Two channel competitive photodecomposition reaction of ethyl bromide at 174.3-174.5 nm174.3-174.5 nm 진공 자외선에 의한 에틸브로 마이드의 광분해 반응

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dc.contributor.advisorJung, Kyung-Hoon-
dc.contributor.advisor정경훈-
dc.contributor.authorHwang, Jin-Soo-
dc.contributor.author황진수-
dc.date.accessioned2011-12-13T04:54:58Z-
dc.date.available2011-12-13T04:54:58Z-
dc.date.issued1982-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63284&flag=dissertation-
dc.identifier.urihttp://hdl.handle.net/10203/32334-
dc.description학위논문(석사) - 한국과학기술원 : 화학과, 1982.2, [ x, 42 p. ]-
dc.description.abstractA vacuum ultraviolet photolysis of ethyl bromide at 174.3-174.5 nm was studied over the pressure range of 0.2-38.2 torr at room temperature using a nitrogen resonance lamp. The pressure effect with and without He as an additive was investigated. A scavenger effect of the reaction was also observed by adding NO as a radical scavenger. The principal reaction products were $C_2H_4$, $C_2H_6$ and $CH_3CHBr_2$. Increasing pressure without He the product quantum yields, Φ, of $C_2H_4$ and $CH_3CHBr_2$ remain constant, while that of $C_2H_6$ was found to be weak positive pressure dependence. When the pressure of He was varied at a constant pressure of $C_2H_5Br$, however, the quantum yields of all products were found to be pressure independence. Addition of NO completely suppressed the formation of $C_2H_6$ and $CH_3CHBr_2$, and partially reduced that of $C_2H_4$. These results were interpreted in terms of two channel competition between the molecular eliminations and the formation of radicals. Two different decomposition modes were 20% molecular elimination and 80% radical reactions, respectively. From the aforementioned results, it is suggested that there exist two electronically excited states and that reactant molecule which absorbs a photon proceeds to any one of two different electronically excited states through one of two pathways. One of the electronically formed excited states plays a role as the main source of the molecular elimination products and the other state goes on the radical decomposition modes.eng
dc.languageeng-
dc.publisher한국과학기술원-
dc.titleTwo channel competitive photodecomposition reaction of ethyl bromide at 174.3-174.5 nm-
dc.title.alternative174.3-174.5 nm 진공 자외선에 의한 에틸브로 마이드의 광분해 반응-
dc.typeThesis(Master)-
dc.identifier.CNRN63284/325007-
dc.description.department한국과학기술원 : 화학과, -
dc.identifier.uid000801300-
dc.contributor.localauthorJung, Kyung-Hoon-
dc.contributor.localauthor정경훈-
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