CARBON DIOXIDE LASER INDUCED CHEMISTRY OF VANADIUM OXYTRICHLORIDE AND DICHLOROSILANE.
Item
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Title
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CARBON DIOXIDE LASER INDUCED CHEMISTRY OF VANADIUM OXYTRICHLORIDE AND DICHLOROSILANE.
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Identifier
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AAI8401909
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identifier
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8401909
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Creator
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SAUSA, ROSARIO C.
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Contributor
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Seymour Aronson | Louis Massa
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Date
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1983
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Language
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English
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Publisher
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City University of New York.
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Subject
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Chemistry, Physical
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Abstract
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Infrared CO(,2) laser induced chemistry of vanadium oxytrichloride (VOCl(,3)) and dichlorosilane (SiH(,2)Cl(,2)) was studied both on and off resonance and the results, along with the unique characteristics of each method, discussed.;Multiphoton excitation of VOCl(,3), under collisional and collision-free conditions, resulted in dissociation via its ground electronic state and in a visible fluorescence. The photodissociative pathways leading to product formation were found to be both pressure and laser fluence dependent. Low pressure and laser fluence led to the formation of VOCl(,2) while high pressure and laser fluence favored VO. The prompt fluorescence was also studied as a function of pressure and laser fluence, and was shown to arise from a spontaneous one-photon radiative decay from an electronic state belonging to the VOCl(,2) fragment.;A similar study conducted on SiH(,2)Cl(,2) revealed that SiCl(,2) + H(,2) were its photodissociative products under collisionless conditions. The observed ultraviolet luminescence was attributed to the electronically excited SiCl(,2) fragment.;The reaction mechanisms leading to product formation as well as models for populating a fragment's electronic state were proposed and discussed in conjunction with present multiphoton excitation and dissociation theory.;Dielectric breakdown and laser combustion methods were used to produce various vanadium oxides and silicon containing films from VOCl(,3) and SiH(,2)Cl(,2). The products, which were finely divided particles of very large surface area and high purity, may be used in numerous industrial applications.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Chemistry
