Acid-Base Equilibrium of 6-Benzylaminopurine and Its 4-Chloro and 4-Methoxy Derivatives in Water-Ethanol Solutions Studied by Voltammetry and Spectrophotometry

SERRANO, Nuria, Sylvie HOLUBOVÁ and Libuše TRNKOVÁ. Acid-Base Equilibrium of 6-Benzylaminopurine and Its 4-Chloro and 4-Methoxy Derivatives in Water-Ethanol Solutions Studied by Voltammetry and Spectrophotometry. Electroanalysis. vol. 23, No 9, p. 2217-2225. ISSN 1040-0397. doi:10.1002/elan.201100282. 2011.

Basic information

• Original name: Acid-Base Equilibrium of 6-Benzylaminopurine and Its 4-Chloro and 4-Methoxy Derivatives in Water-Ethanol Solutions Studied by Voltammetry and Spectrophotometry
• Authors: SERRANO, Nuria (724 Spain, belonging to the institution), Sylvie HOLUBOVÁ (203 Czech Republic, belonging to the institution) and Libuše TRNKOVÁ (203 Czech Republic, guarantor, belonging to the institution).
• Edition: Electroanalysis, 2011, 1040-0397.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10403 Physical chemistry
• Country of publisher: Czech Republic
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 2.872
• RIV identification code: RIV/00216224:14310/11:00053590
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1002/elan.201100282
• UT WoS: 000295143900031
• Keywords in English: Benzylaminopurines; Water-ethanol solution; Linear sweep voltammetry; Elimination voltammetry with linear scan; Spectrophotometry
• Tags: AKR, rivok, ZR

Abstract

The apparent pK(a) values of 6-benzylaminopurine (BAP) and its 4-chloro-6-benzylaminopurine and 4-methoxy-6-benzylaminopurine derivatives were determined in good agreement with voltammetric approaches and with spectrophotometry. Whereas at acidic pH values two overlapped reduction peaks on the mercury electrode were obtained, at more slightly alkaline solutions one reduction signal was measured not only for BAP but also for its derivatives. Furthermore, high scan rates, low ionic strength concentration and a high percentage of the organic solvent cause the best splitting of signals. For the detailed study of such a phenomenon, elimination voltammetry with linear scan (EVLS) was used concluding that the reasons of the peak splitting seem to be related to two different reduction mechanisms that take place on the electrode mainly controlled by adsorption.

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)

• MUNI/A/0992/2009, interní kód MU: Name: Vývoj metodologie a instrumentace analytické chemie pro studium složení a vlastností přírodních a syntetických materiálů (Acronym: MIA)

Investor: Masaryk University, Category A