Self-assembly, molecular dynamics, and kinetics of structure formation in dipole-functionalized discotic liquid crystals

dc.contributor.authorElmahdy, M. M.en
dc.contributor.authorDou, X.en
dc.contributor.authorMondeshki, M.en
dc.contributor.authorFloudas, G.en
dc.contributor.authorButt, H. J.en
dc.contributor.authorSpiess, H. W.en
dc.contributor.authorMullen, K.en
dc.date.accessioned2015-11-24T18:35:40Z
dc.date.available2015-11-24T18:35:40Z
dc.identifier.issn0002-7863-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/17122
dc.rightsDefault Licence-
dc.subjecthexa-peri-hexabenzocoronenesen
dc.subjectglass-transitionen
dc.subjectsolid-stateen
dc.subjectdielectric-spectroscopyen
dc.subjectcolumnar hexabenzocoroneneen
dc.subjectnmr-spectroscopyen
dc.subjectphase-changeen
dc.subjecttemperatureen
dc.subjectpressureen
dc.subjectcrystallizationen
dc.titleSelf-assembly, molecular dynamics, and kinetics of structure formation in dipole-functionalized discotic liquid crystalsen
heal.abstractThe self-assembly, the molecular dynamics, and the kinetics of structure formation are studied in dipole-functionalized hexabenzocoronene (HBC) derivatives. Dipole substitution destabilizes the columnar crystalline phase except for the dimethoxy- and monoethynyl-substituted HBCs that undergo a reversible transformation to the crystalline phase. The disk dynamics are studied by dielectric spectroscopy and site-specific NMR techniques that provide both the time-scale and geometry of motion. Application of pressure results in the thermodynamic phase diagram that shows increasing stability of the crystalline phase at elevated pressures. Long-lived metastability was found during the transformation between the two phases. These results suggest new thermodynamic and kinetic pathways that favor the phase with the highest charge carrier mobility.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDoi 10.1021/Ja7113618-
heal.identifier.secondary<Go to ISI>://000254933000056-
heal.identifier.secondaryhttp://pubs.acs.org/doi/pdfplus/10.1021/ja7113618-
heal.journalNameJ Am Chem Socen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2008-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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