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Bhattacharyya K, Kumar A, Tyagi D, Tripathi AK, Tyagi AK. Role of Constituent Oxides for Thermal Mineralization of o-Dichloro Benzene over Mixed-Oxide-TiO 2 Catalysts: A Mechanistic Explanation. Chemphyschem 2024; 25:e202300472. [PMID: 38487944 DOI: 10.1002/cphc.202300472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 03/14/2024] [Indexed: 04/23/2024]
Abstract
Catalysts with V2O5, WO3 and V2O5-WO3 dispersed over TiO2 were synthesized using sol-gel technique and thoroughly characterized by various techniques. The catalysts were evaluated for degradation of ortho-dichloro benzene (o-DCB) in air/helium, a representative probe molecule for polychlorinated dibenzo-para-dioxin and polychlorinated dibenzofuran by employing in situ Fourier-transform infrared spectroscopy (FT-IR spectroscopy). Different intermediate species formed on the surface of the TiO2 supported catalysts through of interaction of sorbate molecules with the lattice and/or gaseous oxygen were investigated in detail. Analysis of vibrational bands, observed during sorption of o-DCB and o-DCB-air mixture as a function of temperature over these catalysts, delineated the role of surface intermediate species such as phenolate, enolates, maleates, carboxylates, carbonates in mineralization of o-DCB. Nature and stability of intermediate species, found to be different over these catalysts, were able to elucidate the catalytic activity trend.
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Affiliation(s)
- Kaustava Bhattacharyya
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
- Homi Bhabha National Institute, Mumbai, 400 094, India
| | - Adarsh Kumar
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
- Homi Bhabha National Institute, Mumbai, 400 094, India
| | - Deepak Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
| | - A K Tripathi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
- Homi Bhabha National Institute, Mumbai, 400 094, India
| | - A K Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India
- Homi Bhabha National Institute, Mumbai, 400 094, India
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Occurrence, analysis and removal of pesticides, hormones, pharmaceuticals, and other contaminants in soil and water streams for the past two decades: a review. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04778-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Kanan SM, Moyet MA. Fabricated metal zeolites as photocatalysts for the degradation of organic pollutants. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04416-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Schmidbaur H, Raubenheimer HG. Excimer and Exciplex Formation in Gold(I) Complexes Preconditioned by Aurophilic Interactions. Angew Chem Int Ed Engl 2020; 59:14748-14771. [PMID: 32022383 PMCID: PMC7496071 DOI: 10.1002/anie.201916255] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Indexed: 11/23/2022]
Abstract
Excimers and exciplexes are defined as assemblies of atoms or molecules A/A' where interatomic/intermolecular bonding appears only in excited states such as [A2 ]* (for excimers) and [AA']* (for exciplexes). Their formation has become widely known because of their role in gas-phase laser technologies, but their significance in general chemistry terms has been given little attention. Recent investigations in gold chemistry have opened up a new field of excimer and exciplex chemistry that relies largely on the preorganization of gold(I) compounds (electronic configuration AuI (5d10 )) through aurophilic contacts. In the corresponding excimers, a new type of Au⋅⋅⋅Au bonding arises, with bond energies and lengths approaching those of ground-state Au-Au bonds between metal atoms in the Au0 (5d10 6s1 ) and AuII (5d9 ) configurations. Excimer formation gives rise to a broad range of photophysical effects, for which some of the relaxation dynamics have recently been clarified. Excimers have also been shown to play an important role in photoredox binuclear gold catalysis.
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Affiliation(s)
- Hubert Schmidbaur
- Department ChemieTechnische Universität MünchenLichtenbergstr. 485747GarchingGermany
| | - Helgard G. Raubenheimer
- Department of Chemistry and Polymer ScienceUniversity of StellenboschPrivate Bag X1Matieland7602South Africa
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Schmidbaur H, Raubenheimer HG. Excimer‐ und Exciplex‐Bildung in durch aurophile Wechselwirkungen präkonditionierten Gold(I)‐ Komplexen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hubert Schmidbaur
- Department Chemie Technische Universität München Lichtenbergstr. 4 85747 Garching Deutschland
| | - Helgard G. Raubenheimer
- Department of Chemistry and Polymer Science University of Stellenbosch Private Bag X1 Matieland 7602 Südafrika
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Salih FE, Achiou B, Ouammou M, Bennazha J, Ouarzane A, Younssi SA, El Rhazi M. Electrochemical sensor based on low silica X zeolite modified carbon paste for carbaryl determination. J Adv Res 2017; 8:669-676. [PMID: 28948047 PMCID: PMC5602751 DOI: 10.1016/j.jare.2017.08.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 12/02/2022] Open
Abstract
A new and simple approach for carbaryl determination in natural sample was proposed using Low Silica X (LSX) zeolite modified carbon paste electrode. LSX zeolite with a porous structure was incorporated into carbon paste electrode in the appropriate portion. The prepared electrode was then characterized using scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Various experimental parameters as the zeolite amounts, pH, accumulation time, and differential pulse voltammetric parameters were optimized. Under optimal conditions, a linear response was obtained in the range of 1-100 µM of carbaryl using differential pulse voltammetry with detection limit of 0.3 µM (S/N = 3). The sensors showed good selectivity, stability, and reproducibility and has been successfully applied for detection of carbaryl in tomato samples with good recoveries.
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Affiliation(s)
| | | | | | | | | | | | - Mama El Rhazi
- Laboratory of Materials, Membranes and Environment, Faculty of Sciences and Technologies, University Hassan II of Casablanca, BP 146, Mohammedia 20650, Morocco
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Ahern J, Kanan S, Sara Z, Job T, Alnaizy R, Abu Farha N, Patterson H. Photocatalysis of fenoxycarb over silver-modified zeolites. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:3186-3192. [PMID: 24562452 DOI: 10.1007/s11356-014-2621-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 02/03/2014] [Indexed: 06/03/2023]
Abstract
Two samples of silver doped into zeolite Y were prepared and characterized. ICP and SEM-EDS analysis indicate that the AgY1 sample contains twice the amount of silver compared to the AgY2 sample. Solid state luminescence spectroscopy shows variations in the emission modes of the site-selective luminescence where various luminophores might be excited upon selecting the proper excitation energy. The selected material effectively decomposed the pesticide fenoxycarb in aqueous solution. The photodecomposition of fenoxycarb reached 80 % upon irradiation for 60 min in the presence of the AgY1 catalyst. 2-(4-Phenoxy-phenoxy)ethyl] carbamic acid (1) and 1-amine-2-(phenoxy-4-ol) ethane (2) were identified as products for both uncatalyzed solution and the catalyzed fenoxycarb with AgY2 catalyst. Whereas, compound (2) was the only product identified in the catalyzed reaction with AgY1.
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Affiliation(s)
- John Ahern
- Department of Chemistry, University of Maine, Orono, ME, 04469, USA
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Ahern JC, Kanan S, Patterson HH. Heterogeneous Photocatalysis with Nanoclusters of D10Metal Ions Doped in Zeolites. COMMENT INORG CHEM 2014. [DOI: 10.1080/02603594.2014.973106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kehr NS, Ergün B, Lülf H, De Cola L. Spatially controlled channel entrances functionalization of zeolites L. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:3248-3252. [PMID: 24510774 DOI: 10.1002/adma.201305745] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 12/23/2013] [Indexed: 06/03/2023]
Abstract
The spatially controlled channel entrances functionalization of disk shaped zeolite L crystals is described. Fluorescent dye or bioactive molecules are immobilized at one end of the channels of zeolite crystals and subsequently the other side of the crystals is derivatized with magnetic iron oxide nanoparticles. The asymmetrically functionalized crystals were used for the control of the movement of bacteria in solution.
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Affiliation(s)
- Nermin Seda Kehr
- Institut für Biochemie, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str.2, D-48149, Münster, Germany
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Welch D, Baril-Robert F, Li X, Patterson HH. Luminescence and simulation of mixed metal nanoclusters of dicyanoargentate(I) and dicyanoaurate(I) in alkali halides. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.01.076] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Baril-Robert F, Palla V, Li X, Yson R, Patterson HH. Observation of a mixed-metal transition in a d8–d10 heterobimetallic Pt–Ag cyanide system: Experimental and theoretical study. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kehr NS, Schäfer A, Ravoo BJ, De Cola L. Asymmetric printing of molecules and zeolites on self assembled monolayers. NANOSCALE 2010; 2:601-605. [PMID: 20644765 DOI: 10.1039/b9nr00285e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Microcontact printing (mCP) is used to immobilize dyes and peptides asymmetrically, by a "peptide coupling" reaction, on monolayers of zeolite L crystals in the contact area between the stamp and the surface of the monolayer. Chemically patterned surfaces of monolayers of zeolite L crystals are obtained by using patterned stamps with different ink solutions. Additional printing of functionalized nano-objects on SAMs of zeolite L crystals is demonstrated.
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Affiliation(s)
- Nermin Seda Kehr
- Physikalisches Institut and CeNTech, Westfälische Wilhelms-Universität Münster, Mendelstrasse 7, 48149 Münster, Germany
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Chapter 1 Applications of Photoluminescence Spectroscopy to the Investigation of Oxide‐Containing Catalysts in the Working State. ADVANCES IN CATALYSIS 2009. [DOI: 10.1016/s0360-0564(08)00001-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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14
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Patterson HH, Gomez RS, Lu H, Yson RL. Nanoclusters of silver doped in zeolites as photocatalysts. Catal Today 2007. [DOI: 10.1016/j.cattod.2006.07.057] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Reddy VR, Currao A, Calzaferri G. Zeolite A and zeolite L monolayers modified with AgCl as photocatalyst for water oxidation to O2. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b705219g] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Bein T. Host–Guest Interactions in Zeolites and Periodic Mesoporous Materials. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)80806-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Kanan SM, Kanan MC, Patterson HH. Silver nanoclusters doped in X and mordenite zeolites as heterogeneous catalysts for the decomposition of carbamate pesticides in solution. RESEARCH ON CHEMICAL INTERMEDIATES 2006. [DOI: 10.1163/156856706778938437] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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18
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Mendizabal F, Olea-Azar C, Briones R. Theoretical study on the electronic spectrum of (M=Au(I), Ag(I); n=1–3) complexes. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2006.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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19
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Evidence for the adsorption of K+Ag(CN)2- ion pairs on carbon surface by XANES spectroscopy. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2005.12.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Jia Y, Thomas KM. Observation of the Adsorption of K+Au(CN)2- Ion Pairs on the Surface of Nanoporous Carbon by XANES. J Phys Chem B 2004. [DOI: 10.1021/jp0378900] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongfeng Jia
- Department of Chemistry, University of Newcastle, Newcastle upon Tyne, NE1 7RU, United Kingdom
| | - K. Mark Thomas
- Department of Chemistry, University of Newcastle, Newcastle upon Tyne, NE1 7RU, United Kingdom
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Kanan MC, Kanan SM, Austin RN, Patterson HH. Photodecomposition of carbaryl in the presence of silver-doped zeolite Y and Suwannee River natural organic matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2003; 37:2280-2285. [PMID: 12785537 DOI: 10.1021/es026136+] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The synthesis and characterization of a novel catalyst for the photodecomposition of carbaryl (1-naphthyl, N-methylcarbamate) is reported. In the absence of a catalyst, but in the presence of UV light a 30 ppm solution of carbaryl decomposes with a first-order rate constant of (5.6 +/- 0.3) x 10(-5) s(-1) (298 K) and a quantum efficiency of 4.8 x 10(-3) molecules/photon. In the presence of the Ag-zeolite Y catalyst with 2.42% Ag by weight, the photodecomposition rate becomes 80 times faster. The addition of Suwannee River natural organic matter (NOM), which can inactivate photocatalysts, has a minimal effect on this system. In the presence of three different concentrations of NOM and 30 ppm carbaryl, our results indicate that the NOM increases or decreases the catalytic photodecomposition rate by only a factor of 3 at most.
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Affiliation(s)
- Marsha C Kanan
- Department of Chemistry and Laboratory for Surface Science & Technology, University of Maine, Orono, Maine 04469, USA
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Jia Y, Zhu Q, Thomas K. Nitrogen K-shell excitations in gold(I) and silver(I) dicyanide KM(CN)2 (M=Au, Ag) by XANES spectroscopy. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00214-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Calzaferri G, Leiggener C, Glaus S, Schürch D, Kuge K. The electronic structure of Cu+, Ag+, and Au+ zeolites. Chem Soc Rev 2003; 32:29-37. [PMID: 12596543 DOI: 10.1039/b108571a] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of procedures have been used to prepare d10-zeolite materials. The electronic structure of these materials can be regarded to a first approximation as a superposition of the framework, of the charge compensating ions, of solvent molecules and of guest species. Zeolite oxygen to d10-ion charge transfer transitions dominate the electronic spectra if the ions coordinate to the zeolite oxygens. Specific coordination sites can influence the energy and the intensity of these transitions remarkably. Intra guest transitions dominate in quantum dot materials, as discussed in detail for luminescent Ag2S zeolite A. The zeolite is not needed for the photocatalytic water oxidation on Ag+/AgCl photo anodes with visible light. It can, however, be used to increase the active surface area substantially.
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Affiliation(s)
- Gion Calzaferri
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
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Hettiarachchi SR, Rawashdeh-Omary MA, Kanan SM, Omary MA, Patterson HH, Tripp CP. Spectroscopic Studies of “Exciplex Tuning” for Dicyanoaurate(I) Ions Doped in Potassium Chloride Crystals. J Phys Chem B 2002. [DOI: 10.1021/jp0209594] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Samanthika R. Hettiarachchi
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
| | - Manal A. Rawashdeh-Omary
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
| | - Sofian M. Kanan
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
| | - Mohammad A. Omary
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
| | - Howard H. Patterson
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
| | - Carl P. Tripp
- Department of Chemistry, University of Maine, Orono, Maine 04469, Department of Chemistry, P.O. Box 305070, University of North Texas, Denton, Texas 76203, and Laboratory for Surface Science and Technology, University of Maine, Orono, Maine 04469
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