Synthesis and Study of Electron Transport through a Self-Assembled Monolayer of Thiol-End-Functionalized Tetraphenylporphyrines and Metalo-Tetraphenylporphyrines and Electrochemical Analysis of Dopamine and Ascorbic Acid with this SAMs

Sanaei, Mahsa | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45113 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Mohammadi Boghaei, Davar
  7. Abstract:
  8. Self-Assembled Monolayer (SAM) is the first step in all surface engineering and assembly processes. It is used in sensor fabrication, memories and molecular recognition and optoelectronic devises as an active surface for patterning and chemical architecting of solid substrates. Tetraphenyl porphyrins because of their high stability and uniqe electronic and optic properties, that comes from their conjugate π electrons, easily can be used in these monolayers. Moreover they have a wide application because of their ability for coordination with metals and accepting substituents with electron donating and withdrawing properties. Electron transport through these layars which attach to the surface of different materials such as Au, Ag, Si, SiO2 and GaAs with different linkages such as thiols has been studied. Now we want to study on factors and mechanisms that influence this electron transport in some types of these layers. Some of these factors are end group linkage, substituents on tetraphenylporphyrin ring, pH, defect and holes in monolayer and packing of monolayer. Electrochemical analysis of Dopamine and Ascorbic acid have been performed. For charactrizing the monolayer synthesis and electron transport spectroscopical methods such as UV-Vis and FTIR and electrochemical methods such as CV and SWV and DPV were used
  9. Keywords:
  10. Tetraphenyl Porphyrin ; Electron Transition ; Ascorbic Acid ; Dopamine ; Electrochemical Analysis ; Self Assembled Momolayer (SAM)

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