摘要:苯甲醛作为世界第二大香料,在食品中被广泛应用,现今工业上化学合成苯甲醛产生的污染和安全隐患让人们开始关注天然合成苯甲醛,而氧化天然肉桂醛合成苯甲醛的绿色合成环保的方法成为人们关注的热点。本课题旨在众多条件中筛选高效能催化氧化肉桂醛合成苯甲醛的条件。本次实验使用环糊精修饰的金纳米作催化剂,天然肉桂醛作为原料进行氧化,在推测多种可能影响的条件如改变底物的种类,如碳酸氢钠,氢氧化钠或改变溶剂种类如过氧化氢,水又或者改变反应时间,最终能筛选得到一种或多种比较理想的结果。推测可能的机理,发掘潜在选择性,测定结合常熟,绘制供论文发表所需的氢谱、碳谱等,优化实验数据,改进实验结果,为后续较深入的研究工作提供理论基础。81025
毕业论文关键词:环糊精;金纳米颗粒;肉桂醛;苯甲醛
Study on Oxidation of Cinnamaldehyde by Cyclodextrin Modified Gold Nanoparticles
Abstract: Benzaldehyde as the world's second largest spices, is widely used in food, chemical industry in today's chemical synthesis of benzaldehyde pollution and safety hazards so that people began to pay attention to natural synthetic benzaldehyde, and oxidation of natural cinnamaldehyde synthesis of benzaldehyde has become a hot spot。 The purpose of this paper is to screen the conditions for high performance catalytic oxidation of cinnamaldehyde to synthesize benzaldehyde in many conditions。 In this experiment, the use of cyclodextrin-modified gold nano-catalyst, natural cinnamaldehyde as a raw material for oxidation, speculation in a variety of possible conditions such as changing the type of substrate, such as sodium bicarbonate, sodium hydroxide or change the solvent type such as Hydrogen peroxide, water or change the reaction time, and ultimately can be screened to get one or more of the more ideal results。 It is possible to optimize the experimental data and improve the experimental results, and to provide the theoretical basis for the further research work。 The results show that the possible results are discussed in this paper。
Keywords:Cyclodextrin; Gold nanoparticles; Cinnamaldehyde; Benzaldehyde
目录
1 前 言 2
1。1 选题的依据及意义 2
1。1。1 催化肉桂醛合成苯甲醛的重要意义 2
1。1。2 环糊精修饰贵金属纳米颗粒并应用于催化反应的重要价值 2
1。1。3 开题的目的 3
1。2 苯甲醛的简介 3
1。2。1 苯甲醛的作用和重要应用 3
1。2。2 苯甲醛的化学合成探索 4
2 文献综述与方案论证 4
2。1 文献综述 6
2。1。1 碳酸氢钠催化氧化肉桂醛制备天然苯甲醛 6
2。1。2 β-环糊精催化氧化肉桂醛制备苯甲醛 6
2。1。3 氢氧化钠氧化肉桂醛制备肉桂醇和肉桂酸 7
2。1。4 臭氧氧化肉桂醛为苯甲醛 7
2。1。5 Ag/C氧化肉桂醛制备肉桂酸 8
2。1。6金属卟啉催化氧化肉桂醛制备苯甲醛 8
2。2 实验方案论证 9
2。3 确定验路线 10