甘氨酸與Cu(Ⅱ)配位反應(yīng)的動力學研究

材料科學論文編號:CL057  論文字數(shù):11238,頁數(shù):28

目  錄
中文摘要……………………………………………………………………………I
英文摘要……………………………………………………………………………II
目錄…………………………………………………………………………………III
1. 緒論………………………………………………………………………………1
 1.1 甘氨酸螯合物的概述…………………………………………………………1
 1.1.1 銅的作用…………………………………………………………………1
 1.1.2 甘氨酸的作用……………………………………………………………2
 1.1.3 甘氨酸銅配合物的分子結(jié)構(gòu)……………………………………………3
 1.2 甘氨酸銅的合成………………………………………………………………3
 1.2.1固相法……………………………………………………………………3
 1.2.2液相法……………………………………………………………………4
 1.3甘氨酸銅的研究進展 …………………………………………………………4
 1.3.1 甘氨酸螯合銅的發(fā)展及優(yōu)勢……………………………………………4
 1.3.2 立題意義…………………………………………………………………5
2 實驗部分……………………………………………………………………………6
 2.1 試劑與儀器……………………………………………………………………6
 2.1.1 試劑………………………………………………………………………6
 2.1.2 儀器………………………………………………………………………6
 2.2 實驗方法………………………………………………………………………6
 2.2.1 緩沖溶液的配置…………………………………………………………6
 2.2.2 貯存溶液的配置…………………………………………………………7
 2.2.3 配合物的吸收光譜………………………………………………………7
 2.2.4 配合物組成的確定………………………………………………………7
 2.2.5甘氨酸和Cu（Ⅱ）配位反應(yīng)級數(shù)的確定 ………………………………8
 2.2.6 溫度、離子強度及pH值對甘氨酸與Cu（Ⅱ）配位反應(yīng)影響…………8
3  結(jié)果與結(jié)論 ………………………………………………………………………8
 3.1配合物的吸收光譜 ……………………………………………………………8
 3.2 配合物的組成………………………………………………………………10
 3.3甘氨酸與Cu（Ⅱ）配位反應(yīng)的級數(shù) ………………………………………12
 3.4 溫度對甘氨酸與Cu（Ⅱ）配位反應(yīng)的影響………………………………14
 3.5 離子強度對甘氨酸與Cu（Ⅱ）配位反應(yīng)的影響…………………………16
 3.6 溶劑pH值對甘氨酸與Cu（Ⅱ）配位反應(yīng)的影響…………………………17
 3.7 討論…………………………………………………………………………19
4．總結(jié)與展望………………………………………………………………………20
致謝…………………………………………………………………………………22
參考文獻……………………………………………………………………………23

摘 要：用紫外-可見光譜法研究甘氨酸與Cu（Ⅱ）的配位反應(yīng)。考察了溫度、離子強度、組成比及pH值等對配位反應(yīng)的影響。結(jié)果表明：當離子強度為I=0.1M、甘氨酸與Cu（Ⅱ）組成比（Gly／Cu）為2：1、pH=7.0時反應(yīng)的速率常數(shù)最大，而溫度對配位反應(yīng)的影響表現(xiàn)不是很突出。甘氨酸與Cu（Ⅱ）的配位反應(yīng)為二級反應(yīng)，反應(yīng)活化能為7.009KJ/mol，自由能△G≠為4.321KJ/mol。本文提出了甘氨酸與Cu（Ⅱ）配位反應(yīng)的合理機理，為高純甘氨酸銅的制備提供理論依據(jù)。

關(guān)鍵詞：甘氨酸銅；紫外可見光譜法；配位反應(yīng)；動力學

Abstract: the complexation between glycine and Cu(Ⅱ) was studied by UV - Vis spectroscopy .The influences of complexation, such as temperature, ionic strength, coordination and pH value were observed. The result shows that: the ionic strength I = 0.1M;the complex rate of glycine and Cu(Ⅱ) (Gly / Cu) is 2:1; pH =7; The rate constant of the complexation was the largest separately, and the temperature will not affect the rate constant obviously. The complexation between glycine and Cu(Ⅱ) was second-order reaction, Activation energy was 7.009KJ/mol ,and free energy △G≠ was 4.321KJ/mol. The possible reaction mechanism for the complexation between glycine and Cu(Ⅱ) was proposed. The theoretical basis was provided for the preparation of high purity copper glycine.

Key words：copper glycine；   UV-Vis spectroscopy ；  complexation ; 
 kinetics