National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Effective Scavenging of Heavy Metals by Organosulfur Moieties.
Hidasová, Denisa ; Šrogl, Jiří (advisor) ; Starý, Ivo (referee)
Specifically substituted aromatic thiols were studied for their reactivity with heavy metals. It was studied kinetics of releasing the metals from formed complexes. A synthesis of new thiolic ligands, inspired by cysteine, and corresponding metal complexes (Pb, Ab, Sb, Bi) is also presented.
Cobalt phthalocyanines as sensors for detection of htiol groups
Vaňková, Kateřina ; Nesměrák, Karel (advisor) ; Schwarzová, Karolina (referee)
Title: Cobalt phthalocyanines as sensors for determination of thiol groups Annotation: The possibility of employment of cobalt phthalocyanine as a material for the modification of HOPG electrode for construction of a sensor for quantification of thiol groups was studied. Thiol groups are occurring in various biologically active substances (sulfur amino acids). The electrochemical behavior of cobalt tetraneopentoxy-phthalocyanine (CoTNPc) in the water/organic phase system was studied, and individual peaks of cyclic voltammogram of the compound were identified. The electrodeposition of CoTNPc on HOPG electrode was found as a suitable method for construction of the sensor for quantification of thiol groups. The reproducibility of fabrication of the sensor and its time-stability was studied. The calibration dependencies for model analytes (cysteine hydrochloride and homocysteine) were measured. Key words: thiols, phthalocyanines, amperometric sensor, cyclic voltammetry
Effective Scavenging of Heavy Metals by Organosulfur Moieties.
Hidasová, Denisa ; Šrogl, Jiří (advisor) ; Starý, Ivo (referee)
Specifically substituted aromatic thiols were studied for their reactivity with heavy metals. It was studied kinetics of releasing the metals from formed complexes. A synthesis of new thiolic ligands, inspired by cysteine, and corresponding metal complexes (Pb, Ab, Sb, Bi) is also presented.
Cobalt phthalocyanines as sensors for detection of htiol groups
Vaňková, Kateřina ; Nesměrák, Karel (advisor) ; Schwarzová, Karolina (referee)
Title: Cobalt phthalocyanines as sensors for determination of thiol groups Annotation: The possibility of employment of cobalt phthalocyanine as a material for the modification of HOPG electrode for construction of a sensor for quantification of thiol groups was studied. Thiol groups are occurring in various biologically active substances (sulfur amino acids). The electrochemical behavior of cobalt tetraneopentoxy-phthalocyanine (CoTNPc) in the water/organic phase system was studied, and individual peaks of cyclic voltammogram of the compound were identified. The electrodeposition of CoTNPc on HOPG electrode was found as a suitable method for construction of the sensor for quantification of thiol groups. The reproducibility of fabrication of the sensor and its time-stability was studied. The calibration dependencies for model analytes (cysteine hydrochloride and homocysteine) were measured. Key words: thiols, phthalocyanines, amperometric sensor, cyclic voltammetry
The Use of Self-Assembled Monolayer of Thiolated Calix[4]arene on Polycrystaline Gold Electrode Surface
Hrdlička, V. ; Navrátil, Tomáš ; Šestáková, Ivana ; Barek, J. ; Ludvík, Jiří
This study deals with the use of thiolated calixarene (C[4]A) as gold electrode modifier, alone or in combination with insulating undecanthiol (C11SH), which is used to fill the gaps between calixes. Desorption potential of thiolated C[4]A and C11SH are both pH dependent, cathodic desorption peaks can be recorded in basic solutions only. The properties of the modified electrode were investigated using hydroquinone - electrochemically active molecule which fits inside the C[4]A cavity. Obtained data suggest that the electrochemical oxidation/reduction ofhydroquinone does not use C[4]A cavities as size-selective channels.

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