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    4.
    发明专利
    未知

    公开(公告)号：MX167372B

    公开(公告)日：1993-03-19

    申请号：MX1054288

    申请日：1988-02-24

    Applicant: IBM

    Inventor： LIM GRACE S ,  PARKIN STUART S P ,  BEYERS ROBERT B ,  ENGLER EDWARD M ,  GRANT PAUL M

    IPC: C01G1/00 ,  C01G3/00 ,  C04B35/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  H03B15/00

    Abstract: Compositions having the formula A1+/-xM2+/-xCu3Oy, wherein A is Y, or a combination of Y La, Lu, Sc or Yb; M is Ba, or a combination of Ba, Sr or Ca and y is sufficient to satisfy the valence demands, have been found to be bulk electrical superconductors at a temperature above 77K. The compositions are single phase perovskite-like crystalline structures. They are made by a process involving intimately mixing the metal oxides or their precursors in the proper molar ratios, heating the mixture in the presence of oxygen to a temperature between about 800 DEG C and about 1100 DEG C and slowly cooling the mixture to room temperature in the presence of oxygen over a period of at least four hours.

    COUPLING OF MOLECULAR UNITS BY DESELENIZATION OF SELENOCARBONYL OUNDS
    9.
    发明专利
    COUPLING OF MOLECULAR UNITS BY DESELENIZATION OF SELENOCARBONYL OUNDS 未知

    公开(公告)号：CA1058624A

    公开(公告)日：1979-07-17

    申请号：CA223170

    申请日：1975-03-21

    Applicant: IBM

    Inventor： ENGLER EDWARD M ,  PATEL VISHNUBHAI V

    IPC: C07D339/06 ,  C07D343/00 ,  C07D345/00 ,  H01B1/12 ,  C07D421/04

    Abstract: of the Invention Organic molecules can be coupled via their selenocarbonyl derivatives. Generally, the synthesis can be described by the following reaction equation: where can be a cyclic or heterocyclic organic compound and R can be alkoxy, phenoxy or phenyl, preferably CH3O, C2H5O, C6H5O, C6H5 and the like. The reaction is usually carried out in a refluxing solvent, the choice of the solvent being determined by the stability and by the ease of coupling of a particular substrate. Groups that tend to stabilize the selenocarbonyl require higher boiling solvents and longer refluxing times. Aromatic solvents, such as benzene or toluene are well-suited for the coupling reaction. In some cases, refluxing the substrate in the alkoxy-phosphorus base as solvent may be advantageous. This new coupling procedure permits the synthesis of the hitherto unknown compounds: tetraselenofulvalene (TScF), the selenium analogue of tetrathiofulvalene (TTF), and disolenodithiofulvalene (DSeDTF). Highly conducting char?e transfer salts of tetraselenofulvalere and diselenodithiofulvalene with totracyano-p-quinodimethane have also been prepared. The materials of this invention are useful in the organic electronic devices described the United States Patent No. 3,953,874, issued April 27, 1970, to Arieh Aviram et al. and assigned to the same assignee as is the present application.

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