1
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Understanding the molecular origin of the superior toughness of polyamide-6/polyketone blends by solid-state NMR spectroscopy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Sousa RPCL, Figueira RB, Gomes BR, Sousa S, Ferreira RCM, Costa SPG, Raposo MMM. Hybrid Sol-Gel Matrices Doped with Colorimetric/Fluorimetric Imidazole Derivatives. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3401. [PMID: 34947750 PMCID: PMC8705321 DOI: 10.3390/nano11123401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/03/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022]
Abstract
Organic-inorganic hybrids (OIH) are materials that can be easily synthesized by the sol-gel method and combine the advantages of organic and inorganic moieties within a single polymeric matrix. Imidazole derivatives are versatile organic compounds that can change their optical properties with the variation of pH due to the protonation or deprotonation of the nitrogen atoms. This work reports the preparation of different OIHs doped with different contents of two imidazole compounds (3a,b). The obtained materials were characterized structurally by FTIR, and the dielectric properties were studied by electrochemical impedance spectroscopy. The optical properties were studied by UV-Vis absorption and fluorescence spectroscopies. The FTIR analysis showed that the presence of the imidazole does not change the structural properties of the matrices. The normalized resistance values obtained for the doped matrices ranged between 8.57 and 9.32 Ω cm2, all being higher than the undoped matrix. The σ ranged between 9.49 and 10.28 S cm-1, being all higher than the pure OIH samples. Compound 3a showed a maximum absorption peak at 390 nm, which is present in the OIH spectra, proving the presence of the compound. In the case of compound 3b, a maximum absorption wavelength at 412 nm was found, and the compound peak was not clear, which may indicate that an interaction between the compound and the matrix occurred. A synergetic effect between the intrinsic emission of the matrix and the fluorescence of 3a is found on the OIH-doped matrices.
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Affiliation(s)
- Rui P. C. L. Sousa
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
| | - Rita B. Figueira
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
- Vasco da Gama CoLAB, Rua Roberto Frias, 4200-465 Porto, Portugal
| | - Bárbara R. Gomes
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
| | - Sara Sousa
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
| | - R. Cristina M. Ferreira
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
| | - Susana P. G. Costa
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
| | - M. Manuela M. Raposo
- Centre of Chemistry, Campus of Gualtar, University of Minho, 4710-057 Braga, Portugal; (R.P.C.L.S.); (B.R.G.); (S.S.); (R.C.M.F.); (S.P.G.C.); (M.M.M.R.)
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3
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Sousa RPCL, Figueira RB, Gomes BR, Costa SPG, Azenha M, Pereira RFP, Manuela Raposo M. Organic-inorganic hybrid sol-gel materials doped with a fluorescent triarylimidazole derivative. RSC Adv 2021; 11:24613-24623. [PMID: 35481055 PMCID: PMC9036884 DOI: 10.1039/d1ra03997k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 07/02/2021] [Indexed: 12/17/2022] Open
Abstract
The development of sensors for pH monitoring is of extreme importance in the monitoring of concrete and reinforced concrete structures. Imidazole derivatives are promising probes for pH sensing due to the amphoteric nature of their heterocyclic ring, which can be protonated/deprotonated upon pH changes. In this work, a triarylimidazole was synthesised and used as a dopant in an organic–inorganic hybrid (OIH) sol–gel matrix to obtain a pH-sensitive membrane for further application in optical fibre sensors (OFS). The triarylimidazole probe shows fluorimetric response in pH between 9 and 13, which is the desired range for monitoring carbonation of concrete. This degradation process lowers the highly alkaline pH of concrete (12.5–13) to values below 9, which creates favourable conditions for corrosion of concrete reinforcement. The OIH membranes used were based on Jeffamine THF170 and 3-glycidoxypropytrimethoxysilane precursors, which had already been shown to be suitable and resistant in contact with cement-based materials. The OIHs were doped with three different contents of the triarylimidazole and the structural, dielectric, thermal and optical properties of the pure and doped OIH materials were evaluated. The structural analysis showed that the presence of the triarylimidazole did not change the structural properties of the OIH material. Electrochemical impedance spectroscopy showed that in the doped samples the conductivity increased with the imidazole concentration. The εr obtained for the doped samples ranged approximately from 11 to 19 and for the pure matrices was 8. Thermal analysis showed that these materials are stable up to 350 °C and that the presence of the probe did not change that feature. The optical properties showed that the prepared OIH materials have promising properties to be used as pH sensitive fluorimetric probes. OIH sol–gel materials based on Jeffamine THF-170 and GPTMS, doped with triarylimidazole, were synthesized. The εr obtained for the OIH doped samples ranged between 11 and 19. The OIHs are thermally stable for fresh concrete purposes.![]()
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Affiliation(s)
- Rui P C L Sousa
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - Rita B Figueira
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - Bárbara R Gomes
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - Susana P G Costa
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - Miguel Azenha
- ISISE, Engineering School, University of Minho, Campus of Azurém 4800-058 Guimarães Portugal
| | - Rui F P Pereira
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
| | - M Manuela Raposo
- Centre of Chemistry, University of Minho, Campus of Gualtar 4710-057 Braga Portugal
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Ali F, Ali N, Altaf M, Said A, Shah SS, Bilal M. Epoxy Polyamide Composites Reinforced with Silica Nanorods: Fabrication, Thermal and Morphological Investigations. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01518-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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5
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Seo J, Moon SW, Kang H, Choi BH, Seo JH. Foldable and Extremely Scratch-Resistant Hard Coating Materials from Molecular Necklace-like Cross-Linkers. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27306-27317. [PMID: 31241308 DOI: 10.1021/acsami.9b05738] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A flexible hard coating material displaying extreme scratch resistance and foldable flexibility was developed via the design of an organic-inorganic hybrid coating material employing an alkoxysilyl-functionalized polyrotaxane cross-linker (PRX_Si1). PRX_Si1 has a molecular necklace-like structure that can form organic-inorganic cross-linking points and provide large molecular movements. It was postulated that the scratch resistance and flexibility could be simultaneously increased because of the hybrid cross-linking points and dynamic molecular movements. To confirm this hypothesis, the crystalline structure and mechanical properties of the PRX_Si1-based hard coating material were analyzed via transmission electron microscopy, small-angle X-ray diffraction, tensile, pencil hardness, and scratch tests. Finally, the PRX_Si1-based hard coating material could form homogeneously dispersed nanoscale siloxane crystalline domains, and the strain at the break point was 3 times higher than that of a commercial hard coating material, resulting in no defect formation even after 5000 folding test runs. Moreover, the material displayed extremely high pencil hardness (9H) and scratch resistance.
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Affiliation(s)
- Jiae Seo
- Department of Materials Science and Engineering , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul , Korea
| | - Sung Wook Moon
- School of Mechanical Engineering, College of Engineering , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul , Korea
| | - Heemin Kang
- Department of Materials Science and Engineering , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul , Korea
| | - Byoung-Ho Choi
- School of Mechanical Engineering, College of Engineering , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul , Korea
| | - Ji-Hun Seo
- Department of Materials Science and Engineering , Korea University , Anam-ro 145 , Seongbuk-gu, Seoul , Korea
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6
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A novel insight into the origin of toughness in polypropylene–calcium carbonate microcomposites: Multivariate analysis of ss-NMR spectra. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Guo Y, Hu L, Jia P, Zhang B, Zhou Y. Enhancement of thermal stability and chemical reactivity of phenolic resin ameliorated by nanoSiO2. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0240-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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da Silva RR, Cavicchioli M, Lima LR, Otoni CG, Barud HS, Santagneli SH, Tercjak A, Amaral AC, Carvalho RA, Ribeiro SJL. Fabrication of Biocompatible, Functional, and Transparent Hybrid Films Based on Silk Fibroin and Epoxy Silane for Biophotonics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:27905-27917. [PMID: 28715169 DOI: 10.1021/acsami.7b06061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work we explored the fabrication of flexible and transparent hybrids of silk fibroin (SF) and epoxy-modified siloxane for photonic applications. It is well-known that regenerated SF solutions can form free-standing films with high transparency. Although SF has a restricted number of chemically reactive side groups, the main issues of as-cast pristine SF films regard the high solubility into aqueous media, brittleness, and low thermal stability. The design of SF films with enhanced functionality but high transparency triggers new opportunities on a broader range of applications in biophotonics. Here we present a simple, functional, yet remarkably versatile hybrid material derived from silica sol-gel process based on SF protein and (3-glycidyloxypropyl)trimethoxysilane (GPTMS), an organically modified silicon-alkoxide owning a reactive terminal epoxy group. Specifically, we investigated the effect of the addition of GPTMS into SF solutions on the processability, morphology, crystallinity, and mechanical and optical properties of the resulting hybrid films. Highly transparent (ca. 90%) and flexible free-standing hybrid films were achieved. Cell viability assays revealed that the hybrid films are noncytotoxic to rat osteoblast cells even at high GPTMS content (up to 70 wt %). The hybrid films showed enhanced thermal stability and were rich in organic (epoxy) and inorganic (silanol) functional groups according to the content of GPTMS. We also evaluated the successful preparation of high-quality optical red emissive SF hybrid films by loading YVO4:Eu3+ nanoparticles at low concentration (<5 wt %). A meaningful description of the hybrid film structure is reported from the combination of scanning electron and atomic force microscopies, vibrational spectroscopy, solid-state NMR, and X-ray diffraction analyses.
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Affiliation(s)
- Robson R da Silva
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Maurício Cavicchioli
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Laís R Lima
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Caio G Otoni
- National Nanotechnology Laboratory for Agribusiness, EMBRAPA-CNPDIA , São Carlos, São Paulo 13560-970, Brazil
| | - Hernane S Barud
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Silvia H Santagneli
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Agnieszka Tercjak
- Group "Materials + Technologies" (GMT), Department of Chemical and Environmental Engineering, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU) , Plaza Europa 1, 20018 Donostia-San Sebastián, Spain
| | - André C Amaral
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Renata A Carvalho
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Sidney J L Ribeiro
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
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Costa L, Andriatis A, Brennich M, Teulon JM, Chen SWW, Pellequer JL, Round A. Combined small angle X-ray solution scattering with atomic force microscopy for characterizing radiation damage on biological macromolecules. BMC STRUCTURAL BIOLOGY 2016; 16:18. [PMID: 27788689 PMCID: PMC5081678 DOI: 10.1186/s12900-016-0068-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 10/06/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND Synchrotron radiation facilities are pillars of modern structural biology. Small-Angle X-ray scattering performed at synchrotron sources is often used to characterize the shape of biological macromolecules. A major challenge with high-energy X-ray beam on such macromolecules is the perturbation of sample due to radiation damage. RESULTS By employing atomic force microscopy, another common technique to determine the shape of biological macromolecules when deposited on flat substrates, we present a protocol to evaluate and characterize consequences of radiation damage. It requires the acquisition of images of irradiated samples at the single molecule level in a timely manner while using minimal amounts of protein. The protocol has been tested on two different molecular systems: a large globular tetremeric enzyme (β-Amylase) and a rod-shape plant virus (tobacco mosaic virus). Radiation damage on the globular enzyme leads to an apparent increase in molecular sizes whereas the effect on the long virus is a breakage into smaller pieces resulting in a decrease of the average long-axis radius. CONCLUSIONS These results show that radiation damage can appear in different forms and strongly support the need to check the effect of radiation damage at synchrotron sources using the presented protocol.
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Affiliation(s)
- Luca Costa
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, Grenoble, 38000 France
- Present Address: CBS, Centre de Biochimie Structurale, CNRS UMR 5048-INSERM UMR 1054, 29, Rue de Navacelles, Montpellier, 34090 France
| | - Alexander Andriatis
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, Grenoble, 38000 France
- MIT, 77 Massachusetts Ave., Cambridge, 02139 MA USA
| | - Martha Brennich
- ESRF, The European Synchrotron, 71 Avenue des Martyrs, Grenoble, 38000 France
| | - Jean-Marie Teulon
- Univ. Grenoble Alpes, 71 Avenue des Martyrs, Grenoble, 38044 France
- CNRS, IBS, 71 Avenue des Martyrs, Grenoble, 38044 France
- CEA, IBS, 71 Avenue des Martyrs, Grenoble, France
| | - Shu-wen W. Chen
- Univ. Grenoble Alpes, 71 Avenue des Martyrs, Grenoble, 38044 France
- CNRS, IBS, 71 Avenue des Martyrs, Grenoble, 38044 France
- CEA, IBS, 71 Avenue des Martyrs, Grenoble, France
| | - Jean-Luc Pellequer
- Univ. Grenoble Alpes, 71 Avenue des Martyrs, Grenoble, 38044 France
- CNRS, IBS, 71 Avenue des Martyrs, Grenoble, 38044 France
- CEA, IBS, 71 Avenue des Martyrs, Grenoble, France
| | - Adam Round
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, Grenoble, 38000 France
- Unit for Virus Host-Cell Interactions, Univ. Grenoble Alpes-EMBL-CNRS, 71 Avenue des Martyrs, Grenoble, 38000 France
- Faculty of Natural Sciences, Keele University, Keele, Staffordshire UK
- Present Address: European XFEL GmbH, Holzkoppel 4, Schenefeld, 22869 Germany
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10
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Organically modified silica (ORMOSIL) bearing imidazolium – Based ionic liquid prepared by hydrolysis/co-condensation of silane precursors: Synthesis, characterization and use in epoxy networks. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.08.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Brus J, Kobera L, Urbanova M, Doušová B, Lhotka M, Koloušek D, Kotek J, Čuba P, Czernek J, Dědeček J. Interface Induced Growth and Transformation of Polymer-Conjugated Proto-Crystalline Phases in Aluminosilicate Hybrids: A Multiple-Quantum (23)Na-(23)Na MAS NMR Correlation Spectroscopy Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2787-2797. [PMID: 26931131 DOI: 10.1021/acs.langmuir.5b04736] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanostructured materials typically offer enhanced physicochemical properties because of their large interfacial area. In this contribution, we present a comprehensive structural characterization of aluminosilicate hybrids with polymer-conjugated nanosized zeolites specifically grown at the organic-inorganic interface. The inorganic amorphous Al-O-Si framework is formed by alkali-activated low-temperature transformation of metakaoline, whereas simultaneous copolymerization of organic comonomers creates a secondary epoxide network covalently bound to the aluminosilicate matrix. This secondary epoxide phase not only enhances the mechanical integrity of the resulting hybrids but also introduces additional binding sites accessible for compensating negative charge on the aluminosilicate framework. This way, the polymer network initiates growth and subsequent transformation of protocrystalline short-range ordered zeolite domains that are located at the organic-inorganic interface. By applying an experimental approach based on 2D (23)Na-(23)Na double-quantum (DQ) MAS NMR spectroscopy, we discovered multiple sodium binding sites in these protocrystalline domains, in which immobilized Na(+) ions form pairs or small clusters. It is further demonstrated that these sites, the local geometry of which allows for the pairing of sodium ions, are preferentially occupied by Pb(2+) ions during the ion exchange. The proposed synthesis protocol thus allows for the preparation of a novel type of geopolymer hybrids with polymer-conjugated zeolite phases suitable for capturing and storage of metal cations. The demonstrated (23)Na-(23)Na DQ MAS NMR combined with DFT calculations represents a suitable approach for understanding the role of Na(+) ions in aluminositicate solids and related inorganic-organic hybrids, particularly their specific arrangement and clustering at interfacial areas.
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Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Libor Kobera
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
- University of Ottawa , Department of Chemistry and CCRI, 10 Marie Curie Pvt. D'Iorio Hall, Ottawa, Ontario K1N6N5, Canada
| | - Martina Urbanova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Barbora Doušová
- University of Chemistry and Technology Prague , Technicka 5, Prague, Czech Republic
| | - Miloslav Lhotka
- University of Chemistry and Technology Prague , Technicka 5, Prague, Czech Republic
| | - David Koloušek
- University of Chemistry and Technology Prague , Technicka 5, Prague, Czech Republic
| | - Jiří Kotek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Pavel Čuba
- University of Chemistry and Technology Prague , Technicka 5, Prague, Czech Republic
| | - Jiri Czernek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiří Dědeček
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic , Dolejskova 2155/3, 182 23 Prague 8, Czech Republic
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Piscitelli F, Buonocore G, Lavorgna M, Verdolotti L, Pricl S, Gentile G, Mascia L. Peculiarities in the structure – Properties relationship of epoxy-silica hybrids with highly organic siloxane domains. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Urbanova M, Sturcova A, Kredatusova J, Brus J. Structural insight into the physical stability of amorphous Simvastatin dispersed in pHPMA: Enhanced dynamics and local clustering as evidenced by solid-state NMR and Raman spectroscopy. Int J Pharm 2015; 478:464-75. [DOI: 10.1016/j.ijpharm.2014.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 12/04/2014] [Accepted: 12/05/2014] [Indexed: 11/29/2022]
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14
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Brus J, Zhigunov A, Czernek J, Kobera L, Uchman M, Matějíček P. Control over the Self-Assembly and Dynamics of Metallacarborane Nanorotors by the Nature of the Polymer Matrix: A Solid-State NMR Study. Macromolecules 2014. [DOI: 10.1021/ma501117a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, v.v.i., Academy
of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Alexander Zhigunov
- Institute of Macromolecular Chemistry, v.v.i., Academy
of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Jiří Czernek
- Institute of Macromolecular Chemistry, v.v.i., Academy
of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Libor Kobera
- Institute of Macromolecular Chemistry, v.v.i., Academy
of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Mariusz Uchman
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128
40 Prague 2, Czech Republic
| | - Pavel Matějíček
- Department
of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128
40 Prague 2, Czech Republic
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15
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Seeni Meera KM, Murali Sankar R, Jaisankar SN, Mandal AB. Physicochemical Studies on Polyurethane/Siloxane Cross-Linked Films for Hydrophobic Surfaces by the Sol–Gel Process. J Phys Chem B 2013; 117:2682-94. [DOI: 10.1021/jp3097346] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kamal Mohamed Seeni Meera
- Polymer Division, Council of Scientific and Industrial Research (CSIR) − Central Leather Research Institute (CLRI), Adyar, Chennai 600020,
Tamil Nadu, India
| | - Rajavelu Murali Sankar
- Polymer Division, Council of Scientific and Industrial Research (CSIR) − Central Leather Research Institute (CLRI), Adyar, Chennai 600020,
Tamil Nadu, India
| | - Sellamuthu N. Jaisankar
- Polymer Division, Council of Scientific and Industrial Research (CSIR) − Central Leather Research Institute (CLRI), Adyar, Chennai 600020,
Tamil Nadu, India
| | - Asit Baran Mandal
- Polymer Division, Council of Scientific and Industrial Research (CSIR) − Central Leather Research Institute (CLRI), Adyar, Chennai 600020,
Tamil Nadu, India
- Chemical
Laboratory, Council of Scientific and Industrial Research (CSIR) − Central Leather Research Institute (CLRI), Adyar, Chennai 600020,
Tamil Nadu, India
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16
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Proks V, Brus J, Pop-Georgievski O, Večerníková E, Wisniewski W, Kotek J, Urbanová M, Rypáček F. Thermal-Induced Transformation of Polydopamine Structures: An Efficient Route for the Stabilization of the Polydopamine Surfaces. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201200505] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Domján A, Fodor C, Kovács S, Marek T, Iván B, Süvegh K. Anomalous Swelling Behavior of Poly(N-vinylimidazole)-l-Poly(tetrahydrofuran) Amphiphilic Conetwork in Water Studied by Solid-State NMR and Positron Annihilation Lifetime Spectroscopy. Macromolecules 2012. [DOI: 10.1021/ma301533g] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | | | - Szabolcs Kovács
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
| | - Tamás Marek
- Department
of Surface Modifications
and Nanostructures, Institute of Materials and Environmental Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525
Budapest, Hungary
| | | | - Károly Süvegh
- Department of Nuclear Chemistry, Eötvös Loránd Science University, P.O. Box 32, H-1518
Budapest, Hungary
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18
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Lázaro Martínez JM, Chattah AK, Torres Sánchez RM, Buldain GY, Campo Dall’ Orto V. Synthesis and characterization of novel polyampholyte and polyelectrolyte polymers containing imidazole, triazole or pyrazole. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.01.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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20
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Izumi A, Nakao T, Shibayama M. Synthesis and properties of a deuterated phenolic resin. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24948] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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22
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The influence of temperature and interface strength on the microstructure and performance of sol–gel silica–epoxy nanocomposites. Polym Bull (Berl) 2011. [DOI: 10.1007/s00289-011-0495-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Matějíček P, Brus J, Jigounov A, Pleštil J, Uchman M, Procházka K, Gradzielski M. On the Structure of Polymeric Composite of Metallacarborane with Poly(ethylene oxide). Macromolecules 2011. [DOI: 10.1021/ma200502t] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Pavel Matějíček
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Brus
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Alexander Jigounov
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Josef Pleštil
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
| | - Mariusz Uchman
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Karel Procházka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Michael Gradzielski
- Stranski-Laboratorium für Physikalische Chemie und Theoretische Chemie, Institut für Chemie, Sekr. TC 7, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany
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24
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Wu CH, Jeng JS, Chia JL, Ding S. Multi-nuclear liquid state NMR investigation of the effects of pH and addition of polyethyleneglycol on the long-term hydrolysis and condensation of tetraethoxysilane. J Colloid Interface Sci 2010; 353:124-30. [PMID: 20926094 DOI: 10.1016/j.jcis.2010.09.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Revised: 09/07/2010] [Accepted: 09/09/2010] [Indexed: 10/19/2022]
Abstract
The long-time behavior of the hydrolysis and condensation reaction of the tetraethoxysilane (TEOS) pre-solution at different pH values with and without addition of polyethyleneglycol (PEG) for various aging times was characterized by liquid (1)H, (13)C, and (29)Si NMR spectroscopy. After aging, the alcohol is released in the TEOS pre-solution without addition of PEG at pH 3 and 9. On the other hand, the hydrolysis and condensation rates of the TEOS pre-solutions with addition of PEG at pH 3 and 9 increase except for the TEOS pre-solution with addition of PEG 2000 at pH 9. However, the hydrolysis and condensation rates of the TEOS pre-solutions with and without addition of PEG at pH 5 and 7 are almost the same before and after aging. The effects of the pH values, polymer size and aging times on the hydrolysis and condensation reaction of the TEOS pre-solutions are discussed.
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Affiliation(s)
- Cheng-Hsien Wu
- Department of Chemistry and Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, 70 Lien-Hai Road, Kaohsiung 80424, Taiwan
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25
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Guilbaud JB, Baker H, Clark BC, Meehan E, Khimyak YZ. Effect of Encapsulating Arginine Containing Molecules on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2697-710. [DOI: 10.1002/jps.22019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Guilbaud JB, Clark BC, Meehan E, Hughes L, Saiani A, Khimyak YZ. Effect of Encapsulating a Pseudo-Decapeptide Containing Arginine on PLGA: A Solid-State NMR Study. J Pharm Sci 2010; 99:2681-96. [DOI: 10.1002/jps.22060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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27
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Kulagina TP, Manikin PS, Karnaukh GE, Smirnov LP. Statistical theory of NMR line shape for heterogeneous polymeric systems. DOKLADY PHYSICAL CHEMISTRY 2010. [DOI: 10.1134/s0012501610040044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Chen S, You B, Zhou S, Wu L. Preparation and characterization of scratch and mar resistant waterborne epoxy/silica nanocomposite clearcoat. J Appl Polym Sci 2009. [DOI: 10.1002/app.29865] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Domján A, Bajdik J, Pintye-Hódi K. Understanding of the Plasticizing Effects of Glycerol and PEG 400 on Chitosan Films Using Solid-State NMR Spectroscopy. Macromolecules 2009. [DOI: 10.1021/ma8021234] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Attila Domján
- Institute of Structural Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - János Bajdik
- Department of Pharmaceutical Technology, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Klára Pintye-Hódi
- Department of Pharmaceutical Technology, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
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30
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Li Y, Shimizu H. Toward a Stretchable, Elastic, and Electrically Conductive Nanocomposite: Morphology and Properties of Poly[styrene-b-(ethylene-co-butylene)-b-styrene]/Multiwalled Carbon Nanotube Composites Fabricated by High-Shear Processing. Macromolecules 2009. [DOI: 10.1021/ma802662c] [Citation(s) in RCA: 140] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yongjin Li
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Hiroshi Shimizu
- Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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31
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Gerbaud G, Hediger S, Bardet M, Favennec L, Zenasni A, Beynet J, Gourhant O, Jousseaume V. Spin-coated and PECVD low dielectric constant porous organosilicate films studied by 1D and 2D solid-state NMR. Phys Chem Chem Phys 2009; 11:9729-37. [DOI: 10.1039/b909654j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Maly M, Posocco P, Fermeglia M, Pricl S. Scripting approach in hybrid organic–inorganic condensation simulation: the GPTMS proof-of-concept. MOLECULAR SIMULATION 2008. [DOI: 10.1080/08927020802235706] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Marek Maly
- a Department of Physics , Faculty of Science, J.E. Purkinje University , Usti nad Labem, Czech Republic
- b Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic , Prague, Czech Republic
| | - Paola Posocco
- c Department of Chemical, Environmental and Raw Materials Engineering , University of Trieste , Trieste, Italy
| | - Maurizio Fermeglia
- c Department of Chemical, Environmental and Raw Materials Engineering , University of Trieste , Trieste, Italy
| | - Sabrina Pricl
- c Department of Chemical, Environmental and Raw Materials Engineering , University of Trieste , Trieste, Italy
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33
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Pan Y, Xu Y, An L, Lu H, Yang Y, Chen W, Nutt S. Hybrid Network Structure and Mechanical Properties of Rodlike Silicate/Cyanate Ester Nanocomposites. Macromolecules 2008. [DOI: 10.1021/ma800819s] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yongzheng Pan
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Yue Xu
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Li An
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Hongbin Lu
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Yuliang Yang
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Wei Chen
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
| | - Steven Nutt
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, and Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-0241
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34
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Wiench JW, Lin VSY, Pruski M. 29Si NMR in solid state with CPMG acquisition under MAS. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2008; 193:233-42. [PMID: 18538601 DOI: 10.1016/j.jmr.2008.05.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/08/2008] [Accepted: 05/11/2008] [Indexed: 05/18/2023]
Abstract
A remarkable enhancement of sensitivity can be often achieved in 29Si solid-state NMR by applying the well-known Carr-Purcell-Meiboom-Gill (CPMG) train of rotor-synchronized pi pulses during the detection of silicon magnetization. Here, several one- and two-dimensional (1D and 2D) techniques are used to demonstrate the capabilities of this approach. Examples include 1D 29Si{X} CPMAS spectra and 2D 29Si{X} HETCOR spectra of mesoporous silicas, zeolites and minerals, where X=1H or 27Al. Data processing methods, experimental strategies and sensitivity limits are discussed and illustrated by experiments. The mechanisms of transverse dephasing of 29Si nuclei in solids are analyzed. Fast magic angle spinning, at rates between 25 and 40 kHz, is instrumental in achieving the highest sensitivity gain in some of these experiments. In the case of 29Si-29Si double-quantum techniques, CPMG detection can be exploited to measure homonuclear J-couplings.
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Affiliation(s)
- J W Wiench
- U.S. DOE Ames Laboratory, Iowa State University, Ames, IA 50011, USA
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35
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Liu J, Wu C, Zhang P, Zhao S. Effects of Cyclohexylamine Modified Silica on the Mechanical Properties of Filled Natural Rubber. J MACROMOL SCI B 2008. [DOI: 10.1080/00222340802118846] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Jiwen Liu
- a Key Laboratory of Rubber‐Plastics (Qingdao University of Science and Technology) , Ministry of Education , Qingdao, People's Republic of China
| | - Chifei Wu
- b Polymer Alloy Laboratory , School of Materials Science and Technology , Shanghai, People's Republic of China
| | - Ping Zhang
- a Key Laboratory of Rubber‐Plastics (Qingdao University of Science and Technology) , Ministry of Education , Qingdao, People's Republic of China
| | - Shugao Zhao
- a Key Laboratory of Rubber‐Plastics (Qingdao University of Science and Technology) , Ministry of Education , Qingdao, People's Republic of China
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36
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Zheng K, Yao X, Chen L, Zheng J, Tian X, Li Y. Synthesis and Nonisothermal Crystallization Behavior of Poly(ethylene terephthalate)/Attapulgite Nanocomposites. J MACROMOL SCI B 2008. [DOI: 10.1080/00222340701792154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Kang Zheng
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
| | - XiaYin Yao
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
| | - Lin Chen
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
| | - Jin Zheng
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
| | - XingYou Tian
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
| | - Yong Li
- a Key Laboratory of Materials Physics , Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences , Hefei, P. R. China
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37
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Orlandini LF, Rodembusch FS, de Luca MA, Jacobi MM, Stefani V. New fluorescent elastomeric materials based on synthetic and natural epoxidized rubbers. J Appl Polym Sci 2008. [DOI: 10.1002/app.28114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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38
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Brus J, Urbanová M, Strachota A. Epoxy Networks Reinforced with Polyhedral Oligomeric Silsesquioxanes: Structure and Segmental Dynamics as Studied by Solid-State NMR. Macromolecules 2007. [DOI: 10.1021/ma702140g] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Martina Urbanová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic
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39
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Effect of polyvinylpyrrolidone on the ammonia-catalyzed sol–gel process of TEOS: Study by in situ 29Si NMR, scattering, and rheology. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2007.04.047] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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40
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Bonhomme C, Coelho C, Baccile N, Gervais C, Azaïs T, Babonneau F. Advanced solid state NMR techniques for the characterization of sol-gel-derived materials. Acc Chem Res 2007; 40:738-46. [PMID: 17461543 DOI: 10.1021/ar600030j] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A large array of advanced solid state NMR (nuclear magnetic resonance) techniques is presented in the frame of the structural characterization of sol-gel-derived materials. These techniques include the pertinent detection of (17)O chemical shifts, MAS (magic angle spinning) J spectroscopy in the solid state, high-resolution (1)H spectroscopy, heteronuclear and homonuclear D (dipolar)-derived multidimensional correlation experiments, and first-principles calculations of NMR parameters. This spectroscopic approach is suitable for the in-depth description of multicomponent sol-gel derivatives, crystalline and amorphous biocompatible silicophosphates, Al-O-P clusters, and templated porous materials. It offers unique perspectives for the description of the hybrid interfaces in terms of chemical and spatial connectivities.
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Affiliation(s)
- Christian Bonhomme
- Université Pierre et Marie Curie-Paris 6, CNRS UMR 7574, Laboratoire Chimie de la Matière Condensée de Paris, Paris, F-75005 France
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41
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Xu H, Liu J, Fang L, Wu C. In situ Grafting onto Silica Surface with Epoxidized Natural Rubber via Solid State Method. J MACROMOL SCI B 2007. [DOI: 10.1080/00222340701388854] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Haiyan Xu
- a Polymer Alloy Laboratory , School of Materials Science and Technology, East China University of Science and Technology , Shanghai, P. R. China
| | - Jiwen Liu
- b Key Laboratory of Rubber‐Plastic , Ministry of Education, Qingdao University of Science and Technology , Qingdao, P. R. China
| | - Liang Fang
- a Polymer Alloy Laboratory , School of Materials Science and Technology, East China University of Science and Technology , Shanghai, P. R. China
| | - Chifei Wu
- a Polymer Alloy Laboratory , School of Materials Science and Technology, East China University of Science and Technology , Shanghai, P. R. China
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42
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Ammonia Catalyzed Hydrolysis-Condensation Kinetics of Tetraethoxysilane/Dimethyldiethoxysilane Mixtures Studied by 29 Si NMR and SAXS. J SOLUTION CHEM 2007. [DOI: 10.1007/s10953-006-9117-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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43
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Brus J, Urbanová M, Kelnar I, Kotek J. A Solid-State NMR Study of Structure and Segmental Dynamics of Semicrystalline Elastomer-Toughened Nanocomposites. Macromolecules 2006. [DOI: 10.1021/ma0604946] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiri Brus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Martina Urbanová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Ivan Kelnar
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
| | - Jiří Kotek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Square 2, 162 06 Prague 6, Czech Republic
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44
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Chen X, Xu J, Lu H, Yang Y. Isothermal crystallization kinetics of poly(butylene terephthalate)/attapulgite nanocomposites. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/polb.20870] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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45
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Špírková M, Šlouf M, Bláhová O, Farkačová T, Benešová J. Submicrometer characterization of surfaces of epoxy-based organic–inorganic nanocomposite coatings. A comparison of AFM study with currently used testing techniques. J Appl Polym Sci 2006. [DOI: 10.1002/app.25218] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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UV Curable Acrylate Nanocomposites: Properties and Applications. JOURNAL OF POLYMER RESEARCH 2005. [DOI: 10.1007/s10965-005-4339-z] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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47
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Lu H, Shen H, Song Z, Shing KS, Tao W, Nutt S. Rod-Like Silicate-Epoxy Nanocomposites. Macromol Rapid Commun 2005. [DOI: 10.1002/marc.200500360] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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48
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Trebosc J, Wiench JW, Huh S, Lin VSY, Pruski M. Studies of Organically Functionalized Mesoporous Silicas Using Heteronuclear Solid-State Correlation NMR Spectroscopy under Fast Magic Angle Spinning. J Am Chem Soc 2005; 127:7587-93. [PMID: 15898810 DOI: 10.1021/ja0509127] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Highly resolved solid-state HETCOR NMR spectra between protons and low gamma nuclei ((13)C and (29)Si) can be suitably obtained on surfaces using a "brute force" (1)H-(1)H decoupling by MAS at rates > or =40 kHz. Despite a small rotor volume (<10 microL), a (1)H-(13)C HETCOR spectrum of allyl groups (AL, -CH(2)-CH=CH(2)) covalently anchored to the surface of MCM-41 silica was acquired without using isotope enrichment. The advantages of using fast MAS in such studies include easy setup, robustness, and the opportunity of using low RF power for decoupling. In the case of the (1)H-(29)Si HETCOR experiment, the sensitivity can be dramatically increased, in some samples by more than 1 order of magnitude, through implementing into the pulse sequence a Carr-Purcell-Meiboom-Gill train of pi pulses at the (29)Si spin frequency. The use of low-power heteronuclear decoupling is essential in the (1)H-(29)Si CPMG-HETCOR experiment, due to unusually long acquisition periods. These methods provided detailed structural characterization of the surface of AL-MCM mesoporous silica.
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