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Rajaboopathi S, Thambidurai S. Evaluation of UPF and antibacterial activity of cotton fabric coated with colloidal seaweed extract functionalized silver nanoparticles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 183:75-87. [DOI: 10.1016/j.jphotobiol.2018.04.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/27/2018] [Accepted: 04/15/2018] [Indexed: 12/18/2022]
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2
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Kirubaharan CJ, Kalpana D, Lee YS, Kim AR, Yoo DJ, Nahm KS, Kumar GG. Biomediated Silver Nanoparticles for the Highly Selective Copper(II) Ion Sensor Applications. Ind Eng Chem Res 2012. [DOI: 10.1021/ie3003232] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Joseph Kirubaharan
- Department of Physical Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamilnadu,
India
| | - D. Kalpana
- Department of Forest
Science
and Technology, Institute of Agricultural Science and Technology, Chonbuk National University, Jeonju 561-756, South
Korea
| | - Yang Soo Lee
- Department of Forest
Science
and Technology, Institute of Agricultural Science and Technology, Chonbuk National University, Jeonju 561-756, South
Korea
| | - A. R. Kim
- Department of Hydrogen
and Fuel
Cells Engineering, Specialized Graduate School, Chonbuk National University, Jeonju 561-756, South Korea
| | - Don Jin Yoo
- Department of Hydrogen
and Fuel
Cells Engineering, Specialized Graduate School, Chonbuk National University, Jeonju 561-756, South Korea
| | - Kee Suk Nahm
- Department of Hydrogen
and Fuel
Cells Engineering, Specialized Graduate School, Chonbuk National University, Jeonju 561-756, South Korea
| | - G. Gnana Kumar
- Department of Physical Chemistry, Madurai Kamaraj University, Madurai-625 021, Tamilnadu,
India
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Affiliation(s)
- Ira A. Weinstock
- Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
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Geletii YV, Hill CL, Atalla RH, Weinstock IA. Reduction of O2 to Superoxide Anion (O2•-) in Water by Heteropolytungstate Cluster-Anions. J Am Chem Soc 2006; 128:17033-42. [PMID: 17177455 DOI: 10.1021/ja064244g] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fundamental information concerning the mechanism of electron transfer from reduced heteropolytungstates (POM(red)) to O2, and the effect of donor-ion charge on reduction of O2 to superoxide anion (O2.-), is obtained using an isostructural series of 1e--reduced donors: alpha-X(n+)W12O40(9-n)-, X(n+) = Al3+, Si4+, P5+. For all three, a single rate expression is observed: -d[POM(red)]/dt = 2k12[POM(red)][O2], where k12 is for the rate-limiting electron transfer from POM(red) to O2. At pH 2 (175 mM ionic strength), k12 increases from 1.4 +/- 0.2 to 8.5 +/- 1 to 24 +/- 2 M-1s-1 as Xn+ is varied from P5+ (3red) to Si4+ (2red) to Al3+ (1red). Variable-pH data (for 1red) and solvent-kinetic isotope (KIE = kH/kD) data (all three ions) indicate that protonated superoxide (HO2.) is formed in two steps--electron transfer, followed by proton transfer (ET-PT mechanism--rather than via simultaneous proton-coupled electron transfer (PCET). Support for an outersphere mechanism is provided by agreement between experimental k12 values and those calculated using the Marcus cross relation. Further evidence is provided by the small variation in k12 observed when Xn+ is changed from P5+ to Si4+ to Al3+, and the driving force for formation of O2.- (aq), which increases as cluster-anion charge becomes more negative, increases by nearly +0.4 V (a decrease of >9 kcal mol-1 in DeltaG degrees ). The weak dependence of k12 on POM reduction potentials reflects the outersphere ET-PT mechanism: as the anions become more negatively charged, the "successor-complex" ion pairs are subject to larger anion-anion repulsions, in the order [(3(ox)3-)(O2.-)]4- < [(2(ox)4-)(O2.-)]5- < [(1(ox)5-)(O2.-)]6-. This reveals an inherent limitation to the use of heteropolytungstate charge and reduction potential to control rates of electron transfer to O2 under turnover conditions in catalysis.
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Affiliation(s)
- Yurii V Geletii
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
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Gingras J, Déry JP, Yockell-Lelièvre H, Borra E, Ritcey AM. Surface films of silver nanoparticles for new liquid mirrors. Colloids Surf A Physicochem Eng Asp 2006. [DOI: 10.1016/j.colsurfa.2005.12.043] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Goldstein S, Samuni A, Hideg K, Merenyi G. Structure−Activity Relationship of Cyclic Nitroxides as SOD Mimics and Scavengers of Nitrogen Dioxide and Carbonate Radicals. J Phys Chem A 2006; 110:3679-85. [PMID: 16526651 DOI: 10.1021/jp056869r] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthetic nitroxide antioxidants attenuate oxidative damage in various experimental models. Their protective effect reportedly depends on ring size and ring substituents and is greater for nitroxides having lower oxidation potential. The present study focuses on the kinetics and mechanisms of the reactions of piperidine, pyrrolidine and oxazolidine nitroxides with HO2*/O2*-, *NO2 and CO3*- radicals, which are key intermediates in many inflammatory and degenerative diseases. It is demonstrated that nitroxides are the most efficient scavengers of *NO2 at physiological pH (k = (3-9) x 10(8) M(-1) s(-1)) and among the most effective metal-independent scavengers of CO3*- radicals (k = (2 - 6) x 10(8) M(-1) s(-1)). Their reactivity toward HO2*, though not toward *NO2 and CO3*-, depends on the nature of the ring side-chain and particularly on the ring-size. All nitroxide derivatives react slowly with O2*- and are relatively inefficient SOD mimics at physiological pH. Even piperidine nitroxides, having the highest SOD-like activity, demonstrate a catalytic activity of about 1000-fold lower than that of native SOD at pH 7.4. The present results do not indicate any correlation between the kinetics of HO2*/O2*-, *NO2 and CO3*- removal by nitroxides and their protective activity against biological oxidative stress and emphasize the importance of target-oriented nitroxides, i.e., interaction between the biological target and specific nitroxides.
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Affiliation(s)
- Sara Goldstein
- Department of Physical Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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Xiao C, Palmer DA, Wesolowski DJ, Lovitz SB, King DW. Carbon dioxide effects on luminol and 1,10-phenanthroline chemiluminescence. Anal Chem 2002; 74:2210-6. [PMID: 12033328 DOI: 10.1021/ac015714m] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Luminol and 1,10-phenanthroline are widely used chemiluminescent (CL) reagents for the analysis of a wide range of metals and inorganic and organic complexes. While the fundamental mechanism for luminol and 1,10-phenantholine chemiluminescence is understood, the analytical application of these reagents is largely empirical and often poorly described mechanistically. For example, CL signals observed from metal-luminol systems are strongly dependent on the pH of the sample, even though the final pH of the reaction mixture is controlled to a narrow range by a buffer. Other investigators report significant changes in CL signal due to freshness and the acidity of reagents. Our work shows that many of these effects are due to dissolved CO2 present or formed in the analytical system. The hypothesis that carbon dioxide plays a pivotal role in enhancing luminol CL is supported by direct manipulation of CO2(aq) concentrations by the addition of CO2(g) or carbonic anhydrase. In contrast, Cu(II) analysis using the CL reagent 1,10-phenanthroline is completely quenched in the presence of CO2(aq). A plausible mechanism for these observations involves the reaction between superoxide, produced in these analytical systems, and CO2(aq) to form the peroxycarbonate radical, *C04-. The formation of *CO4- has very important analytical implications since this species appears to enhance or quench the CL signal from luminol and 1,10-phenanthroline, respectively.
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Affiliation(s)
- Caibin Xiao
- Chemical Sciences Division, Oak Ridge National Laboratory, Tennessee 37831-6110, USA
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Hirakawa T, Kominami H, Ohtani B, Nosaka Y. Mechanism of Photocatalytic Production of Active Oxygens on Highly Crystalline TiO2 Particles by Means of Chemiluminescent Probing and ESR Spectroscopy. J Phys Chem B 2001. [DOI: 10.1021/jp0112929] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tsutomu Hirakawa
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-2188, Japan, Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-0818, Japan, and Catalysis Research Center, Hokkaido University, Sapporo 060-0811, Japan
| | - Hiroshi Kominami
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-2188, Japan, Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-0818, Japan, and Catalysis Research Center, Hokkaido University, Sapporo 060-0811, Japan
| | - Bunsho Ohtani
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-2188, Japan, Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-0818, Japan, and Catalysis Research Center, Hokkaido University, Sapporo 060-0811, Japan
| | - Yoshio Nosaka
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-2188, Japan, Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, Higashi-Osaka, Osaka 577-0818, Japan, and Catalysis Research Center, Hokkaido University, Sapporo 060-0811, Japan
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Kulmala S, Ala-Kleme T, Kulmala A, Papkovsky D, Loikas K. Cathodic Electrogenerated Chemiluminescence of Luminol at Disposable Oxide-Covered Aluminum Electrodes. Anal Chem 1998. [DOI: 10.1021/ac970954g] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Kulmala
- Department of Chemistry, University of Turku, FIN-20014 Finland, and Department of Biochemistry, University College, Cork, Ireland
| | - T. Ala-Kleme
- Department of Chemistry, University of Turku, FIN-20014 Finland, and Department of Biochemistry, University College, Cork, Ireland
| | - A. Kulmala
- Department of Chemistry, University of Turku, FIN-20014 Finland, and Department of Biochemistry, University College, Cork, Ireland
| | - D. Papkovsky
- Department of Chemistry, University of Turku, FIN-20014 Finland, and Department of Biochemistry, University College, Cork, Ireland
| | - K. Loikas
- Department of Chemistry, University of Turku, FIN-20014 Finland, and Department of Biochemistry, University College, Cork, Ireland
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Mãtãchescu C, Kulmala S, Ala-Kleme T, Joela H. Mechanism and Analytical Applicability of Luminol-Specific Extrinsic Lyoluminescence of UV-Irradiated Potassium Peroxodisulfate. Anal Chem 1997. [DOI: 10.1021/ac9611733] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cristina Mãtãchescu
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Republicii 13, 70346, Bucharest, Romania, Department of Chemistry, University of Turku, FIN-20014 Turku, Finland, and Department of Chemistry, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
| | - Sakari Kulmala
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Republicii 13, 70346, Bucharest, Romania, Department of Chemistry, University of Turku, FIN-20014 Turku, Finland, and Department of Chemistry, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
| | - Timo Ala-Kleme
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Republicii 13, 70346, Bucharest, Romania, Department of Chemistry, University of Turku, FIN-20014 Turku, Finland, and Department of Chemistry, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
| | - Heikki Joela
- Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Republicii 13, 70346, Bucharest, Romania, Department of Chemistry, University of Turku, FIN-20014 Turku, Finland, and Department of Chemistry, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
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Nosaka Y, Yamashita Y, Fukuyama H. Application of Chemiluminescent Probe to Monitoring Superoxide Radicals and Hydrogen Peroxide in TiO2 Photocatalysis. J Phys Chem B 1997. [DOI: 10.1021/jp970400h] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshio Nosaka
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-21, Japan
| | - Yoshifumi Yamashita
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-21, Japan
| | - Hiroshi Fukuyama
- Department of Chemistry, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-21, Japan
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Easton PM, Simmonds AC, Rakishev A, Egorov AM, Candeias LP. Quantitative Model of the Enhancement of Peroxidase-Induced Luminol Luminescence. J Am Chem Soc 1996. [DOI: 10.1021/ja9605073] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patricia M. Easton
- Contribution from Amersham International plc, White Lion Road, Amersham, Buckinghamshire HP7 9LL, U.K., Department of Chemistry, Moscow State University, Moscow 119899, Russia, and Gray Laboratory Cancer Research Trust, Northwood, Middlesex HA6 2JR, U.K
| | - Adrian C. Simmonds
- Contribution from Amersham International plc, White Lion Road, Amersham, Buckinghamshire HP7 9LL, U.K., Department of Chemistry, Moscow State University, Moscow 119899, Russia, and Gray Laboratory Cancer Research Trust, Northwood, Middlesex HA6 2JR, U.K
| | - Askar Rakishev
- Contribution from Amersham International plc, White Lion Road, Amersham, Buckinghamshire HP7 9LL, U.K., Department of Chemistry, Moscow State University, Moscow 119899, Russia, and Gray Laboratory Cancer Research Trust, Northwood, Middlesex HA6 2JR, U.K
| | - Alexey M. Egorov
- Contribution from Amersham International plc, White Lion Road, Amersham, Buckinghamshire HP7 9LL, U.K., Department of Chemistry, Moscow State University, Moscow 119899, Russia, and Gray Laboratory Cancer Research Trust, Northwood, Middlesex HA6 2JR, U.K
| | - Luis P. Candeias
- Contribution from Amersham International plc, White Lion Road, Amersham, Buckinghamshire HP7 9LL, U.K., Department of Chemistry, Moscow State University, Moscow 119899, Russia, and Gray Laboratory Cancer Research Trust, Northwood, Middlesex HA6 2JR, U.K
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O'Sullivan DW, Lee M, Noone BC, Heikes BG. Henry's Law Constant Determinations for Hydrogen Peroxide, Methyl Hydroperoxide, Hydroxymethyl Hydroperoxide, Ethyl Hydroperoxide, and Peroxyacetic Acid. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp951168n] [Citation(s) in RCA: 130] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel W. O'Sullivan
- Rosenstiel School of Marine and Atmospheric Sciences, Marine and Atmospheric Chemistry Division, University of Miami, Miami, Florida 33149
| | - Meehye Lee
- Graduate School of Oceanography, Center for Atmospheric Chemistry, University of Rhode Island, Narragansett, Rhode Island 02882
| | - Birgitta C. Noone
- Graduate School of Oceanography, Center for Atmospheric Chemistry, University of Rhode Island, Narragansett, Rhode Island 02882
| | - Brian G. Heikes
- Graduate School of Oceanography, Center for Atmospheric Chemistry, University of Rhode Island, Narragansett, Rhode Island 02882
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Farbman I, Levi O, Efrima S. Optical response of concentrated colloids of coinage metals in the near‐ultraviolet, visible, and infrared regions. J Chem Phys 1992. [DOI: 10.1063/1.462888] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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