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Uticaj rastvarača i strukture na elektronske absorpcione spektre izomernih piridin-karboksilnih kiselina N-oksida

dc.creatorDrmanić, Saša Ž.
dc.creatorNikolić, Jasmina B.
dc.creatorMarinković, Aleksandar D.
dc.creatorŠekularac, Gavrilo
dc.creatorJovanović, Bratislav Ž.
dc.date.accessioned2019-01-30T17:33:46Z
dc.date.available2019-01-30T17:33:46Z
dc.date.issued2013
dc.identifier.issn1451-9372
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/1159
dc.description.abstractThe ultraviolet absorption spectra of the carboxyl group of three isomeric pyridine carboxylic acids N-oxides (picolinic acid N-oxide, nicotinic acid N-oxide and isonicotinic acid N-oxide) were determined in fourteen solvents in the wavelength range from 200 to 400 nm. The position of the absorption maxima (λmax) of the examined acids showed that the ultraviolet absorption maximum wavelengths of picolinic acid N-oxide are the shortest, and those of isonicotinic acid N-oxide acid are the longest. In order to analyze the solvent effect on the obtained absorption spectra, the ultraviolet absorption frequen­cies of the electronic transitions in the carboxylic group of the examined acids were correlated using a total solvatochromic equation of the form Vmax = V0 + + Sπ*+ aα+ bβ, where Vmax is the absorption frequency (1/λmax), π*is a measure of the solvent polarity, β represents the scale of solvent hydrogen bond acceptor basicities and α represents the scale of solvent hydrogen bond donor acidities. The correlation of the spectroscopic data was carried out by means of multiple linear regression analysis. The solvent effects on the ultra­violet absorption maximums of the examined acids were discussed.en
dc.description.abstractUV apsorpcioni spektri pikolinske kiseline N-oksida, nikotinske kiseline N-oksida i izonikotinske kiseline N-oksida određeni su u 14 protičnih i aprotičnih rastvarača u opsegu od 200-400 nm. Položaji maksimuma apsorpcije bili su najniži za pikolinsku kiseline N-oksid, a najviši za izonikotinsku kiseline N-oksid. Da bi se analizirao uticaj ratvarača, apsorpcione frekvence su korelisane Kamlet-Taftovom jednačinom, kojom se uticaj polarnosti/polarizabilnosti, proton-donorskog i proton-akceptorskog dejstva rastvarača može kvantitativno izraziti.sr
dc.publisherAssociation of the Chemical Engineers of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172013/RS//
dc.rightsopenAccess
dc.sourceChemical Industry and Chemical Engineering Quarterly / CICEQ
dc.subjectpicolinic acid N-oxideen
dc.subjectnicotinic acid N-oxideen
dc.subjectisonicotinic acid N-oxideen
dc.subjectultraviolet absorption maximumen
dc.subjectprotic and aprotic solventsen
dc.subjectsolvatochromic effectsen
dc.subjectpikolinska kiselina N-oksidsr
dc.subjectnikotinska kiselina N-oksidsr
dc.subjectizonikotinska kiselina N-oksidsr
dc.subjectapsorpcioni spektrisr
dc.subjectprotični i aprotični ratvaračisr
dc.subjectsolvatohromni efektisr
dc.titleThe effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxidesen
dc.titleUticaj rastvarača i strukture na elektronske absorpcione spektre izomernih piridin-karboksilnih kiselina N-oksidasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractМаринковић, Aлександар Д.; Дрманић, Саша Ж.; Николић, Јасмина Б.; Јовановић, Братислав Ж.; Шекуларац, Гаврило; Утицај растварача и структуре на електронске абсорпционе спектре изомерних пиридин-карбоксилних киселина Н-оксида; Утицај растварача и структуре на електронске абсорпционе спектре изомерних пиридин-карбоксилних киселина Н-оксида;
dc.citation.volume19
dc.citation.issue3
dc.citation.spage385
dc.citation.epage388
dc.citation.other19(3): 385-388
dc.citation.rankM23
dc.identifier.doi10.2298/CICEQ120326073D
dc.identifier.rcubConv_522
dc.identifier.fulltexthttp://cer.ihtm.bg.ac.rs//bitstream/id/7686/1157.pdf
dc.identifier.scopus2-s2.0-84884966285
dc.identifier.wos000325912800008
dc.type.versionpublishedVersion


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