【作者】 毛慧娟；

【导师】 王旭；

【作者基本信息】 吉林大学 ， 物理化学， 2012， 硕士

【摘要】 本论文主要从超分子化学中的主客体识别为出发点，研究了苏丹红I和三种氯代苯酚的光谱性质。首先，选用氧化石墨烯为主体分子，研究了其与苏丹红I的光谱性质，并以功能化的氧化石墨烯修饰的自组装金玻片为基底研究Sudan I的SERS光谱。其次，选用6-位全巯基-β-环糊精为主体分子，将其修饰在银纳米粒子表面作为SERS基底，对三种氯代苯酚（4-氯苯酚、2，6-二氯苯酚、2，4，6-三氯苯酚）进行单一组份的紫外-可见吸收光谱的分析和SERS检测。这种方法主要针对一些与SERS活性基底没有吸附作用或者与基底发生很弱吸附力的分子。由于与SERS基底发生强作用力的分子数目不多，因此这种方法的应用将越来越广泛，以后可以在各个领域进行广泛地应用。主要创新性研究成果如下：(1)基于氧化石墨烯表面富集π电子和比表面积大的特性，研究了两者之间发生超分子间的π-π堆积作用的紫外-可见吸收光谱和荧光发射光谱性质。以功能化的氧化石墨烯修饰的自组装金玻片为基底研究了Sudan I的SERS光谱，此SERS基底能对Sudan I进行定性地分析，为该SERS基底应用于有害物质的检测提供了有利的证据。(2)采用两种SERS活性基底（即自组装银玻片和银树枝），实现了对4-CP的定性分析，并讨论了酸性强弱对SERS效果的影响。(3)以6-位全巯基-β-环糊精修饰的银纳米粒子为SERS活性基底，实现了对三种氯代苯酚（4-氯苯酚、2，6-二氯苯酚、2，4，6-三氯苯酚）单一组份的定性分析和定量检测，检测限都达到10-8M；讨论了6-位全巯基-β-环糊精修饰在银纳米粒子表面的覆盖度、环糊精内腔与分子大小的匹配和分子在溶液中的状态对三种氯代苯酚SERS效果的影响，并进一步推断环糊精和三种氯代苯酚分子之间可能存在的作用机理。更多还原

【Abstract】 Sudan I has been classified as a third category carcinogen by the internationalagency for research on cancer (IARC) and so ban to add to food in most countriesincluding EU countries. But in some countries, Sudan I was found to add in food(such as pepper, egg, pizaa) because of bright color, this is a dangerous signal tohuman health. Chlorophenols have been belonged to a class of recalcitrant environ-ment pollutants and have caused directly or indirectly serious harm to human health.At present, analytical methods of Sudan I and Chlorophenols are time-consuming,high-cost and the complex of treating process, so we need a faster and more portableanalytical techniques for detection.Because of the weak interaction of SERS active substrates and the groups ofSudan I and Chlorophenols, so we studied the spectral properties of Sudan I andChlorophenols based on the SERS technology and the principles of recognition andassembly of supramolecular chemistry and finally will achieve the purpose of theSERS detection. The major contributions of this work are as follows:(1) Spectroscopy Study of Sudan I and the complex of Sudan I and GrapheneOxideWe have studied spectral properties of Sudan I by UV-vis spectra, Flouresc-ence spectra, FT-IR spectra and Raman spectra and SERS spectra of Sudan I by usingof gold colloid as substrates, but this method is only qualitative analysis notquantitative detection. Moreover, based on characteristics of Graphene Oxide(GO)that has rich π electrons on surface and large surface area, we studied spectral properties of the complex of Sudan I and GO by π-π stacking interactions, and studiedSERS spectra of Sudan I with functional GO modified by self-assembly goldnanoparticles on slide as SERS substrate. At present, this method can be qualitativeanalysis.(2) Spectroscopy Study of three kinds of ChlorophenolsWe have studied spectral properties of three kinds of Chlorophenols which are4-chlorophenol,2,6-dichlorophenol and2,4,6-trichlorophenol by UV-vis spectra,Flourescence spectra and Raman spectra. In addition, for example4-chlorophenol, weinvestigated different PH value affected the SERS spectra on two kinds of substratesthar are silver nanoparticles self-assembled on slide and sliver dendrities. But thismethod is only qualitative analysis not quantitative detection.(3) SERS Detection of three kinds of Chlorophenols with CD-SH modified bysilver nanoparticles as SERS substrateWe used a new type of SERS substrate that consists of Per-6-thio-β-cyclodextrin(CD-SH) modified by silver nanoparticles for SERS detection of a kind of molecular,be analogous to Chlorophenols with weak affinity to metallic surfaces. This method isbased on supramolecular principle of recognition and self-assembly. Moreover, wediscussed in detail the influence of SERS spectra of three kinds of Chlorophenols bysurface coverage of silver nanoparticles modified by CD-SH, matching effect of thecavity of cyclodextrin and the size of Chlorophenols and the state of Chlorophenols insolution. And from this to further, we analysed mechanism that may exist inChlorophenols with cyclodextrin inclusion complexes.更多还原