论文总字数：16062字

摘 要

本文综述了柱[5]芳烃和对硝基苯类化合物的结构与性质，介绍了紫外可见光谱法在主客体化学研究中的应用。对硝基苯类化合物作为水中主要的污染物，由于其毒性较强，而且可以溶解于自然界的水体中，极难清除，会造成持续性的水体污染。本文根据柱[5]芳烃具有的柱状空腔结构, 和优良的分子识别性质，对与对硝基苯类化合物的包结性质进行了研究。

本文实验选用了甲氧基柱[5]芳烃作为吸附主体，包结对象选择分子尺寸与对二硝基苯相近的中性对硝基苯衍生物，通过核磁共振和紫外滴定研究甲氧基柱[5]对对硝基苯衍生物的包结行为，研究表明对硝基苯类衍生物与甲氧基柱[5]的包结比为1:1，计算得到的包结常数为Ka=1.3(±0.4)×10² L/mol，且两种方法所得到的结果是一致的。

结合对中性对硝基苯衍生物结构的研究，本课题对比了对硝基苯甲醛、对硝基苯乙酮、对硝基苯乙腈、对硝基氯苯这4种对硝基苯衍生物与甲氧基柱[5]芳烃的包结行为，分别测定了它们的包结常数，其中对硝基苯乙腈与柱[5]芳烃的包结常数明显高于其他三类。

关键词：柱[5]芳烃 对硝基苯衍生物 紫外滴定法 包结常数

Determination of complex constants between methoxy pillar[5]arene and p-nitrobenzenes byUV titration

Abstract

This article reviews the structure and properties of pillar[5]arene and p-nitrobenzenes, and introduces the application of UV-Vis spectroscopy in the study of host-guest chemistry. As the main pollutants in water, the nitrobenzene compounds have a certain degree of solubility in water. Due to its high toxicity and certain solubility in water, water pollution caused by nitrobenzene compounds will last for a long time and it is extremely difficult to remove. Therefore, according to the columnar cavity structure of the pillar[5]arene and excellent molecular recognition properties, the inclusion properties of p-nitrobenzene compounds were studied.

In this article, the methoxy pillar[5]arene was selected as the main adsorbent. neutral p-nitrobenzene derivatives with a similar molecular size as that of p-dinitrobenzene were chosen as inclusion target. inclusion performance was conducted by NMR and UV titration. inclusion between benzene derivative and methoxyl pillar[5]arene appeared, and the inclusion ratio between the p-nitrophenyl derivative to the methoxyl pillar[5]arene was determined to be 1:1. The calculated inclusion constant was Ka = 1.3 (±0.4) x 10² L/mol, and the results obtained by the two methods are consistent.

Based on the study of neutral p-nitrobenzene derivative structrues, the inclusion behavior between four paranitrobenzene derivatives such as, p-nitrobenzaldehyde, p-nitroacetophenone, p-nitrophenylacetonitrile and p-nitrochlorobenzene and methoxy pillar[5]arene were compared. Acording to their measured inclusion constant, the inclusion constant between p-nitrophenylacetonitrile and pillar[5]arene were significantly higher than those of the other three p-nitrobenzene derivatives.

Keywords: pillar[5]arene ; p-nitrobenzene derivative; ultraviolet titration ; inclusion constant

目 录

摘要 I

Abstract II

第一章 综述 (绪论) 1

1.1前言 2

1.2柱芳烃 2

1.2.1柱芳烃的结构与特性 2

1.2.2柱芳烃的合成研究 3

1.2.3柱[5]芳烃的包结性质 4

1.3对硝基苯类化合物的结构与性质 5

1.4紫外可见光谱法 6

1.5本课题研究内容及意义 7

第二章 实验部分 9

2.1概述 9

2.2实验材料与设备 10

2.3实验内容 10

第三章 实验结果与讨论 12

3.1甲氧基柱[5]对对硝基苯衍生物的包结行为 12

3.1.1包结行为的磁核共振分析 12

3.1.2包结行为的紫外滴定光谱分析 12

3.1.3包结行为的核磁共振滴定分析 14

3.2本章小结 15

第四章 结论与展望 16

4.1结论 16

4.2展望 16

参考文献 17

致谢 20

请支付后下载全文，论文总字数：16062字