Active bis-ferrocene molecules as unit for molecular computation

Zoli, Luca (2010) Active bis-ferrocene molecules as unit for molecular computation, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Scienze chimiche, 22 Ciclo. DOI 10.6092/unibo/amsdottorato/2611.
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Traditional logic gates are rapidly reaching the limits of miniaturization. Overheating of these components is no longer negligible. A new physical approach to the machine was proposed by Prof. C S. Lent “Molecular Quantum cellular automata”. Indeed the quantum-dot cellular automata (QCA) approach offers an attractive alternative to diode or transistor devices. Th units encode binary information by two polarizations without corrent flow. The units for QCA theory are called QCA cells and can be realized in several way. Molecules can act as QCA cells at room temperature. In collaboration with STMicroelectronic, the group of Electrochemistry of Prof. Paolucci and the Nananotecnology laboratory from Lecce, we synthesized and studied with many techniques surface-active chiral bis-ferrocenes, conveniently designed in order to act as prototypical units for molecular computing devices. The chemistry of ferrocene has been studied thoroughly and found the opportunity to promote substitution reaction of a ferrocenyl alcohols with various nucleophiles without the aid of Lewis acid as catalysts. The only interaction between water and the two reagents is involve in the formation of a carbocation specie which is the true reactive species. We have generalized this concept to other benzyl alcohols which generating stabilized carbocations. Carbocation describe in Mayr’s scale were fondametal for our research. Finally, we used these alcohols to alkylate in enantioselective way aldehydes via organocatalysis.

Tipologia del documento
Tesi di dottorato
Zoli, Luca
Dottorato di ricerca
Scuola di dottorato
Scienze chimiche
Settore disciplinare
Settore concorsuale
Parole chiave
QCA quantum cellular automata ferrocene substitution carbocation water H-bond alcohol alcohols pyrrole indole Friedel-Crafts nucleophile electrophile benzhydryl xanthydryl ion cation organocatalysis eanmine mayr scale "on water" aldehyde SN1 alkylation enantioselection Macmillan carbazole STM Inbr3 tropone
Data di discussione
4 Giugno 2010

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