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Thermal and Photophysical Properties of Highly Quadrupolar Liquid-Crystalline Derivatives of the [closo-B 12 H 12 ] 2− Anion

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cris.lastimport.scopus2024-02-12T19:37:38Z
dc.abstract.enTwo series of 1,12-bis-zwitterionic derivatives of the [closo-B 12 H 12 ] 2− anion (B), containing either two 4-alkoxypyridinium groups (1B[n]-p) or one 4-alkoxypyridinium and one 4-pentylthianium groups (2B[n]-p), were prepared and their structural (XRD, DFT), thermal, and photophysical properties were compared with those of the analogous derivatives of the [closo-B 10 H 10 ] 2− anion (1A[n]-p and 2A[n]-p). Some 1,7-derivatives of B were isolated and investigated. Both series 1[n] and 2[n] exhibit nematic and crystalline polymorphism; the 12-vertex derivatives (B) have higher transition temperatures than those of the 10-vertex analogues (A). All compounds fluoresce with quantum yields higher for 1B (Φ F =0.37 for 1B[7]-p and Φ F =0.27 for 2B[7]-p) than those for the 10-vertex analogues (Φ F =0.04 for 2A[5]-p). DFT calculations demonstrate an order of magnitude lower first hyperpolarizability, β (−ω,ω,0) , for 2B[7]-p than that for the 10-vertex analogue 2A[7]-p (1.7×10 −30 vs. 18.9×10 −30 esu at ω=0).
dc.affiliationUniwersytet Warszawski
dc.contributor.authorAli, Muhammad O.
dc.contributor.authorFriedli, Andrienne C.
dc.contributor.authorKaszyński, Piotr
dc.contributor.authorPecyna, Jacek
dc.contributor.authorWojciechowski, Jakub
dc.contributor.authorŻurawiński, Remigiusz
dc.contributor.authorLasseter, John C.
dc.contributor.authorPociecha, Damian
dc.contributor.authorPietrzak, Anna
dc.date.accessioned2024-01-26T09:52:02Z
dc.date.available2024-01-26T09:52:02Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number10
dc.description.volume25
dc.identifier.doi10.1002/CHEM.201805392
dc.identifier.issn0947-6539
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/121791
dc.identifier.weblinkhttps://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/chem.201805392
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofChemistry - A European Journal
dc.relation.pages2616-2630
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleThermal and Photophysical Properties of Highly Quadrupolar Liquid-Crystalline Derivatives of the [closo-B 12 H 12 ] 2− Anion
dc.typeJournalArticle
dspace.entity.typePublication