J 2012

Potentiometric and Voltammetric Study of 6-Benzylaminopurine and Its Derivatives

PILAŘOVÁ, Iveta, Přemysl LUBAL and Libuše TRNKOVÁ

Basic information

Original name

Potentiometric and Voltammetric Study of 6-Benzylaminopurine and Its Derivatives

Authors

PILAŘOVÁ, Iveta (203 Czech Republic, belonging to the institution), Přemysl LUBAL (203 Czech Republic, belonging to the institution) and Libuše TRNKOVÁ (203 Czech Republic, guarantor, belonging to the institution)

Edition

Electroanalysis, 2012, 1040-0397

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10403 Physical chemistry

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 2.817

RIV identification code

RIV/00216224:14310/12:00059370

Organization unit

Faculty of Science

DOI

UT WoS

000299738900021

Keywords in English

Benzylaminopurines;EVLS;potentiometry;voltammetry;enthalpy;entropy;protonation constant

Tags

Tags

International impact, Reviewed
Změněno: 25/3/2013 16:39, prof. RNDr. Přemysl Lubal, Ph.D.

Abstract

V originále

The protonation-deprotonation equilibrium of 6–benzylaminopurine (6–BAP) and its derivatives was studied by potentiometry and voltammetry. The effect of Cl or OCH3 group position in 2', 3' and 4' of the benzene ring of 6–BAP on both pKa values was investigated. To determine the enthalpy and entropy, the temperature dependence of pKa was employed. It was found that with increasing temperature the pKa decreased. In comparison with 6–BAP the chloro- or methoxy- group on the benzene ring resulted in pKa increase, and in the case of both derivatives the pKa values decreased with increasing distance of the chloro- or methoxy- moiety from the aminopurine structure. The first pKa values were also determined by linear sweep voltammetry (LSV) and elimination voltammetry with linear scan (EVLS). New approaches were shown not only for the determination of pKa from voltammetric titration curves but also for the evaluation of the reduction processes of benzylaminopurines.

Links

LC06035, research and development project
Name: Centrum biofyzikální chemie, bioelektrochemie a bioanalýzy. Nové nástroje pro genomiku, proteomiku a biomedicínu.
Investor: Ministry of Education, Youth and Sports of the CR, Centre of Biophysical Chemistry, Bioelectrochemistry and Bioanalysis. New Tools for Genomics, Proteomics and Biomedicine
MSM0021622412, plan (intention)
Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)
Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)