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Research on the Properties of Multiazafulleroid[60] Derivatives

Author: HuJiWei
Tutor: TangGuangShi
School: Beijing University of Chemical Technology
Course: Applied Chemistry
Keywords: The fullerene polyaza Bridge derivatives Electrochemical Film Disaster , especially quenching
CLC: O621.25
Type: Master's thesis
Year: 2006
Downloads: 95
Quote: 0
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Abstract

Fullerenes and their derivatives electron-withdrawing ability of a wide range of practical applications, such as conductors, superconductors, magnetic materials, optoelectronic and molecular electronic devices, artificial light synthesis system and so on. Means of electrochemical and fluorescence the aza bridge the laboratory synthesis of new compounds fullerene derivatives exploratory research, specifically: this thesis, cyclic voltammetry and differential pulse method research across the ring nitrogen The electrochemical behavior of the bridge with a five-membered ring of the fullerene multi-aza bridge derivatives. Found through research The the fullerene derivative electrochemical behavior and C ₆₀ cage conjugated connected on the electrical properties of the electron donor is related to: When the CV on the introduction of an electron donating group, derivatives reduction potential negative shift restore more difficult; derivatives reduction potential shifts, when the introduction of electron-withdrawing groups on the CV Joint restored more easily. Through the study also found that the first three reduction potential of the fullerene having structure B the triaza Bridge derivatives (sddy3, jjsddy2 yisddy3), compared with the structure of A (sddy2 the reduction potential jjsddy1 yisddy2) negative shift. the sddy2 and sddy3 jjsddy1 and the jjsddy2, yjsddy2 and yjsddy3, respectively isomers, but the electrochemical behavior of each pair of isomers differ. The three-dimensional structure of the derivatives of these instructions will also affect the electrochemical behavior. And, through B3LYP/6-31g ^{* method to optimize structure of sddy2 and sddy3 better interpretation of the experimental results. Further solvent, supporting electrolyte, the electrochemical behavior of the temperature on the fullerene derivative is also influential. We studied the electrochemical behavior of the fullerene the polyaza bridge derivative in pyridine, found in pyridine redox number of peaks is not in a mixed solvent of toluene and acetonitrile in a multi-, and poor reversibility. We think the fullerene derivatives polyaza Bridge and pyridine to form charge transfer complexes. Due to the formation of charge-transfer complexes lead to the fullerene polyaza bridge derivative can not be restored to a lower valence state, so the number of redox peaks are not in a mixed solvent of toluene and acetonitrile in a multi. This paper studies the electrochemical behavior of fullerene diaza Bridge derivatives film. The study not stable find eddyjy1, and eddyjy1/DDAB films can not be obtained reversible redox peaks. This paper also studied the the derivatives the fullerene polyaza bridge the fluorescence behavior. Observed at room temperature less than the the fullerene polyaza bridge derivative of fluorescence can be observed to the fluorescence of the pyridine. When fullerene multi-aza bridge derivatives dissolved in pyridine, the pyridine the original fluorescence decreased. We believe that derivatives and pyridine the fluorescent weak charge-transfer complexes, which showed the pyridine fluorescence quenching.}

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