Synthesis, characterisation and properties of platinum(II) acetylide complexes of ferrocenylfluorene: novel soluble donor-acceptor heterometallic materials

被引:96
作者
Wong, WY
Wong, WK
Raithby, PR
机构
[1] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong
[2] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1998年 / 16期
关键词
D O I
10.1039/a803168a
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Two new bis(acetylide)-functionalised ferrocenylfluorene complexes, 9-ferrocenylmethylene-2,7-bis-(trimethylsilylethynyl)fluorene 1 and -2,7-bis(ethynyl)fluorene 2, have been prepared in good yield by condensation of ferrocenecarbaldehyde with 2,7-bis(trimethylsilylethynyl)fluorene and the subsequent desilylation of 1. Treatment of trans-[PtPh(Cl)(PEt3)(2)] with half an equivalent of 2 in CH2Cl2-NHPr2i, in the presence of CuI, at room temperature, gives the dimeric platinum(II) complex trans-[Ph(Et3P)(2)-Pt-C=CRC=C-Pt(PEt3)(2)Ph] 3 (R = 9-ferrocenylmethylenefluorene-2,7-diyl) in 56% yield. Soluble polymeric trans-[{-Pt(PBu3n)(2)-C=CRC=C-}(n)] 4 has been obtained in good yield by the CuI-catalysed dehydrohalogenation of trans-[Pt(PBu3n)(2)Cl-2] with 2 (1 : 1 molar ratio) in an amine solvent. Optical measurements on the thin films indicated that there is a significant reduction in the bandgap value for polymer 4 (2.1 eV) as compared to that of trans-[{-Pt(PBu3n)(2)-C=CRC=C}(n)] 5 (R = fluorene-2,7-diyl) (2.9 eV) without the ferrocenyl moiety, featuring the importance of donor-acceptor interaction in such conjugated systems. All the new compounds have been characterised by analytical, spectroscopic and electrochemical methods, and the single-crystal structures of 2, 3 and 5 have been established.
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页码:2761 / 2766
页数:6
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