Pt complexes as phosphorescent emitters in the fabrication of organic light emitting diodes
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United States of America Patent
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Feb 21, 2006
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app pub date -
Sep 23, 2004
filing date -
Sep 23, 2004
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Abstract
A series of Pt(II) complexes having the following formula are disclosed: ##STR1## X1 and X2 independently are C or N, X1 can also locate at another position of the hexagonal ring, when X1 is N; R1 is H, C1-C8 alkyl, or C1-C4 perfluoroalkyl, R2 is H, R1 and R2 together are C4-C8 alkylene, or R1 and R2 together are bridged carbocyclic C4-C12 alkylene, when X2 is C; R1 is H, C1-C8 alkyl, or C1-C4 perfluoroalkyl, and R2 is omitted, when X2 is N; R7 is H or methyl, and R8 is omitted, when X1 is N; R7 is H or methyl, R8 is H or methyl, or R7 and R8 together are ##STR2##
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