Patents by Inventor Chi-Ming Che

Chi-Ming Che has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6998271
    Abstract: A luminescent sensory material for the detection of the presence of organo-halogen compounds is described. This material is based on a platinum chromophore functionalized with pyridylacetylide ligands, as shown in Formulae I and II below. These complexes exhibit positive luminescence upon exposure to the vapors of organ-halogen compounds like CH2Cl2 or CHCl3 with high selectivity over non-chlorinated common organic vapors. Direct relationships between vapor concentration and luminescence intensity are established using thin films prepared from these complexes.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: February 14, 2006
    Assignees: The Hong Kong Polytechnic University, The University of Hong Kong
    Inventors: Kwok-Yin Wong, Chi-Ming Che, Wei Lu, Zhike He
  • Publication number: 20050244672
    Abstract: Disclosed are electrophosphorescent organic metal complexes with formula (I), (H), (III) or (IV), of either geometrical isomers, comprising two bidentate NN-type ligands, or two NO-type ligands, or a tetradentate NNNN-type ligand or a tetradentate NOON-type ligand, and a transition metal. These electrophosphorescent materials are valuable to the application in organic light-emitting devices (OLEDs), including red-, orange-, or yellow-light OLEDs.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 3, 2005
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • Publication number: 20050234260
    Abstract: The present invention relates to the use of nanosized metal particles (e.g., ruthenium) grafted on inert solid support for oxidation of alkenes. The supported metal catalyst can effect cis-dihydroxylation and oxidative cleavage of alkenes to give the respective cis-diols and carbonyl products.
    Type: Application
    Filed: April 19, 2005
    Publication date: October 20, 2005
    Inventors: Chi-Ming Che, Wing-Yiu Yu, Chi-Ming Ho
  • Publication number: 20050233167
    Abstract: Disclosed are emissive materials of formula (I) or (II), comprising two bidentate NO-type ligands, or a tetradentate NOON-type ligand, and a transition metal. The emissive materials are useful as electrophosphorescent emitters in organic light-emitting devices. Also disclosed are methods for preparing organic light-emitting diodes comprising these emissive materials, and the use of such diodes as white and yellow organic light-emitting devices.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 20, 2005
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • Publication number: 20050209470
    Abstract: Diastereoselective epoxidation of allylically substituted alkenes using metalloporphyrins as catalyst provides high trans-selectivities (i.e., trans-:cis-epoxide ratio). A diversity of cycloalkenes bearing different allylic substituents are shown to be efficiently epoxidized to afford the corresponding trans-epoxides with excellent trans-selectivities (up to >98%) and good yields (up to 99%). Acyclic allylic alkenes bearing different allylic substituents are efficiently epoxidized to afford the corresponding erythro-epoxides with good erythro-selectivities. The metalloporphyrin-catalyzed reactions exhibit up to 20 times higher trans-selectivities than the conventional method using m-chloroperoxybenzoic acid as oxidant.
    Type: Application
    Filed: March 16, 2005
    Publication date: September 22, 2005
    Inventors: Chi-Ming Che, Man-Kin Wong
  • Publication number: 20050153164
    Abstract: Materials containing one or more borazine rings are employed as materials for electroluminescent devices. The compounds have molecular structures represented by the following formula: in which R1—R6 are independently a metal; a whole or part of an optionally substituted borazine ring; hydrogen; halogen; hydroxyl; optionally substituted alkyl, cycloalkyl, aryl, acyl, alkoxy, acyloxy, amino, acylamino, aralkyl, cyano, carboxyl, thio, vinyl, styryl, aminocarbonyl, carbamoyl, aryloxycarbonyl, phenoxycarbonyl, or alkoxycarbonyl, as well as recognized donor and acceptor groups. The compounds have high thermal stability as well as hole and electron mobilities.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 14, 2005
    Inventors: Chi-Ming Che, Iona Sham
  • Publication number: 20040236099
    Abstract: An intramolecular amidation processes for substrates such as sulfamates using chiral and non-chiral metalloporphyrin complexes which can maximize catalytic activity, enhance efficiency, stereoselectivity and speed of amidation reactions is described. The chiral metalloporphyrin catalyzed amidation of sulfamates exhibits excellent cis-selectivity, affording cyclic sulfamidates with high enantiomeric excess values.
    Type: Application
    Filed: March 3, 2004
    Publication date: November 25, 2004
    Inventors: Chi-Ming Che, Jiang-Lin Liang
  • Publication number: 20040086744
    Abstract: Highly fluorescent metallo-supramolecules based on terpyridine-based monomers and transition metals have been obtained. These robust supramolecules provide high quantum yields with emissions from violet to blue, green or yellow color. They have emerged as promising emitters for polymeric light-emitting diodes (PLEDs) due to desirable properties such as high luminance, high purity, low cost, and good thermal stabilities.
    Type: Application
    Filed: November 6, 2002
    Publication date: May 6, 2004
    Inventors: Chi-Ming Che, Sze-Chit Yu
  • Publication number: 20040063681
    Abstract: Disclosed are pharmaceutical compositions comprising gold(III) complexes of porphyrins, Schiff-bases, bis(pyridyl)carboxamides and bis(pyridyl)sulfonamides. Also disclosed are methods for using the pharmaceutical compositions as anti-tumor and anti-HIV agents.
    Type: Application
    Filed: September 16, 2003
    Publication date: April 1, 2004
    Inventor: Chi-Ming Che
  • Publication number: 20040019204
    Abstract: The present invention relates to novel intramolecular amidation processes for substrates such as sulfamate esters using chiral and non-chiral metalloporphyrin complexes, which can maximize catalytic activity and enhance efficiency, stereoselectivity and speed of amidation of these substrates. The intramolecular amidation of sulfamate ester exhibits excellent cis-selectivity, affording cyclic sulfamidates with high ee values catalyzed by chiral metalloporphyrin.
    Type: Application
    Filed: July 23, 2002
    Publication date: January 29, 2004
    Inventors: Chi-Ming Che, Jiang-Lin Liang
  • Publication number: 20030228701
    Abstract: A luminescent sensory material for the detection of the presence of organo-halogen compounds is described. This material is based on a platinum chromophore functionalized with pyridylacetylide ligands, as shown in Formulae I and II below. These complexes exhibit positive luminescence upon exposure to the vapors of organ-halogen compounds like CH2Cl2 or CHCl3 with high selectivity over non-chlorinated common organic vapors. Direct relationships between vapor concentration and luminescence intensity are established using thin films prepared from these complexes.
    Type: Application
    Filed: June 3, 2002
    Publication date: December 11, 2003
    Inventors: Kwok-Yin Wong, Chi-Ming Che, Wei Lu, Zhike He
  • Patent number: 6653654
    Abstract: Highly luminous, thermally stable and moisture-resistant light-emitting material derived from quadridentate ONNO-type ligands and a Group 10 metal were employed as emissive dopants in organic light-emitting devices. The dopants have molecular structures represented by the formula I and II: wherein M represents Group 10 metal (including platinum) and R1-R14 are each independantly selected from the group consisting of hydrogen; halogen; alkyl; substituted alkyl; aryl; substituted aryl, with substitutents selected from the group consisting of halogen, lower alkyl and recognized donor and acceptor groups.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: November 25, 2003
    Assignee: The University of Hong Kong
    Inventor: Chi-Ming Che
  • Publication number: 20020179885
    Abstract: Disclosed herein are novel light-emitting materials of Formula I and II below. These new complexes are synthesized and found to be sufficiently stable to allow sublimation and vacuum deposition. These new emitters are electrophosphorescent and can be used in organic light-emitting devices (OLEDs) for device elements capable of emitting light of color ranging from orange to red with high-efficiency and high-brightness.
    Type: Application
    Filed: March 8, 2002
    Publication date: December 5, 2002
    Inventors: Chi-Ming Che, Wei Lu, Michael Chi-Wang Chan