公开(公告)号：US20210238352A1

公开(公告)日：2021-08-05

申请号：US17156238

申请日：2021-01-22

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun

IPC: C08G75/02 ,  C08F212/14

Abstract: Sulfur copolymers and methods of synthesizing said sulfur copolymers are described herein. Sulfur monomers copolymerize with epoxide or vinylic moieties the epoxy-functionalized styrenic comonomers to form a crosslinked network of the sulfur copolymer. Sulfur copolymers having high sulfur content are used as raw materials in 3D printing. Chalcogenide-based copolymers can utilize selenium to provide for the optical properties. Using an inverse vulcanization method, chalcogenic sulfur copolymers are used to prepare chemically stable polymer plastic materials with tunable optical and thermochemical properties. Optical substrates, such as films, waveguides, and molded (nano-, micro-) objects and lenses, are constructed from sulfur copolymers via 3D printing and are substantially transparent in the visible and infrared spectrum.

公开(公告)号：US10894863B2

公开(公告)日：2021-01-19

申请号：US15829248

申请日：2017-12-01

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Nicholas George Pavlopoulos

IPC: C01G39/06 ,  C08G75/16 ,  H01M4/60 ,  H01M10/052 ,  C01B17/96 ,  C08L81/04 ,  C08J3/28 ,  A61K31/795 ,  A01N59/02 ,  A01N41/12 ,  C01B3/04 ,  H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/62 ,  C08G75/14

Abstract: Compositions and methods of producing composite materials for use as a cathode in electrochemical cells. Elemental sulfur is mixed with tungsten sulfide (WS2) to form a composite mixture. Organic comonomers may be added to the composite mixture. The composite mixture is reacted to form the composite material. Electrochemical cells with cathodes containing the composite material demonstrated improved battery performance.

公开(公告)号：US11846032B2

公开(公告)日：2023-12-19

申请号：US16771597

申请日：2018-12-11

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dennis Lichtenberger ,  Richard S. Glass ,  Dong-Chul Pyun ,  William Brezinski ,  Kayla Clary ,  Metin Karayilan

IPC: C25B1/04 ,  C25B9/17

CPC classification number: C25B1/04 ,  C25B9/17 ,  Y02E60/36

Abstract: Catalyst systems employing inexpensive and readily-available protic co-catalysts to increase a proton reduction rate in a hydrogen evolution reaction (HER) are described herein. The protic co-catalysts function to increase the rate without being consumed in the process of water splitting to hydrogen and oxygen. They may simultaneously serve to stabilize the pH of the water and be the electrolyte to carry the current for the electrolytic splitting of water. The protic co-catalysts also decrease the overpotential energy requirement for the process of water splitting. These protic co-catalysts can be used with both heterogeneous and homogenous catalysts, as well as assist photocatalysis and other processes for the reduction of protons.

公开(公告)号：US20230272130A1

公开(公告)日：2023-08-31

申请号：US18143562

申请日：2023-05-04

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Robert A. Norwood ,  Roland Himmelhuber ,  Tristan Stephen Kleine ,  Liliana Ruiz Diaz ,  Laura E. Anderson

IPC: C08F112/14 ,  C07C329/10 ,  G02B1/04

CPC classification number: C08F112/30 ,  C07C329/10 ,  G02B1/04

Abstract: The present invention provides certain polymeric materials, precursors thereof as well as the preparation and uses thereof.

公开(公告)号：US11649548B2

公开(公告)日：2023-05-16

申请号：US16466571

申请日：2017-12-11

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Richard S. Glass ,  Dennis Lichtenberger ,  William Brezinski ,  Kayla Clary ,  Metin Karayilan

IPC: C25B1/02 ,  C25B1/55 ,  C25B11/048 ,  B01J31/16 ,  H01M4/90

CPC classification number: C25B1/02 ,  C25B1/55 ,  C25B11/048 ,  B01J31/165 ,  B01J2531/842 ,  H01M4/9008

Abstract: Metallopolymers composed of polymers and catalytically active diiron-disulfide ([2Fe-2S]) complexes are described herein. [FeFe]-hydrogenase mimics have been synthesized and used to initiate polymerization of various monomers to generate metallopolymers containing active [2Fe-2S] sites which serve as catalysts for a hydrogen evolution reaction (HER). Vinylic monomers with polar groups provided water solubility relevant for large scale hydrogen production, leveraging the supramolecular architecture to improve catalysis. Metallopolymeric electrocatalysts displayed high turnover frequency and low overpotential in aqueous media as well as aerobic stability. Metallopolymeric photocatalysts incorporated P3HT ligands to serve as a photosensitizer to promote photoinduced electron transfer to the active complex.

公开(公告)号：US20200299848A1

公开(公告)日：2020-09-24

申请号：US16771597

申请日：2018-12-11

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dennis Lichtenberger ,  Richard S. Glass ,  Dong-Chul Pyun ,  William Brezinski ,  Kayla Clary ,  Metin Karayilan

IPC: C25B1/04 ,  C25B9/06

Abstract: Catalyst systems employing inexpensive and readily-available protic co-catalysts to increase a proton reduction rate in a hydrogen evolution reaction (HER) are described herein. The protic co-catalysts function to increase the rate without being consumed in the process of water splitting to hydrogen and oxygen. They may simultaneously serve to stabilize the pH of the water and be the electrolyte to carry the current for the electrolytic splitting of water. The protic co-catalysts also decrease the overpotential energy requirement for the process of water splitting. These protic co-catalysts can be used with both heterogeneous and homogenous catalysts, as well as assist photocatalysis and other processes for the reduction of protons.

公开(公告)号：US20180105649A1

公开(公告)日：2018-04-19

申请号：US15857273

申请日：2017-12-28

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Rongguang Liang

IPC: C08G75/16 ,  C08J3/28 ,  A01N59/02 ,  A61K31/795 ,  C01B3/04 ,  C01B17/96 ,  H01M4/60 ,  C08L81/04 ,  A01N41/12 ,  C08G75/14 ,  H01M4/38 ,  H01M10/052

CPC classification number: C08G75/16 ,  A01N41/12 ,  A01N59/02 ,  A61K31/795 ,  B29C64/106 ,  B29C64/124 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C01B3/042 ,  C01B17/96 ,  C08G75/14 ,  C08J3/28 ,  C08J2381/04 ,  C08L81/04 ,  C08L2201/52 ,  H01M4/382 ,  H01M4/606 ,  H01M10/052

Abstract: Sulfur copolymers having high sulfur content for use as raw materials in 3D printing. The sulfur copolymers are prepared by melting and copolymerizing one or more comonomers with cyclic selenium sulfide, elemental sulfur, elemental selenium, or a combination thereof. Optical substrates, such as films and lenses, are constructed from the sulfur copolymer via 3D printing and are substantially transparent in the visible and infrared spectrum. The optical substrates can have refractive indices of about 1.75-2.6 at a wavelength in a range of about 500 nm to about 8 μm.

公开(公告)号：US20230383421A1

公开(公告)日：2023-11-30

申请号：US18315433

申请日：2023-05-10

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dennis Lichtenberger ,  Dong-Chul Pyun ,  Richard S. Glass ,  Arthur Gibson ,  Addison Coen ,  Mary Salyards

IPC: C25B1/04 ,  C25B11/048 ,  C25B15/08 ,  C25B9/19

CPC classification number: C25B1/04 ,  C25B11/048 ,  C25B15/083 ,  C25B9/19

Abstract: Metallopolymers composed of polymers and catalytically active diiron-disulfide ([2Fe-2S]) complexes. [FeFe]-hydrogenase mimics have been synthesized and used to initiate polymerization of various monomers to generate metallopolymers containing active [2Fe-2S] sites which serve as catalysts for a hydrogen evolution reaction (HER). Vinylic monomers with polar groups provided water solubility relevant for large scale hydrogen production, leveraging the supramolecular architecture to improve catalysis. Metallopolymeric electrocatalysts displayed high turnover frequency and low overpotential in aqueous media as well as aerobic stability. Metallopolymeric photocatalysts incorporated P3HT ligands to serve as a photosensitizer to promote photoinduced electron transfer to the active complex.

公开(公告)号：US11795248B2

公开(公告)日：2023-10-24

申请号：US17156238

申请日：2021-01-22

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun

IPC: C08F212/14 ,  C08G75/02

CPC classification number: C08F212/30 ,  C08F212/22 ,  C08F212/26 ,  C08G75/02

Abstract: Sulfur copolymers and methods of synthesizing said sulfur copolymers are described herein. Sulfur monomers copolymerize with epoxide or vinylic moieties the epoxy-functionalized styrenic comonomers to form a crosslinked network of the sulfur copolymer. Sulfur copolymers having high sulfur content are used as raw materials in 3D printing. Chalcogenide-based copolymers can utilize selenium to provide for the optical properties. Using an inverse vulcanization method, chalcogenic sulfur copolymers are used to prepare chemically stable polymer plastic materials with tunable optical and thermochemical properties. Optical substrates, such as films, waveguides, and molded (nano-, micro-) objects and lenses, are constructed from sulfur copolymers via 3D printing and are substantially transparent in the visible and infrared spectrum.

公开(公告)号：US11674005B2

公开(公告)日：2023-06-13

申请号：US16622875

申请日：2018-06-14

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Dong-Chul Pyun ,  Richard S. Glass ,  Kyle Carothers ,  Yueyan Zhang

IPC: C08J3/26 ,  C08G75/0209 ,  C08G75/0222

CPC classification number: C08J3/26 ,  C08G75/0209 ,  C08G75/0222 ,  C08J2309/10

Abstract: Methods of vulcanization using a high content sulfur polymer, instead of elemental sulfur, have been developed. These high sulfur content polymers are referred to as Chalcogenide Hybrid Inorganic/Organic Polymers (CHIP) materials and have good polymer compatibility in that they are soluble in a number of polymers. Furthermore, CHIP materials may have weaker bonds than the S—S bonds of elemental sulfur and thus provide for a higher crosslinking efficiency vulcanization.