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Synthesis of modular components for molecular electronics
Valášek, Michal
This work is focused on synthesis of new modular components (molecular wires, insulators, diodes, sensors and self-assembled compounds), which may find application in molecular electronics. In the first part of this work, procedure for the preparation of "molecular wires", based on the oligomers of pyridinium salts, is described. The synthetic strategy is based on a stepwise prolongation of these rodlike molecules by reaction of terminal amino group with the monofunctional units. The series of pyridinim oligomers of well-defined length have been prepared without complicated separation of complex mixtures of oligomers. The following part of work describes synthetic approach for the preparation of pyridinium oligomers ending with alkylsulfanyl or acetylsulfanyl groups. These compounds are further used to study the conductivity of conjugated oligomers, after anchoring between the gold electrodes. The following section deals with the preparation of "molecular insulators" based on a rigid bicyclo[2.2.2]octane, 1,12-dicarba-closo-dodecaborane and 1,10-dicarba-closo- decaborane units. The next part deals with the preparation of a series of five "molecular diodes", where the acceptor part (pyridinium monomer) and donor part [(η4 -tetraarylcyclobutadiene)(η5 - cyclopentadienyl) cobalt complex] are mutually separated...
Synthesis of modular components for molecular electronics
Valášek, Michal
This work is focused on synthesis of new modular components (molecular wires, insulators, diodes, sensors and self-assembled compounds), which may find application in molecular electronics. In the first part of this work, procedure for the preparation of "molecular wires", based on the oligomers of pyridinium salts, is described. The synthetic strategy is based on a stepwise prolongation of these rodlike molecules by reaction of terminal amino group with the monofunctional units. The series of pyridinim oligomers of well-defined length have been prepared without complicated separation of complex mixtures of oligomers. The following part of work describes synthetic approach for the preparation of pyridinium oligomers ending with alkylsulfanyl or acetylsulfanyl groups. These compounds are further used to study the conductivity of conjugated oligomers, after anchoring between the gold electrodes. The following section deals with the preparation of "molecular insulators" based on a rigid bicyclo[2.2.2]octane, 1,12-dicarba-closo-dodecaborane and 1,10-dicarba-closo- decaborane units. The next part deals with the preparation of a series of five "molecular diodes", where the acceptor part (pyridinium monomer) and donor part [(η4 -tetraarylcyclobutadiene)(η5 - cyclopentadienyl) cobalt complex] are mutually separated...
Synthesis of modular components for molecular electronics.
Valášek, Michal ; Všetečka, Václav (advisor) ; Štíbr, Bohumil (referee) ; Macháček, Vladimír (referee)
UNIVERZITA KARLOVA PŘÍRODOVĚDECKÁ FAKULTA KATEDRA ORGANICKÉ A JADERNÉ CHEMIE CHARLES UNIVERSITY FACULTY OF SCIENCES DEPARTMENT OF ORGANIC AND NUCLEAR CHEMISTRY Praha / Prague 2010 AUTOREFERÁT DISERTAČNÍ PRÁCE / SUMMARY OF THE PHD THESIS PŘÍPRAVA MODULÁRNÍCH PRVKŮ PRO MOLEKULOVOU ELEKTRONIKU SYNTHESIS OF MODULAR COMPONENTS FOR MOLECULAR ELECTRONICS MICHAL VALÁŠEK Supervisors: Doc. RNDr. Václav Všetečka, CSc. RNDr. Jaroslav Pecka Obsah / Table of contents 1. Úvod / Introduction.............................................................................................................2 / 3 2. Cíle disertační práce / Aims of the work...........................................................................4 / 5 3. Výsledky a diskuse / Results and discussion...................................................................6 / 11 3.1 Příprava pyridiniových oligomerů / Preparation of pyridinium oligomers.......6 / 11 3.2 Molekulové izolátory / molecular isolators............................................................7 / 12 3.3 Molekulové diody / molecular diods ......................................................................7 / 12 3.4 Molekulové senzory / molecular sensors................................................................8 / 13 3.5 Samoskladné cyklobutadienové komplexy / Self-assembled...
Monitoring of the carbon-14 in the gaseous releases from the Temelín NPP and its environmental distribution
VALÁŠEK, Michal
This work deals with monitoring of the radiocarbon in the gaseous effluents from the Temelín nuclear power plant and its distribution in the environment. The reader should gain a comprehensive image about level of radiocarbon monitoring in ventilation systems in the Temelín nuclear power plant and in the surrounding environment. The work is divided into several parts. Some basic information of physics, chemistry and radiobiology relating to radiocarbon are given in the first part. The origin of radiocarbon in VVER reactor, its pathway to gaseous releases and then to carbon cycle in the environment are described there too. This introductory part continues with description of monitoring methods used in ventilation systems of the Temelín nuclear power plant and in the surrounding environment. Summary of Czech Republic legislation related to radiation protection is stated. The aim of the work and hypothesis are set in the second part. In the third part there are methods used to fulfil the aim of the work. The results in the form of tables and graphs are in the fourth part. In the following part there is a discussion of summarized data and results. Developed findings are summarized in the last part of this work.

See also: similar author names
4 VALÁŠEK, Michal
1 Valášek, M.
1 Valášek, Marek
9 Valášek, Martin
1 Valášek, Matouš
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