期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 16, 期 17, 页码 5043-5051出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200903336
关键词
molecular memories; NMR spectroscopy; organic-inorganic hybrid composites; polyoxometalates; silicon; surface chemistry
资金
- European Community [MEST-CT-2005-020513]
Organosilyl/-germyl polyoxotungstate hybrids [PW9O34(tBuSiO)(3)Ge(CH2)(2)CO2H](3-) (1a), [PW9O34(tBuSiO)(3)Ge(CH2)(2)CONHCH2C CH](3-) (2a), [PW11O39Ge(CH2)(2)CO2H](4-) (3a), and [PW11O39Ge(CH2)(2)CONHCH2C CH](4-) (4a) have been prepared as tetrabutylammonium salts and characterized in solution by multinuclear NMR spectroscopy. The crystal structure of (NBu4)(3)1a center dot H2O has been determined and the electrochemical behavior of la and 2a has been investigated by cyclic voltammetry. Covalent grafting of 2a onto an n-type silicon wafer has been achieved and the electrochemical behavior of the grafted clusters has been investigated. This represents the first example of covalent grafting of Keggin-type clusters onto a Si surface and a step towards the realization of POM-based multilevel memory devices.
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