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• W1967514757 endingPage "2219" @default.
• W1967514757 startingPage "2212" @default.
• W1967514757 abstract "We have prepared a series of platinum complexes with a rodlike ligand and smectic (Sm) liquid crystals (LCs) to demonstrate polarized phosphorescence. The ligands for the Pt complexes “12F2PPyO8” [2-(4′-dodecyl-5′,6′-difluorophenyl)-5-octyloxypyridinato-N,C2′] and “12F2PPyO12” [2-(4′-dodecyl-5′,6′-difluorophenyl)-5-dodecyloxypyridinato-N,C2′] with long alkyl and alkoxy chains exhibited the Smectic A (SmA) phase, however no liquid crystallinity was evident in Pt complexes with LC ligands. The host LCs 1-(4-butyl-2,3-difluoro-phenyl)-4-(trans-4-pentylcyclohexyl)benzene (4F2PPCH5) and 2-(2,3-difluoro-4-hexylphenyl)-6-octyloxynaphthalene (6F2PNaO8) with long flexible chains showed wide SmA phase temperature ranges. Pt complex/Sm LC mixtures were oriented on rubbed polyimide substrates or by applying a magnetic field. The orientation coefficients of the magneto-oriented samples were recorded to be over 0.6 in the Sm LC temperature range. The oriented samples exhibited polarized optical emissions assigned to the monomer and excimer states, which were perpendicular to the orientation direction. This indicates that the transition dipole moment of the Pt complex is oriented from the ligand to the Pt atom. Pt complexes with rodlike ligands with long alkyl and alkoxy chains and host Sm LC with such chains are much more likely to obtain high order parameters and generate highly polarized optical emissions. In the mixtures, the polarization ratios of the monomer and excimer in the SmA phase were estimated to be approximately 2.5–2.9 and 4.6–5.4, respectively." @default.
• W1967514757 created "2016-06-24" @default.
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• W1967514757 date "2013-02-13" @default.
• W1967514757 modified "2023-09-27" @default.
• W1967514757 title "Orientation and Polarized Optical Emission Properties of Platinum(II) Complexes in Smectic Liquid Crystals" @default.
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• W1967514757 doi "https://doi.org/10.1002/ejic.201201388" @default.
• W1967514757 hasPublicationYear "2013" @default.
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