502136-28-9Relevant academic research and scientific papers
Synthesis, structures and optical spectroscopy of photoluminescent platinum-linked poly(silylacetylenes)
Wong, Wai-Yeung,Wong, Chun-Kin,Lu, Guo-Liang,Cheah, Kok-Wai,Shi, Jian-Xin,Lin, Zhenyang
, p. 4587 - 4594 (2007/10/03)
Synthetic routes to a series of novel oligomeric and polymeric platinum(II)-containing silylacetylenes have been developed. The CuI-catalyzed reaction of trans-[Pt(PEt3)2PhCl] with the alkynylsilane Ph2Si(C≡CH)2, in a basic medium, afforded the mononuclear trans-[Ph(Et3P)2PtC≡CSiPh2C≡CH] (1) and the dinuclear trans[Ph(Et3P)2PtC≡CSiPh2C≡CPt(PEt 3)2Ph] (2). Complex 1 can be utilized as a key starting material for access to the triplatinum(II) system trans-[Ph(Et3P)2PtC≡CSiPh2C≡CPt(PBu 3)2C≡CSiPh2C≡Pt(PEt3) 2Ph] (3). Attempted oxidative coupling of 1 only led to the isolation of the triacetylenic species trans-[Ph(Et3P)2PtC≡CC≡CC≡CPt(PEt3 )2Ph] (5), involving cleavage of Si-C(alkyne) bonds. Soluble and thermally stable platinum(II) poly-yne silane polymer trans-[-Pt(PBu3)2C≡CSiPh2C≡C-] n (4) was prepared in good yield by CuI-catalyzed polymerization of trans-[Pt(PBu3)2Cl2] and Ph2Si(C≡CH)2. The single-crystal X-ray structural analyses and DFT calculations were performed on 1, 2 and 5. We report the optical absorption and photoluminescence spectra of these new metal-based oligomeric and polymeric silylacetylenes and the results are compared with platinum(II) poly-ynes with purely acetylenic and (hetero)aromatic conjugated units.
