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• W2046114737 abstract "The new conjugated organometallic polymer (−spacer−C≡C−Pt(PBu3)2−C≡C−)n (3; spacer = para-bis(diphenyl(tetramethyl)quinone diimine) and the cyclic mononuclear model complex, spacer′−C≡C−Pt(PEt3)2−C≡C·CuCl (4; spacer′ = ortho-diphenyl-2,3,5,6-tetramethyl-1,4-benzoquinone diimine) were synthesized from the 1:1 condensation of the corresponding diethynyl ligands (2-para and 2-ortho (para- and ortho-diethynyl-diphenyl-2,3,5,6-tetramethylquinone diimine), respectively), with the trans-Pt(PBu3)2Cl2 for polymer 3 and cis-Pt(PEt3)2Cl2 for 4. The materials were characterized by GPC, DSC, ATG, and electrochemistry for polymer 3, and by X-ray diffraction for 4. Polymer 3 exhibits a Mn of 18500, Mw of 25000 with a PD of 1.37. The trans-geometry about Pt in polymer 3 was confirmed by31 P NMR and IR/Raman spectroscopy. The cyclic voltammogram study on the model complex trans-Pt(PBu3)2(C≡CPh)2, spacer 1-para (Me3Si−C≡C−R−C≡C−SiMe3; R = para-diphenyl-2,3,5,6-tetramethyl-1,4-benzoquinone diimine) and polymer 3 demonstrated that polymer 3 in the presence of trifluoroacetic acid (TFA) exhibits a quasi reversible 2-electron reduction process centered at 0.48 V versus SCE corresponding to the reduction of the protonated quinone diimine unit into the corresponding diamine. The UV−vis spectra of the spacer 2-para (440 nm) and polymer 3 (502 nm) are characterized by red-shifted charge transfer (CT) absorptions (C6H4C≡C → quinone diimine for 2-para; and (C6H4C≡C)2Pt → quinone diimine for polymer 3). These assignments are corroborated by density-functional theory (DFT) and time-dependent density-functional theory (TDDFT) computations. Polymer 3 is not luminescent in the solid state or in solution at 77 K and 298 K." @default.
• W2046114737 created "2016-06-24" @default.
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• W2046114737 date "2008-11-25" @default.
• W2046114737 modified "2023-10-17" @default.
• W2046114737 title "Conjugated Organometallic Polymer Containing a Redox-Active Center" @default.
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• W2046114737 doi "https://doi.org/10.1021/ic800857v" @default.
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