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Inokuchi Y, Ebata T, Rizzo TR. UV and IR Spectroscopy of Transition Metal–Crown Ether Complexes in the Gas Phase: Mn2+(benzo-15-crown-5)(H2O)0–2. J Phys Chem A 2019; 123:6781-6786. [DOI: 10.1021/acs.jpca.9b05706] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yoshiya Inokuchi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Takayuki Ebata
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Thomas R. Rizzo
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
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Conductometric study of complexation reaction between 15-crown-5 and Cr3+, Mn2+ and Zn2+ metal cations in pure and binary mixed organic solvents. J INCL PHENOM MACRO 2011. [DOI: 10.1007/s10847-011-0081-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Varadwaj PR, Varadwaj A, Peslherbe GH, Marques HM. Conformational Analysis of 18-Azacrown-6 and Its Bonding with Late First Transition Series Divalent Metals: Insight from DFT Combined with NPA and QTAIM Analyses. J Phys Chem A 2011; 115:13180-90. [DOI: 10.1021/jp206484m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pradeep R. Varadwaj
- Centre for Research in Molecular Modeling and Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada H4B 1R6
| | - Arpita Varadwaj
- Centre for Research in Molecular Modeling and Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada H4B 1R6
| | - Gilles H. Peslherbe
- Centre for Research in Molecular Modeling and Department of Chemistry & Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada H4B 1R6
| | - Helder M. Marques
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO Wits, Johannesburg 2050, South Africa
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Varadwaj PR, Varadwaj A, Marques HM. DFT-B3LYP, NPA-, and QTAIM-Based Study of the Physical Properties of [M(II)(H2O)2(15-crown-5)] (M = Mn, Fe, Co, Ni, Cu, Zn) Complexes. J Phys Chem A 2011; 115:5592-601. [DOI: 10.1021/jp2001157] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Pradeep R. Varadwaj
- Centre for Research in Molecular Modeling and Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada, H4B 1R6
| | - Arpita Varadwaj
- Centre for Research in Molecular Modeling and Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec, Canada, H4B 1R6
| | - Helder M. Marques
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, P.O. Wits, Johannesburg 2050, South Africa
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Ijeri VS, Nair JR, Gerbaldi C, Bongiovanni RM, Penazzi N. Metallopolymer capacitor in "one pot" by self-directed UV-assisted process. ACS APPLIED MATERIALS & INTERFACES 2010; 2:3192-3200. [PMID: 20949927 DOI: 10.1021/am1006639] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Silver metalized methacrylate films are prepared by single-step UV curing process with good conductivity on both sides. The major component of the composite is Bisphenol A ethoxylate dimethacrylate, which can be photopolymerized by a photoreactive initiator under UV light. Under the same conditions of UV irradiation, silver ions are deposited as metal nanoparticles while the pyrrole is oxidized to polypyrrole. The migration of silver ions and pyrrole toward both surfaces during polymerization leads to the formation of a metallo-polymer capacitor. The composite films are characterized by SEM-EDX and electrical measurements for possible applications as capacitors in flexible and/or nonplanar electronics.
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Affiliation(s)
- Vijaykumar S Ijeri
- Department of Materials Science and Chemical Engineering, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, Italy
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Inhibition of the activity of matrix metalloproteinase 2 by triethylene glycol dimethacrylate. Clin Oral Investig 2010; 15:643-8. [PMID: 20623151 DOI: 10.1007/s00784-010-0443-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 06/29/2010] [Indexed: 02/03/2023]
Abstract
The aim of this study was to evaluate the effect of different concentrations of triethylene glycol dimethacrylate (TEGDMA) on the inhibition of matrix metalloproteinase 2 (MMP-2). Mouse gingival explants were cultured overnight in DMEM and the expression of secreted enzymes was analyzed by gelatin zymography in buffers containing 5 mM CaCl(2) (Tris-CaCl(2)) in 50 mM Tris-HCl buffer with the addition of TEGDMA at different concentrations (0.62%, 1.25%, 2.5%, or 5.0% (v/v)). The gelatinolytic proteinase present in the conditioned media was characterized as matrix metalloproteinase by means of specific chemical inhibition. The matrix metalloproteinases present in the conditioned media were characterized as MMP-2 by immunoprecipitation. The eletrophoretic bands were scanned and the transmittance values were analyzed. Data was plotted and submitted to linear regression to investigate MMP-2 inhibition as a function of TEGDMA concentration. Three major bands were detected in the zymographic assays. These bands were characterized as MMP-2. Zymogene (72 kDa), intermediate (66 kDa) and active forms of MMP-2 (62 kDa) were inhibited by TEGDMA in a dose-dependent way. These findings suggest that TEGDMA could inhibit MMP-2 expression even at small concentrations.
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Sil A, Ijeri VS, Srivastava AK. Stability Constants of Some Macrocyclic Complexes of Ag(I) and Cu(II) in Mixed Solvents by Potentiometry. Supramol Chem 2010. [DOI: 10.1080/1061027031000154694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Aparna Sil
- a Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (E), 098, Maharashtra, Mumbai, India
| | - Vijaykumar S. Ijeri
- a Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (E), 098, Maharashtra, Mumbai, India
| | - Ashwini K. Srivastava
- a Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (E), 098, Maharashtra, Mumbai, India
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Behera N, Kumar MS, Elias AJ. Chemistry of cyclodicarbaphosphatriazene: Synthesis and structural studies of pentaerythritoxy-bridged and lariat ether type spirocyclic derivatives. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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KURAHASHI K, UMETANI S, SOHRIN Y. Solvent Extraction of Divalent Metal Ions with Azacrown Ether Substituted Acylpyrazolones. ANAL SCI 2008; 24:225-9. [DOI: 10.2116/analsci.24.225] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sil A, Srivastava AK. Studies on the Complexation of Transition Metal Ions with Macrocyclic Compounds in Mixed Solvents by Competitive Potentiometry and Polarography. Supramol Chem 2007. [DOI: 10.1080/1061027042000224658] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Aparna Sil
- a Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (E), Mumbai, 400 098, Maharashtra, India
| | - Ashwini K. Srivastava
- a Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (E), Mumbai, 400 098, Maharashtra, India
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Ijeri VS, Srivastava AK. Complexation of macrocyclic compounds with mono-, di- and tri-valent transition and heavy metal ions in 90% (v/v) DMSO+water medium. Polyhedron 2003. [DOI: 10.1016/s0277-5387(02)01418-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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