DDAP之合成與螢光關係應用在大氣中臭氧濃度之分析

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Title:	DDAP之合成與螢光關係應用在大氣中臭氧濃度之分析
Authors:	蕭柏岳;Bo-Yua Chiuo
Contributors:	化學工程與材料工程研究所
Keywords:	臭氧濃度;DDAP
Date:	2003-07-10
Issue Date:	2009-09-21 12:22:28 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	由於近幾十年來全球過度的使用氟氯碳化物，造成臭氧層的破洞，使得大氣中的臭氧濃度增加，逐漸的破壞空氣品質，對於生態環境有很大的影響，池浦太莊以簡易分子擴散補集器利用分子擴散的原理來進行臭氧濃度監測，使用對乙醯胺基苯酚溶液與臭氧反應成具螢光之溶液，藉由其螢光強度來測定大氣中臭氧的含量。無螢光性單分子之對位乙醯胺基苯酚被氧化後形成螢光性雙分子，當對乙醯胺基苯酚在硼酸或碳氫酸鉀緩衝液中，由氧化劑赤血鹽作用即可得螢光性雙分子，但在氧化的過程中，有可能會接成三分子或是更多之大分子，鑑定生成之螢光化合物的構造，探討合成條件，如反應液、氧化劑等，及生成物之精製與螢光性質等，作為以後分析大氣中臭氧濃度測定依據。以各種不同氧化劑來氧化縮合對位乙醯胺基苯酚，大部分可得螢光性化合物，測熔點發現與文獻值差異很大，將鐵氰化鉀氧化縮合得到的螢光性化合物，以IR、NMR、Mass分析鑑定後，可確定為聯苯之螢光雙分子(DDAP)。將DDAP精製後作螢光分析，以硼酸緩衝液為溶劑所得的實驗關係式為FI(L)＝39.6【μM】DDAP＋12.6，與洗滌吸收液測得之螢光強度以及監測站測得之臭氧濃度比較後，可得下列關係式，用來對臭氧濃度定量。 O3(μM)＝， O3(ppb)＝。1 mole臭氧濃度以洗滌吸收液測得之螢光強度，只有1 mole DDAP測得螢光強度之0.59倍。 (FI(L,sampling))/0.5919-12.6 39.6 (FI(L,sampling))/0.5919-12.6 2.122 Ozone concentration was increasing with overusing Hydrochlorofluorocarbons, destroyed the ecological environment progressively. Taispoh IKEURA was using simple sampler to measure the concentration of Ozone by florescent intensity of p-Acetamidophenol solution after sampling. p-Acetamidophenol was oxidized by Potassium ferricyanide in buffer solution. In the process of oxidation, p-Acetamidophenol may become diemer or trimer and polymer. To identify structure of compound(DDAP), to analyze the florescent intensity of DDAP, in order to get a formula using to measure the concentration of ozone in atmosphere. Using different oxidants( Potassium ferricyanide,Hydrogen peroxide ) can get DDAP after reaction. The melt point of DDAP has great difference to records. We can confirm DDAP is dimmer by analyze of IR and NMR and Mass. DDAP recrystallise from MeOH and dissolve in buffer solution. We can get an equation after analyzing florescent intensity. FI(L)＝39.6【μM】DDAP＋12.6 Compare with the florescent intensity measured by simple sampler and concentration of ozone from atmospheres monitor station. A useful equation to get concentration of ozone can be obtained. O3(μM)＝， O3(ppb)＝。The florescent intensity of 1 mole concentration of ozone is 0.59 times amount of 1 mole DDAP. 39.6 (FI(L,sampling))/0.5919-12.6 (FI(L,sampling))/0.5919-12.6 2.122
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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