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Study on Assembly of Porphyrins in the Organization Media Based on Spectroscopy

Author: GuoXiLiang
Tutor: ShuangShaoMin
School: Shanxi University
Course: Analytical Chemistry
Keywords: Porphyrin Cyclodextrin Calixarene Assembly
CLC: O626
Type: Master's thesis
Year: 2004
Downloads: 131
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Abstract


The first chapter briefly describes the porphyrin, cyclodextrin, calixarene chemical properties and structural characteristics as well as in supramolecular chemistry Research. Introduced the concept of supramolecular assembly based on brief the porphyrin assembly of biological macromolecules the cyclodextrin, DNA, and calixarene ordered medium's history and Research, and the prospect of its future development trend. This chapter cyclodextrin host molecules cooperation with the package of the porphyrin molecules, cyclodextrin and its derivatives are summarized progress of research in related fields and the porphyrin biological macromolecules, including bio-mimetic enzyme photosensitive drug for the gas molecules and the determination of metal ions, molecular recognition and supramolecular assembly. This chapter by fluorescence spectroscopy, UV-visible spectrophotometry and nuclear magnetic resonance technology meso-tetra (p - hydroxyphenyl) porphyrin (THPP) beta-cyclodextrin, hydroxypropyl-beta-cyclodextrin fine and SBE-beta-cyclodextrin the three cyclodextrin medium assembly. The results show that: the the assembly of THPP In cyclodextrin medium having selectivity. Modified good selectivity than the parent beta-cyclodextrin is beta-cyclodextrin and hydroxypropyl-beta-cyclodextrin having a hydroxyl group with on THPP strong assembly role THPP fluorescence intensity can be increased by about 300 times . By adjusting the pH of the solution was investigated at the same time the interaction of different type with a cyclodextrin with porphyrin, the results indicate that the role of the cyclodextrin easy porphyrin neutral body. This chapter IV by fluorescence spectroscopy, UV-visible spectrophotometry and nuclear magnetic resonance technology to study the meso-tetra (N-ethyl-pyridyl) porphyrin (TEPyP) beta-cyclodextrin, hydroxypropyl-beta-ring dextrin three cyclodextrin and SBE-beta-cyclodextrin medium assembly. The results show that selective: TEPyP assembled cyclodextrin medium. The Modified good selectivity than the parent beta-cyclodextrin is beta-cyclodextrin, and with the negatively charged SBE-beta-cyclodextrin having a strong role in the assembly and TEPyP, the results attributed to the positively charged porphyrin the strong electrostatic interaction with the negatively charge cyclodextrin. By adjusting the pH of the solution was investigated at the same time the interaction of different type with a cyclodextrin with porphyrin, the results indicate that the role of the cyclodextrin easy porphyrin neutral body. The fifth chapter of this chapter by fluorescence spectroscopy, UV-visible spectrophotometry and resonance light scattering techniques to study the interaction of meso-tetra (N-ethyl-pyridyl) porphyrin (TEPyP) with calf thymus DNA (ctDNA). The results showed that the two is mainly based on the electrostatic interaction between the negative charge of phosphoric acid group with a positive charge Porphyrins with DNA peripheral interaction mode by external assembly. On the basis of this study explored the impact of the presence of cyclodextrin porphyrin interaction with DNA. The results showed that in the presence of a three cyclodextrin original TEPyP with DNA binding constants and binding sites have varying degrees of reduced, i.e.: The cyclodextrin and DNA in the process and the role of porphyrin in the presence of competition. SBE-beta-cyclodextrin, which further proved that the electrostatic interaction mode Porphyrins with DNA. The sixth chapter of this chapter by fluorescence spectroscopy, UV-visible spectrophotometry study of meso-tetra (N-ethyl-pyridyl) porphyrin (TEPyP) Calix [4] amne assembly process. Calix [4] arene added, causing the porphyrin Soret absorption band redshift and accompanied by the lambda max of decreases. Fluorescence emission peak TEPyP in CalixL4] arene presence enhanced. Nonlinear the mountain chant University () 04 Shuo Bu graduate thesis least squares method to calculate the binding constant between Ye Lin Cai Yee. The results show that between l: l of the mode of action of the binding constant is 1 retaining Stone-M. Discussed in detail the impact of the PH value, it can be concluded from the effect of pH curve: the assembly of the main driving force is positively charged leaves Lin with the the CAI meeting between the negatively charged electrostatic interaction.

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Heterocyclic compounds
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