trautwein
- Department of Chemical Sciences ‐ University of Padova and ITM‐CNR ‐ Unit of Padova University of Padova and via F. Marzolo 1 35131 Padova Italy
| | - Matteo Calvaresi
- Department of Chemistry “Giacomo Ciamician” Alma Mater Studiorum ‐ University of Bologna via F. Selmi 2 40126 Bologna Italy
| | - Gloria Modugno
- Department of Chemical Sciences ‐ University of Padova and ITM‐CNR ‐ Unit of Padova University of Padova and via F. Marzolo 1 35131 Padova Italy
| | - Francesco Zerbetto
- Department of Chemistry “Giacomo Ciamician” Alma Mater Studiorum ‐ University of Bologna via F. Selmi 2 40126 Bologna Italy
| | - Mauro Carraro
- Department of Chemical Sciences ‐ University of Padova and ITM‐CNR ‐ Unit of Padova University of Padova and via F. Marzolo 1 35131 Padova Italy
| | - Maurizio Prato
- Center of Excellence and Nanostructured Materials (CENMAT) INSTM ‐ Unit of Trieste and University of Trieste via L. Giorgieri 1 34127 Trieste (TS) Italy
- Carbon Nanobiotechnology Laboratory ‐ CIC biomaGUNE Paseo de Miramón 182 20009 Donostia‐San Sebastian Spain
- Basque Fdn Sci, Ikerbasque 48013 Bilbao Spain
| | - Marcella Bonchio
- Department of Chemical Sciences ‐ University of Padova and ITM‐CNR ‐ Unit of Padova University of Padova and via F. Marzolo 1 35131 Padova Italy
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Tetranuclear Oxo-Titanium Clusters with Different Carboxylate Aromatic Ligands: Optical Properties, DFT Calculations, and Photoactivity. MATERIALS 2018; 11:ma11091661. [PMID: 30205558 PMCID: PMC6164694 DOI: 10.3390/ma11091661] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/29/2018] [Accepted: 09/04/2018] [Indexed: 11/21/2022]
Abstract
Titanium(IV) oxo-clusters of the general formula (Ti4O2(OiBu)10(O2CR’)2) (R’ = C13H9 (1), PhCl (2), PhNO2 (3)) were studied in order to estimate their potential photoactivity. The structure of the resulting tetranuclear Ti(IV) oxo-complexes was then determined via single crystal X-ray diffraction, infrared and Raman spectroscopy, and electron spin resonance (ESR). An analysis of diffuse reflectance spectra (DRS) allowed for the assessment of band gap values of (1)–(3) microcrystalline samples complexes. The use of different carboxylate ligands allowed the band gap of tetranuclear Ti(IV) oxo-clusters to be modulated in the range of 3.6 eV–2.5 eV. Density functional theory (DFT) methods were used to explain the influence of substitutes on band gap and optical activity. Dispersion of (1)–(3) microcrystals in the poly(methyl methacrylate) (PMMA) matrixes enabled the formation of composite materials for which the potential photocatalytic activity was estimated through the study on methylene blue (MB) photodegradation processes in the presence of UV light. The results obtained revealed a significant influence of carboxylate ligands functionalization on the photoactivity of synthesized tetranuclear Ti(IV) oxo-complexes.
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37
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Sullivan KP, Yin Q, Collins-Wildman DL, Tao M, Geletii YV, Musaev DG, Lian T, Hill CL. Multi-Tasking POM Systems. Front Chem 2018; 6:365. [PMID: 30186830 PMCID: PMC6111459 DOI: 10.3389/fchem.2018.00365] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 07/30/2018] [Indexed: 11/13/2022] Open
Abstract
Polyoxometalate (POM)-based materials of current interest are summarized, and specific types of POM-containing systems are described in which material facilitates multiple complex interactions or catalytic processes. We specifically highlight POM-containing multi-hydrogen-bonding polymers that form gels upon exposure to select organic liquids and simultaneously catalyze hydrolytic or oxidative decontamination, as well as water oxidation catalysts (WOCs) that can be interfaced with light-absorbing photoelectrode materials for photoelectrocatalytic water splitting.
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Affiliation(s)
- Kevin P Sullivan
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | | | - Meilin Tao
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, Atlanta, GA, United States.,Emerson Center for Scientific Computation, Emory University, Atlanta, GA, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, GA, United States
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38
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Blanco I. The Rediscovery of POSS: A Molecule Rather than a Filler. Polymers (Basel) 2018; 10:E904. [PMID: 30960829 PMCID: PMC6403991 DOI: 10.3390/polym10080904] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/09/2018] [Accepted: 08/10/2018] [Indexed: 11/17/2022] Open
Abstract
The use of polyhedral oligomeric silsesquioxanes (POSSs) for making polymer composites has grown exponentially since the last few years of the 20th century. In comparison with the other most commonly used fillers, POSSs possess the advantage of being molecules. Thus, this allows us to combine their nano-sized cage structures, which have dimensions that are similar to those of most polymer segments and produce a particular and exclusive chemical composition. These characteristics linked with their hybrid (inorganic⁻organic) nature allow researchers to modify POSS according to particular needs or original ideas, before incorporating them into polymers. In this present study, we first start with a brief introduction about the reasons for the rediscovery of these nanoparticles over the last 25 years. Starting from the form of POSS that is most widely used in literature (octaisobutyl POSS), this present study aims to evaluate how the reduction of symmetry through the introduction of organic groups favors their dispersion in polystyrene matrix without compromising their solubility.
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Affiliation(s)
- Ignazio Blanco
- Department of Civil Engineering and Architecture, University of Catania and UdR-Catania Consorzio INSTM, Viale Andrea Doria 6, 95125 Catania, Italy.
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Soto D, Alzate M, Gallego J, Orozco J. Electroanalysis of an Iron@Graphene-Carbon Nanotube Hybrid Material. ELECTROANAL 2018. [DOI: 10.1002/elan.201800115] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dayana Soto
- Max Planck Tandem Group in Nanobioengieneering; Universidad de Antioquia, Complejo Ruta N; Calle 67 N° 52-20 Medellín 050010 Colombia
| | - Manuela Alzate
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química; Universidad de Antioquia; Calle 70 N° 52-21 Medellin Colombia
| | - Jaime Gallego
- Química de Recursos Energéticos y Medio Ambiente, Instituto de Química; Universidad de Antioquia; Calle 70 N° 52-21 Medellin Colombia
| | - Jahir Orozco
- Max Planck Tandem Group in Nanobioengieneering; Universidad de Antioquia, Complejo Ruta N; Calle 67 N° 52-20 Medellín 050010 Colombia
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40
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Enferadi-Kerenkan A, Do TO, Kaliaguine S. Heterogeneous catalysis by tungsten-based heteropoly compounds. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00281a] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, the recent works on heterogeneous catalytic applications of polyoxotungstates in liquid-phase organic reactions are reviewed.
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Affiliation(s)
| | - Trong-On Do
- Department of Chemical Engineering
- Université Laval
- Québec
- Canada
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41
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Nateghi B, Boldog I, Domasevitch KV, Janiak C. More versatility than thought: large {Zr26} oxocarboxylate cluster by corner-sharing of standard octahedral subunits. CrystEngComm 2018. [DOI: 10.1039/c8ce01064a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The largest known zirconium cluster with an idealized formula of [Zr26O18(OH)30(HCOO)38] was obtained via solvolysis of ZrOCl2 in DMF/HCOOH.
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Affiliation(s)
- Bahareh Nateghi
- Institute of Inorganic Chemistry and Structural Chemistry
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | - Ishtvan Boldog
- Institute of Inorganic Chemistry and Structural Chemistry
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
| | | | - Christoph Janiak
- Institute of Inorganic Chemistry and Structural Chemistry
- Heinrich-Heine-Universität Düsseldorf
- D-40225 Düsseldorf
- Germany
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42
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Vologzhanina AV, Zorina-Tikhonova EN, Matyukhina AK, Sidorov AA, Dorovatovskii PV, Eremenko IL. 36-Nuclear anionic cobalt(II) and nickel(II) complexes in solid-phase insertion reactions. RUSS J COORD CHEM+ 2017. [DOI: 10.1134/s1070328417120107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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43
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Luong TKN, Govaerts I, Robben J, Shestakova P, Parac-Vogt TN. Polyoxometalates as artificial nucleases: hydrolytic cleavage of DNA promoted by a highly negatively charged Zr IV-substituted Keggin polyanion. Chem Commun (Camb) 2017; 53:617-620. [PMID: 27982140 DOI: 10.1039/c6cc08555e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A highly negatively charged binuclear ZrIV-substituted Keggin polyoxometalate [{α-PW11O39Zr(μ-OH)(H2O)}2]8- (ZrK 2 : 2) has been shown to promote the hydrolytic cleavage of phosphoester bonds in the supercoiled plasmid pUC19 DNA under physiological pH and temperature, giving relaxed and linear forms of pUC19 as hydrolysis products. The interaction between ZrK 2 : 2 and DNA was experimentally proven by circular dichroism (CD) spectroscopy and 31P diffusion ordered NMR spectroscopy.
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Affiliation(s)
- T K N Luong
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F and 200G, 3001 Heverlee, Belgium.
| | - I Govaerts
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F and 200G, 3001 Heverlee, Belgium.
| | - J Robben
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F and 200G, 3001 Heverlee, Belgium.
| | - P Shestakova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bontchev Street, Bl.9, 1113 Sofia, Bulgaria
| | - T N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F and 200G, 3001 Heverlee, Belgium.
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44
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Sharps MC, Marsh DA, Zakharov LN, Hutchison JE, Johnson DW. Implications of Crystal Structure on Organotin Carboxylate Photoresists†. CRYSTAL RESEARCH AND TECHNOLOGY 2017. [DOI: 10.1002/crat.201700081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Meredith C. Sharps
- Department of Chemistry & Biochemistry and Materials Science Institute University of Oregon Eugene OR 97403‐1253 United States
| | - David A. Marsh
- Department of Chemistry & Biochemistry and Materials Science Institute University of Oregon Eugene OR 97403‐1253 United States
| | - Lev N. Zakharov
- CAMCOR University of Oregon 1443 East 13th Ave. Eugene Oregon 97403 United States
| | - James E. Hutchison
- Department of Chemistry & Biochemistry and Materials Science Institute University of Oregon Eugene OR 97403‐1253 United States
| | - Darren W. Johnson
- Department of Chemistry & Biochemistry and Materials Science Institute University of Oregon Eugene OR 97403‐1253 United States
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45
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Gharatape A, Salehi R. Recent progress in theranostic applications of hybrid gold nanoparticles. Eur J Med Chem 2017; 138:221-233. [PMID: 28668475 DOI: 10.1016/j.ejmech.2017.06.034] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 06/18/2017] [Accepted: 06/21/2017] [Indexed: 11/16/2022]
Abstract
A significant area of research is theranostic applications of nanoparticles, which involves efforts to improve delivery and reduce side effects. Accordingly, the introduction of a safe, effective, and, most importantly, renewable strategy to target, deliver and image disease cells is important. This state-of-the-art review focuses on studies done from 2013 to 2016 regarding the development of hybrid gold nanoparticles as theranostic agents in the diagnosis and treatment of cancer and infectious disease. Several syntheses (chemical and green) methods of gold nanoparticles and their applications in imaging, targeting, and delivery are reviewed; their photothermal efficiency is discussed as is the toxicity of gold nanoparticles. Owing to the unique characterizations of hybrid gold nanoparticles and their potential to be developed as multifunctional, we predict they will present an undeniable role in clinical studies and provide treatment platforms for various diseases. Thus, their clearance and interactions with extra- and intra-cellular molecules need to be considered in future projects.
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Affiliation(s)
- Alireza Gharatape
- Department of Medical Nanotechnology, School of Advanced Medical Science, Tabriz University of Medical Science, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Roya Salehi
- Drug Applied Research Center and Department of Medical Nanotechnology, School of Advanced Medical Science, Tabriz University of Medical Science, Tabriz, Iran.
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46
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Gu M, Wang M, Weng Z, Ren Y, Yue B. Hydrothermal synthesis and characterization of POMs-based compounds based on binuclear [M2(3-bpo)2] (M = Co, Cu) unit and its derivatives. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.01.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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von Allmen KD, Grundmann H, Linden A, Patzke GR. Synthesis and Characterization of 0D–3D Copper-Containing Tungstobismuthates Obtained from the Lacunary Precursor Na9[B-α-BiW9O33]. Inorg Chem 2016; 56:327-335. [DOI: 10.1021/acs.inorgchem.6b02217] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Kim D. von Allmen
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Henrik Grundmann
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Anthony Linden
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R. Patzke
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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48
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Benedetti C, Cazzolaro A, Carraro M, Graf R, Landfester K, Gross S, Muñoz-Espí R. Dual Role of Zirconium Oxoclusters in Hybrid Nanoparticles: Cross-Linkers and Catalytic Sites. ACS APPLIED MATERIALS & INTERFACES 2016; 8:26275-26284. [PMID: 27611714 DOI: 10.1021/acsami.6b07023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Organic-inorganic hybrid nanoparticles are prepared by free-radical copolymerization of methyl methacrylate (MMA) with the structurally well-defined methacrylate-functionalized zirconium oxocluster Zr4O2(methacrylate)12. The polymerization process occurs in the confined space of miniemulsion droplets. The formation of covalent chemical bonds between the organic and the inorganic counterparts improves the distribution of the guest species (oxoclusters) in the polymer particles, overcoming problems related to migration, leaching, and stability. Because of the presence of a high number of double bonds (12 per oxocluster), the oxoclusters act as efficient cross-linking units for the resulting polymer matrix, thus ruling its swelling behavior in organic solvents. The synthesized hybrid nanostructures are applied as heterogeneous systems in the catalytic oxidation of an organic sulfide to the corresponding sulfoxide and sulfone by hydrogen peroxide, displaying quantitative sulfide conversion in 4-24 h, with overall turnover numbers (TON) up to 8000 after 4 cycles.
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Affiliation(s)
- Cesare Benedetti
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Alessandro Cazzolaro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , Via Marzolo 1, 35131 Padova, Italy
| | - Mauro Carraro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , Via Marzolo 1, 35131 Padova, Italy
| | - Robert Graf
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , Via Marzolo 1, 35131 Padova, Italy
- ICMATE-CNR , Via Marzolo 1, 35131 Padova, Italy
| | - Rafael Muñoz-Espí
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
- Institut de Ciència dels Materials (ICMUV), Universitat de València , C/Catedràtic José Beltrán 2, 46980 Paterna, Spain
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49
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Luong TKN, Mihaylov TT, Absillis G, Shestakova P, Pierloot K, Parac-Vogt TN. Phosphate Ester Bond Hydrolysis Promoted by Lanthanide-Substituted Keggin-type Polyoxometalates Studied by a Combined Experimental and Density Functional Theory Approach. Inorg Chem 2016; 55:9898-9911. [PMID: 27657461 DOI: 10.1021/acs.inorgchem.6b01802] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Hydrolytic cleavage of 4-nitrophenyl phosphate (NPP), a commonly used DNA model substrate, was examined in the presence of series of lanthanide-substituted Keggin-type polyoxometalates (POMs) [Me2NH2]11[CeIII(PW11O39)2], [Me2NH2]10[CeIV(PW11O39)2] (abbreviated as (CeIV(PW11)2), and K4[EuPW11O39] by means of NMR and luminescence spectroscopies and density functional theory (DFT) calculations. Among the examined complexes, the Ce(IV)-substituted Keggin POM (CeIV(PW11)2) showed the highest reactivity, and its aqueous speciation was fully determined under different conditions of pD, temperature, concentration, and ionic strength by means of 31P and 31P diffusion-ordered NMR spectroscopy. The cleavage of the phosphoester bond of NPP in the presence of (CeIV(PW11)2) proceeded with an observed rate constant kobs = (5.31 ± 0.06) × 10-6 s-1 at pD 6.4 and 50 °C. The pD dependence of NPP hydrolysis exhibits a bell-shaped profile, with the fastest rate observed at pD 6.4. The formation constant (Kf = 127 M-1) and catalytic rate constant (kc = 19.41 × 10-5 s-1) for the NPP-Ce(IV)-Keggin POM complex were calculated, and binding between CeIV(PW11)2 and the phosphate group of NPP was also evidenced by the change of the chemical shift of the 31P nucleus in NPP upon addition of the POM complex. DFT calculations revealed that binding of NPP to the parent catalyst CeIV(PW11)2 is thermodynamically unlikely. On the contrary, formation of complexes with the monomeric 1:1 species, CeIVPW11, is considered to be more favorable, and the most stable complex, [CeIVPW11(H2O)2(NPP-κO)2]7-, was found to involve two NPP ligands coordinated to the CeIVcenter of CeIVPW11 in the monodentate fashion. The formation of such species is considered to be responsible for the hydrolytic activity of CeIV(PW11)2 toward phosphomonoesters. On the basis of these findings a principle mechanism for the hydrolysis of NPP by the POM is proposed.
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Affiliation(s)
| | | | | | - Pavletta Shestakova
- NMR Laboratory, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences , Acad. G. Bontchev Str., B1.9, 1113 Sofia, Bulgaria
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50
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Patel A, Narkhede N, Singh S, Pathan S. Keggin-type lacunary and transition metal substituted polyoxometalates as heterogeneous catalysts: A recent progress. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2016. [DOI: 10.1080/01614940.2016.1171606] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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