W. Wong, Li Liu, Suk‐Yue Poon
May 21, 2004
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0
Influential Citations
61
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Journal
Macromolecules
Abstract
Soluble and thermally stable group 10 platinum(II) and group 12 mercury(II) polyyne polymers containing the diphenylfluorene moiety trans-[−Pt(PBu3)2C⋮CRC⋮C−]n and [−HgC⋮CRC⋮C−]n (R = 9,9-diphenylfluorene) were prepared in good yields by polycondensation polymerization of trans-[PtCl2(PBu3)2] or HgCl2 with 9,9-bis(4-ethynylphenyl)fluorene. We report the optical absorption and photoluminescence spectra of these carbon-rich metal-based polymers and compare the results with their monomeric model complexes trans-[Pt(Ph)(PEt3)2C⋮CRC⋮CPt(Ph)(PEt3)2] and [MeHgC⋮CRC⋮CHgMe] as well as the group 11 gold(I) congener [(PPh3)AuC⋮CRC⋮CAu(PPh3)]. The regiochemical structures of the polymers were studied by NMR spectroscopy and by single-crystal X-ray analysis for the model platinum(II) compound. Our investigations indicate that harvesting of the organic triplet emissions can be achieved by the heavy-atom effect of group 10−12 transition metals (i.e., Pt, Au, Hg) which enables a very high efficiency of intersystem crossi...