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Tuning the Magnetic Properties of Columnar Benzo[e][1,2,4]triazin-4-yls with the Molecular Shape

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cris.lastimport.scopus2024-02-12T19:39:15Z
dc.abstract.enA homologous series of disc-like 1,3,6-trisubstituted benzo[e][1,2,4]triazin-4-yls 1[n] was synthesized and their structural, thermal, optical, magnetic, and electric properties were investigated. The results demonstrate that all members of the series display a Col(h) phase with clearing temperatures depending on the length of the alkoxy chains at the N(1) position, hence the shape of the disc. Powder XRD and magnetic data indicate a gradual change in the column diameter and magnetic behavior in the series in transition from half-disc in 1[0] (antiferromagnetic interactions) to full-disc geometry in the 1[12] homologue (ferromagnetic interactions with J/k(B)=+7.5 K). Studies of binary systems revealed that a 1 : 1 mixture of 1[0] and 1[12] exhibits modest stabilization of the Col(h) phase with an expanded range, and magnetic behavior typical for 1[0] in the rigid phase obtained from the melt. Electric measurements demonstrated hole mobility of similar to 10(-3) cm(2) V-1 s(-1) and dark conductivity of similar to 10(-11) Scm(-1) in the mixture and individual compounds. The latter is enhanced up to 4 times by simultaneous illumination with UV light.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPociecha, Damian
dc.contributor.authorGardias, Anita
dc.contributor.authorKaszyński, Piotr
dc.contributor.authorMonobe, Hirosato
dc.contributor.authorSzymańska, Katarzyna
dc.contributor.authorSzczytko, Jacek
dc.contributor.authorJasiński, Marcin
dc.date.accessioned2024-01-26T11:07:46Z
dc.date.available2024-01-26T11:07:46Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number4
dc.description.volume20
dc.identifier.doi10.1002/CPHC.201800965
dc.identifier.issn1439-4235
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/123887
dc.identifier.weblinkhttps://onlinelibrary.wiley.com/doi/full/10.1002/cphc.201800965
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofChemPhysChem
dc.relation.pages636-644
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.encolumnar phase
dc.subject.enliquid crystals
dc.subject.enMagnetic properties
dc.subject.enstable radicals
dc.subject.enSynthesis
dc.titleTuning the Magnetic Properties of Columnar Benzo[e][1,2,4]triazin-4-yls with the Molecular Shape
dc.typeJournalArticle
dspace.entity.typePublication