Patents by Inventor Mohammad A. Omary
Mohammad A. Omary 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).
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Publication number: 20210379621Abstract: The hydrophobic and corrosion resistive film of cross-linked poly(hexafluoroisopropyl methacrylate) was prepared by photopolymerization. The starting materials were a monomer of 1,1,1,3,3,3-hexafluoroisopropyl methacrylate, a photoinitiator of hydroxycyclohexyl phenyl ketone, and a cross-linker of poly(ethyleneglycol diacrylate). Photopolymerization was used to start polymerization and to cure the polymer film on an aluminum surface. Drop-casting was used to deposit the fluoropolymer onto an aluminum substrate (AA 3003). The fluoropolymer film has high corrosion protection when measured by potentiodynamic polarization and open circuit potential techniques in an aqueous solution of 3.5% NaCl. Fourier-transform infrared spectroscopy was used to monitor the polymerization process. The dynamic contact angle technique was used to measure the hydrophobicity for the fluorinated polymer coating. Thermal stability of the fluorinated polymer was measured using thermogravimetric analysis.Type: ApplicationFiled: June 9, 2021Publication date: December 9, 2021Applicant: University of North TexasInventors: Mohammad A. Omary, Teresa D. Golden, Sreekar B. Marpu, Waleed K. Yaseen
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Publication number: 20210214508Abstract: The embodiments described herein pertains to a new design method to produce copper, silver or gold based metal functional coordination polymers with excellent potential towards optoelectronic devices, gas storage and separation, optical sensors, and other applications.Type: ApplicationFiled: July 9, 2019Publication date: July 15, 2021Inventors: Manal A. Rawashdeh-Omary, Ruaa M. Almotawa, Mohammad A. Omary
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Publication number: 20200055876Abstract: A phosphorescent chemosensor based on A Gold(I) complex stabilized in an aqueous polymer media. The complex exhibits strong red emission (?max ˜690 nm) in solutions and is sensitive to sub-ppm/nM levels of silver ions. On addition of silver salt to the polymer-complex, a bright-green emissive adduct with peak maximum within 475-515 nm is developed. The silver adduct exhibits a four-fold increase in quantum yield (0.19±0.02) compared to polymer-complex alone (0.05±0.01), along with a corresponding increase in phosphorescence lifetime. The polymer-complex also exhibits sensitivity to higher concentrations (e.g., >1 mM) of other metal ions such as Tl+, Pb2+, and Gd3+. The sensing methodology is simple, fast, and convenient, and the results can be detected by the naked eye. Addition of EDTA restores the red emission of the complex. The complex can distinguish between silver ions and silver nanoparticles and can be used to remediate silver ions from the environment.Type: ApplicationFiled: August 20, 2019Publication date: February 20, 2020Applicant: University of North TexasInventors: Mohammad A. Omary, Sreekar Babu Marpu
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Patent number: 10253255Abstract: Size-tunable phosphorescent particles may be formed through self-assembly of biocompatible linear polymers, such as chitosan and other linear polymers, that bear positive surface charges, through polyelectrolytic complexation to a polyanionic metal phosphor, such as polyanionic gold(I) phosphor (AuP). The phosphorescent hydrogel nanoparticles and thin films thereof are useful for imaging, sensing of biological molecules, detection of hypoxia, and light-emitting devices. The phosphorescent hydrogel particles can be formed from a variety of linear polymers by physical cross-linking using polyelectrolytic light-emitting species, without the need for the phosphorescent complex to be entrapped in an existing microsphere or nanosphere polymer particle.Type: GrantFiled: November 30, 2016Date of Patent: April 9, 2019Assignee: UNIVERSITY OF NORTH TEXASInventors: Mohammad A. Omary, Sreekar Marpu
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Patent number: 9872916Abstract: The present invention includes photochemical method of making hybrid metal-polymer microparticles in an aqueous, biocompatible solution by providing a metal (I) composition and one or more polymeric materials; applying an electromagnetic radiation to the metal (I) composition; converting the metal (I) composition to a metal (0) composition; forming one or more hybrid metal-polymer microparticles from the metal (0); capping the one or more hybrid metal-polymer microparticles; and stabilizing the one or more hybrid metal-polymer microparticles with the one or more polymeric materials to prevent agglomeration.Type: GrantFiled: April 5, 2013Date of Patent: January 23, 2018Assignee: University of North Texas Office of Economic Development and Technology TransferInventors: Mohammad A. Omary, Sreekar Marpu
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Publication number: 20170333886Abstract: Metal-inorganic frameworks (“MIFs”) having enhanced adsorption capabilities to hydrogen, CO, CO2, hydrocarbons, and a variety of other guest molecules are disclosed. All linkers in the MIFs contain metal complexes, comprising metal atoms and inorganic or organic ligands, instead of only organic ligands as linkers in metal-organic frameworks (MOFs). Compared to their MOF counterparts, MIFs with carbon-free or carbon-deficient chemical structure are expected to possess enhanced thermal stability, higher catalytic activity, and higher gas affinity and selectivity.Type: ApplicationFiled: May 4, 2017Publication date: November 23, 2017Inventors: Mohammad A. Omary, Joshua F. Ivy
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Patent number: 9796743Abstract: Bidentate heteroleptic square planar complexes of (pyridyl)azolates possess optical and electrical properties that render them useful for a wide variety of optical and electrical devices and applications. In particular, the complexes are useful for obtaining white or monochromatic organic light-emitting diodes (“OLEDs”), including doping-free OLEDs. Preferred forms also demonstrate semiconducting behavior and may be useful in a variety of other applications. Within the general complexes of (pyridyl)azolates, the metal and the ligands may be varied to impart different optoelectronic properties.Type: GrantFiled: November 7, 2014Date of Patent: October 24, 2017Assignee: UNIVERSITY OF NORTH TEXASInventors: Mohammad A. Omary, Iain W. H. Oswald
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Publication number: 20170151350Abstract: Size-tunable phosphorescent particles may be formed through self-assembly of biocompatible linear polymers, such as chitosan and other linear polymers, that bear positive surface charges, through polyelectrolytic complexation to a polyanionic metal phosphor, such as polyanionic gold(I) phosphor (AuP). The phosphorescent hydrogel nanoparticles and thin films thereof are useful for imaging, sensing of biological molecules, detection of hypoxia, and light-emitting devices. The phosphorescent hydrogel particles can be formed from a variety of linear polymers by physical cross-linking using polyelectrolytic light-emitting species, without the need for the phosphorescent complex to be entrapped in an existing microsphere or nanosphere polymer particle.Type: ApplicationFiled: November 30, 2016Publication date: June 1, 2017Inventors: Mohammad A. Omary, Sreekar Marpu
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Publication number: 20150165056Abstract: The present invention includes photochemical method of making hybrid metal-polymer microparticles in an aqueous, biocompatible solution by providing a metal (I) composition and one or more polymeric materials; applying an electromagnetic radiation to the metal (I) composition; converting the metal (I) composition to a metal (0) composition; forming one or more hybrid metal-polymer microparticles from the metal (0); capping the or more hybrid metal-polymer microparticles; and stabilizing the one or more hybrid metal-polymer microparticles with the one or more polymeric materials to prevent agglomeration.Type: ApplicationFiled: April 5, 2013Publication date: June 18, 2015Inventors: Mohammad A. Omary, Sreekar Marpu
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Publication number: 20150155504Abstract: Bidentate heteroleptic square planar complexes of (pyridyl)azolates possess optical and electrical properties that render them useful for a wide variety of optical and electrical devices and applications. In particular, the complexes are useful for obtaining white or monochromatic organic light-emitting diodes (“OLEDs”), including doping-free OLEDs. Preferred forms also demonstrate semiconducting behavior and may be useful in a variety of other applications. Within the general complexes of (pyridyl)azolates, the metal and the ligands may be varied to impart different optoelectronic properties.Type: ApplicationFiled: November 7, 2014Publication date: June 4, 2015Inventors: Mohammad A. Omary, Iain W. H. Oswald
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Patent number: 8715395Abstract: Fluorinated metal-organic frameworks (“FMOFs”) are capable of adsorbing and desorbing hydrocarbons, namely, C6-C8 hydrocarbon oil components (n-hexane, cyclohexane, benzene and toluene). FMOFs can be arranged in a variety of configurations and have internal hollow channels and cavities. In FMOFs, hydrogen atoms have been substituted completely or partially with fluorine atoms or fluorinated groups in each linking organic ligand. These FMOFs can adsorb C6-C8 hydrocarbons, up to 500 kg/m3 as demonstrated for toluene, through a combination of superhydrophobicity and capillary action. No water adsorption was detectable even under extreme conditions including moist air near 100% relative humidity and immersion in water for multiple weeks, demonstrating far superior water resistance to BPL carbon and zeolites. These materials are stable and can be readily recycled by simple desorption many times.Type: GrantFiled: October 7, 2011Date of Patent: May 6, 2014Assignee: University of North TexasInventors: Mohammad A. Omary, Chi Yang
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Patent number: 8580397Abstract: Homoleptic square planar complexes [M(N?N)2], wherein two identical N?N bidentate anionic ligands are coordinated to the M(II) metal center, including bidentate square planar complexes of triazolates, possess optical and electrical properties that make them useful for a wide variety of optical and electrical devices and applications. In particular, the complexes are useful for obtaining white or monochromatic organic light-emitting diodes (“OLEDs”). Improved white organic light emitting diode (“WOLED”) designs have improved efficacy and/or color stability at high brightness in single- or two-emitter white or monochrome OLEDs that utilize homoleptic square planar complexes, including bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (“Pt(ptp)2”).Type: GrantFiled: July 8, 2009Date of Patent: November 12, 2013Assignee: University of North TexasInventor: Mohammad A. Omary
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Patent number: 8343260Abstract: Fluorinated metal-organic frameworks (“FMOFs”) are capable of adsorbing and desorbing gases and molecules. The FMOFs can be arranged in a variety of configurations and have internal hollow channels and cavities. In the FMOFs, hydrogen atoms have been substituted completely or partially with fluorine atoms or fluorinated groups in each linking organic ligand. The FMOFs have high densities, leading to an enhanced volumetric capacity for gas storage.Type: GrantFiled: September 12, 2008Date of Patent: January 1, 2013Assignee: University of North TexasInventors: Mohammad A. Omary, Chi Yang
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Publication number: 20120180871Abstract: The present invention describes novel “black absorbers” comprising mixed ligand metal-organic complexes to be used in OPVs. The invention describes three representative metal-organic dyes that exhibit strong absorptions spanning the entire UV/Vis portion of the solar light and, in the some cases, well within the NIR. The invention further describes the fabrication of an OPV device by co-doping P1 in a standard polymer/fullerene matrix commonly used in a bulk heterojunction device structure.Type: ApplicationFiled: October 1, 2010Publication date: July 19, 2012Applicant: UNIVERSITY OF NORTH TEXASInventor: Mohammad A. Omary
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Publication number: 20120118153Abstract: Fluorinated metal-organic frameworks (“FMOFs”) are capable of adsorbing and desorbing hydrocarbons, namely, C6-C8 hydrocarbon oil components (n-hexane, cyclohexane, benzene and toluene). FMOFs can be arranged in a variety of configurations and have internal hollow channels and cavities. In FMOFs, hydrogen atoms have been substituted completely or partially with fluorine atoms or fluorinated groups in each linking organic ligand. These FMOFs can adsorb C6-C8 hydrocarbons, up to 500 kg/m3 as demonstrated for toluene, through a combination of superhydrophobicity and capillary action. No water adsorption was detectable even under extreme conditions including moist air near 100% relative humidity and immersion in water for multiple weeks, demonstrating far superior water resistance to BPL carbon and zeolites. These materials are stable and can be readily recycled by simple desorption many times.Type: ApplicationFiled: October 7, 2011Publication date: May 17, 2012Applicant: The University of North TexasInventors: Mohammad A. Omary, Chi Yang
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Publication number: 20120065614Abstract: A new technique to stabilize transition metal phosphors in a wide variety of stimuli-sensitive polymers and gels is disclosed herein. Other than stabilization in stimuli sensitive/biocompatible matrix some of these transition metal based phosphors are also shown to act as phosphorescent crosslinkers that physically or chemically crosslink polymeric chains to form micro/nanoparticles. The microspheres/nanospheres of the present invention show decreased size and photoluminescence enhancement with particularly high sensitization at physiological pH and temperature. The so formed phosphorescent micro/nanospheres are useful for biological or environmental applications including biological labeling, imaging, and optical sensing. The techniques in the present invention enable usage of imaging agents and sensors at very low concentrations and also minimize or eliminate the usage of toxic chemical crosslinkers typically used to synthesize polymeric micro/nanoparticles.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Applicant: UNIVERSITY OF NORTH TEXASInventors: Mohammad A. Omary, Zhibing Hu, Sreekar Marpu
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Publication number: 20110260145Abstract: Homoleptic square planar complexes [M(N?N)2], wherein two identical N?N bidentate anionic ligands are coordinated to the M(II) metal center, including bidentate square planar complexes of triazolates, possess optical and electrical properties that make them useful for a wide variety of optical and electrical devices and applications. In particular, the complexes are useful for obtaining white or monochromatic organic light-emitting diodes (“OLEDs”). Improved white organic light emitting diode (“WOLED”) designs have improved efficacy and/or color stability at high brightness in single- or two-emitter white or monochrome OLEDs that utilize homoleptic square planar complexes, including bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (“Pt(ptp)2”).Type: ApplicationFiled: July 8, 2009Publication date: October 27, 2011Applicant: UNIVERSITY OF NORTH TEXASInventor: Mohammad A. Omary
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Publication number: 20100282080Abstract: Fluorinated metal-organic frameworks (“FMOFs”) are capable of adsorbing and desorbing gases and molecules. The FMOFs can be arranged in a variety of configurations and have internal hollow channels and cavities. In the FMOFs, hydrogen atoms have been substituted completely or partially with fluorine atoms or fluorinated groups in each linking organic ligand. The FMOFs have high densities, leading to an enhanced volumetric capacity for gas storage.Type: ApplicationFiled: September 12, 2008Publication date: November 11, 2010Inventors: Mohammad A. Omary, Chi Yang
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Publication number: 20100172997Abstract: The present invention includes metal nanoparticles composition and methods of making and using the same by converting a metal (I) to a metal (0) and forming one or more metal nanoparticles from the metal (0). The one or more metal nanoparticles are stabilized with one or more biocompatible stabilizers to prevent agglomeration and make them amenable for biomedical applications.Type: ApplicationFiled: December 30, 2009Publication date: July 8, 2010Applicant: UNIVERSITY OF NORTH TEXASInventors: Mohammad A. Omary, Zhibing Hu, Sreekar Marpu, Oussama Elbjeirami