Soluble and Volatile Precursors for the Preparation of Superconducting Films

Abstract

Attempts to identify intermediates in an alkoxide-based solution route to films of the high temperature superconductor YBa2Cu3O7 reported by Fahrenholtz et al.[1] have led to the isolation of the first molecular barium-copper cluster, Ba2Cu2(OR)4(acac)4·2 HOR, R = CH2CH2OCH3. The extension of this route to the preparation of the bismuth superconductors has necessitated the investigation of bismuth alkoxide chemistry. Two separate routes to bismuth alkoxides have been examined: the metathesis of the metal halides with NaOR, (R = t-butyl, and diisopropylphenoxide) and the alcoholysis of bismuth amides, Bi(NR2)3, [R = N(SiMe3)2] The alcoholysis preparation gives high yields of several alkoxides suitable as precursors to the high Tc materials. A monomeric bismuth phenoxide, which is targeted as a volatile precursor, and a bismuth t-butoxide cluster have been isolated and stucturally characterized. Solubility and volatility studies have also been undertaken.

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References

  1. 1.

    W. G. Fahrenholtz, G. M. Millar, D. A. Payne, American Ceramic Society Symp. Proc., “Ceramic Superconductors”, May 1–5 1988.

  2. 2.

    N. N. Sauer, E. Garcia, K. V. Salazar, R. R. Ryan, J. A. Martin, J. Am. Chem. Soc., 112, 1524, (1989).

    Article  Google Scholar 

  3. 3.

    W. Clegg, N. A. Compton, R. J. Errington, N. C. Norman, N. Wishart, Polyhedron, 8, 1579, (1989).

    CAS  Article  Google Scholar 

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Correspondence to Nancy N. Sauer.

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Sauer, N.N., Garcia, E. & Ryan, R.R. Soluble and Volatile Precursors for the Preparation of Superconducting Films. MRS Online Proceedings Library 180, 921 (1990). https://doi.org/10.1557/PROC-180-921

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