An efficient method for the Ullmann coupling of chloropyridines catalyzed by poly(N-vinylpyrrolidone) (PVP)-stabilized bimetallic Au–Pd alloy nanoclusters (NCs) under ambient conditions is demonstrated. The reaction does not occur with either gold or palladium single-metal clusters alone, nor with a physical mixture of the two metals. The experimental results indicate that the inclusion of Au as a nearest
Synthesis of diversely functionalized symmetrical benzidines through electrochemical dehydrogenative cross-couplingreaction of two N,N-disubstituted anilines, is described. The reactions conducted under mild conditions with no oxidizing reagents and transition metal catalysts.
ELECTROLUMINESCENT DEVICES HAVING CONJUGATED ARYLAMINE POLYMERS
申请人:Zheng Shiying
公开号:US20070278941A1
公开(公告)日:2007-12-06
An electroluminescent device, including a spaced-apart anode and cathode and an organic layer disposed between the spaced-apart anode and cathode and including a polymer having arylamine repeating unit moiety represented by formula
wherein:
Ar, Ar
1
, Ar
2
, Ar
3
, and Ar
4
are each individually arylof from 6 to 60 carbon atoms; or a heteroarylof from 4 to 60 carbons, or combinations thereof; or Ar
1
and Ar
2
, Ar
3
and Ar
4
, Ar
1
and Ar
4
, Ar
2
and Ar
4
are connected through a chemical bond; and X is a conjugated group having 2 to 60 carbon atoms.
ELECTROLUMINESCENT DEVICES HAVING PENDANT NAPHTHYLANTHRACENE-BASED POLYMERS
申请人:Zheng Shiying
公开号:US20070187673A1
公开(公告)日:2007-08-16
A naphthylanthracene-based polymer comprising a repeating unit of the formula
wherein: Ar is an aryl or substituted aryl of from 6 to 60 carbon atoms; or a heteroaryl or substituted heteroaryl of from 4 to 60 carbon atoms;
R
1
, R
2
, and R
3
are the same or different, and are each individually hydrogen, or alkyl, or alkenyl, or alkynyl, or alkoxy, or amino, or thioalkyl, or carboxyl, or carbonyl, wherein the alkyl, alkenyl, alkynyl, alkoxy, amino, thioalkyl, carboxy, or carbonyl can have from 1 to 40 carbon atoms; or aryl of from 6 to 60 carbon atoms; or heteroaryl of from 4 to 60 carbon atoms; or F, or Cl , or Br; or a cyano group; or a nitro group, or a sulfonate group; and L is a direct bond between naphthylanthracene and polymer backbone or a carbon linking group having 1 to 40 carbon atoms or a non-carbon linking group.