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Oksidativna polimerizacija anilina u prisustvu fenolnih kiselina

dc.creatorJanošević, Aleksandra
dc.creatorĆirić-Marjanović, Gordana
dc.date.accessioned2019-09-02T11:22:39Z
dc.date.available2019-09-02T11:22:39Z
dc.date.issued2010
dc.identifier.issn0367-598X
dc.identifier.urihttps://farfar.pharmacy.bg.ac.rs/handle/123456789/1438
dc.description.abstractAniline was oxidized with ammonium peroxydisulfate (APS) in aqueous solutions of various phenolic acids: 5-sulfosalicylic acid (SSA), 3,5-dinitrosalicylic acid (DNSA) and gallic acid (GA). Polymerizations were performed at the constant molar ratios [acid]/[aniline] = 0.5 and [APS]/ /[aniline] = 1.25. The conductivity of synthesized polyaniline (PANI) is affected by the dopant anion type and decreases in order: PANI-SSA > > PANI-DNSA > PANI-GA, the last polymer being nonconducting. This decrease is in accordance with the increase of initial pH value of the reaction mixture. The differences in molecular structure of synthesized PANI have been revealed by FTIR spectroscopy. FTIR spectra of PANI-SSA and PANI-DNSA show typical features of PANI conductive emeraldine salt segments. On the contrary, FTIR spectrum of PANI-GA shows absence of bands typical for conducting PANI polaronic lattice, and indicates the higher oxidation state of this polymer than that of emeraldine, the presence of substituted phenazines as constitutional units, as well as significant content of monosubstituted benzene rings which reflects low polymerization degree and/or pronounced chain branching. The strong hydrogen bonding between GA and PANI can obstruct propagation of oligoanilines and formation of longer conducting PANI chains.en
dc.description.abstractPolianilin (PANI) sintetisan je oksidacijom anilina u vodenim rastvorima fenolnih kiselina: 5-sulfosalicilne (SSA), 3,5-dinitrosalicilne (DNSA) i galne kiseline (GA), koristeći amonijum-peroksidisulfat (APS) kao oksidaciono sredstvo. Sinteze su urađene pri konstantnim polaznim molskim odnosima kiselina/anilin i APS/anilin. Utvrđeno je da sa porastom jačine fenolne kiseline raste električna provodljivost dobijenih polianilina. PANI-GA je neprovodan, PANI-DNSA pokazuje provodljivost ~10-3 S cm-1, dok je provodljivost PANI-SSA ~10-1 S cm-1. Na osnovu uporedne analize FTIR spektara protonovanih i deprotonovanih formi ovih polimera diskutovane su razlike u njihovoj molekulskoj strukturi.sr
dc.publisherSavez hemijskih inženjera, Beograd
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/142047/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceHemijska industrija
dc.subjectpolyanilineen
dc.subjectphenolic acidsen
dc.subjectelectroconductivityen
dc.subjectFTIR spectroscopyen
dc.subjectpolianilinsr
dc.subjectfenolne kiselinesr
dc.subjectelektroprovodljivostsr
dc.subjectFTIR spektroskopijasr
dc.titleOxidation of aniline in the presence of phenolic acidsen
dc.titleOksidativna polimerizacija anilina u prisustvu fenolnih kiselinasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dcterms.abstractЋирић-Марјановић, Гордана; Јаношевић, Aлександра; Оксидативна полимеризација анилина у присуству фенолних киселина; Оксидативна полимеризација анилина у присуству фенолних киселина;
dc.citation.volume64
dc.citation.issue3
dc.citation.spage215
dc.citation.epage220
dc.citation.other64(3): 215-220
dc.citation.rankM23
dc.identifier.wos000280041500009
dc.identifier.doi10.2298/HEMIND091221031J
dc.identifier.scopus2-s2.0-77954666918
dc.identifier.fulltexthttps://farfar.pharmacy.bg.ac.rs//bitstream/id/336/1436.pdf
dc.type.versionpublishedVersion


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