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The platinum-poly-yne polymers poly[trans-bis(tri-n-butylphosphine) platinum-poly (4,4´- diethynylenearylene)] (arylene = biphenylene 3 and anthracene 4) were synthesized by the condensation reaction between poly(diethynylenearylene) (arylene = biphenylene 1 and anthracene 2) and trans-[(PnBu3)2PtCl2] in diisopropyl amine and dichloromethane under nitrogen atmosphere in the presence of CuI catalyst. The newly synthesized platinum containing poly-yne polymers exhibit good solubility in common organic solvents. These metal linked polymers were characterized by IR, ¹H NMR and 31P NMR spectros [ABSTRACT FROM AUTHOR]

An efficient route is developed to synthesize a series of platinum‐co‐poly(p‐phenylenebutadiynylene)s (Pt‐co‐PPBs) polymers by stoichiometric mixing of poly(p‐phenylenebutadiynylene)s (PPBs) and platinum bis‐phosphine dichlorides. This synthetic route involves two steps; first, oxidative coupling of diterminal phenyleneethynylenes (PEs) gives low‐molecular‐weight PPBs oligomers HCC(Ph(OR)2 CCCC)n Ph(OR)2 CCH (R = C4H91, R = C8H172, R = C12H253) (Mn = 1000–3000, degrees of polymerization, Pn(Mn) = 4–6), which have bifunctional alkynyl end groups, and in the second step, these organic oligomers are allowed to react with trans‐[(PnBu3)2PtCl2] to form newly designed Pt‐co‐PPBs (R = C4H94, R = C8H175, R = C12H256) polymers. The yield of 4–6 varies from good (63%) to high (76%) with high molecular weights (Mn) ranging from 52 738 to 74 212, and this methodology tolerates different alkoxy substituted PPBs. These new organometallic polymers contain platinum to phenylenebutadiynylene (PB) ratio of 1:4 to 1:6 and are solution processable. Polymer 4 displays fluorescence at room temperature and fluorescence and phosphorescence at low temperature in thin film, which would be useful for studying the triplet emission in these polymers. [ABSTRACT FROM AUTHOR]

A series of organosulfur-functionalized trans -platinum(II) bis(alkenylarylalkynyl) complexes, having one tolylthio moiety in each alkenyl backbone with general formula trans -[(PEt 3 ) 2 Pt{C C-Ar-CH CH(SC 6 H 4 CH 3 )} 2 ], ( 2a – 2d ), (where, Ar = phenylene, biphenylene, 2,5-dimethylphenylene, and 2,5-dimethoxyphenylene) were synthesized in good to excellent yields with good regioselectivity. As compared to the absorption band of trans -platinum(II) bis(alkynylarylalkynyl) complexes, we found that the position of the lowest energy absorption bands in the trans -platinum(II) bis(alkenylarylalkynyl) complexes were red-shifted, after the functionalization of the trans -platinum(II) bis(alkynylarylalkynyl) complexes with arylthiol. For all trans -platinum(II) complexes, the lowest energy absorption bands in the UV/Vis spectra, in chloroform solution, at room temperature, were observed in the range 362–394 nm, and under excitation at the wavelength of the absorption maximum exhibited the emission peak maximum at room temperature in the range 401–426 nm. The newly synthesized complexes are not exhibited phosphorescence at room temperature but are exhibited at low temperature, 77 K. All the new platinum(II) complexes have been fully characterized by spectroscopic analysis as well as elemental analysis, and the trans square-planar arrangement at the platinum centre has been confirmed by single-crystal X-ray diffraction study of complex 2a . [ABSTRACT FROM AUTHOR]