申请人:Tao Ye
公开号:US20050137400A1
公开(公告)日:2005-06-23
There is disclosed herein phosphorescent compounds, uses thereof, and devices including organic light emitting diode (OLEDs) including such compounds.
Compounds of interest include:
wherein A is Os or Ru The anionic chelating chromophores Ncircumflex over ( )}N, which are formed by connecting one pentagonal ring structure containing at least two nitrogen atoms to a hexagonal pyridine type of fragment via a direct carbon-carbon linkage. L is a neutral donor ligand; the typical example includes carbonyl, pyridine, phosphine, arsine and isocyanide; two neutral L's can also combine to produce the so-called chelating ligand such as 2,2′-bipyridine, 1,10-phenanthroline and N-heterocyclic carbene (NHC) ligand, or bidentate phosphorous ligands such as 1,2-bis(diphenylphosphino)ethane, 1,2-bis(diphenylphosphino)benzene. L can occupy either cis or trans orientation. When L occupies the trans position, the preferred structure contains both the hexagonal fragment of NAN as well as its pentagonal fragment located at the trans position respect to their counterparts of the second NAN chromophore. When L occupies the cis position, the preferred structure consists of the pentagonal unit of Ncircumflex over ( )}N chromophores residing opposite to the L.
X
1
, X
2
and X
3
independently are C or N;
when X
2
is N, R, is omitted,
when X
3
is N, R
2
is omitted,
R
1
is H, C1-C8 alkyl, C1-C8 substituted phenyl or C1-C4 perfluoroalkyl,
R
2
is H, F or cyano substituent,
X
4
is either C or N;
X
4
may locate at any position of the hexagonal ring, when X
4
is N and R
3
and R
4
are not linked to X
4
,
R
3
is H, methyl or C1-C3 small alkyl, R
4
is H, methyl or C1-C3 small alkyl, or R
3
and
R
4
together form an additional conjugated unit with structure
本文介绍了荧光化合物及其用途,以及包括这些化合物的有机发光二极管(OLED)在内的装置。感兴趣的化合物包括:其中A是Os或Ru。阴离子螯合色团Ncircumflex over ( )}N是通过将至少含有两个氮原子的五边形环结构与一个六边形吡啶类型的片段通过直接碳-碳键连接而形成的。L是一个中性给体配体;典型的例子包括羰基、吡啶、膦、砷和异氰酸酯;两个中性的L也可以组合成所谓的螯合配体,如2,2′-联吡啶、1,10-邻菲啰啉和N-杂环卡宾(NHC)配体,或者是双齿膦配体,如1,2-双(二苯基膦基)乙烷、1,2-双(二苯基膦基)苯。L可以占据顺式或反式位向。当L占据反式位置时,首选结构包含NAN的六边形片段以及其位于反向位置的五边形片段,相对于第二个NAN色团的对应物。当L占据顺式位置时,首选结构由Ncircumflex over ( )}N色团的五边形单元组成,位于L的对面。X1、X2和X3独立地是C或N;当X2为N时,省略R;当X3为N时,省略R2;R1为H、C1-C8烷基、C1-C8取代苯基或C1-C4全氟烷基;R2为H、F或氰基取代基;X4为C或N;当X4为N且R3和R4未与X4连接时,X4可以位于六边形环的任何位置;R3为H、甲基或C1-C3小烷基;R4为H、甲基或C1-C3小烷基;或者R3和R4共同形成具有结构的额外共轭单元。