Potentiometric and Voltammetric Study of 6-Benzylaminopurine and Its Derivatives

PILAŘOVÁ, Iveta, Přemysl LUBAL and Libuše TRNKOVÁ. Potentiometric and Voltammetric Study of 6-Benzylaminopurine and Its Derivatives. Electroanalysis. 2012, vol. 24, No 2, p. 349-356. ISSN 1040-0397. Available from: https://dx.doi.org/10.1002/elan.201100491.

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

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10403 Physical chemistry
• Country of publisher: United States of America
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 2.817
• RIV identification code: RIV/00216224:14310/12:00059370
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1002/elan.201100491
• UT WoS: 000299738900021
• Keywords in English: Benzylaminopurines;EVLS;potentiometry;voltammetry;enthalpy;entropy;protonation constant
• Tags: AKR, rivok
• Tags: International impact, Reviewed

Abstract

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)