Patent number: 12043611
Abstract: Complexes and devices, such as organic light emitting devices and full color displays, including a compound of the formula: wherein: M is Pd2+, Ir+, Rh+, or Au3+; each of V1, V2, V3, and V4 is coordinated to M and is independently N, C, P, B, or Si; each of L1, L2, L3, and L4 is independently a substituted or unsubstituted aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, carbene, or N-heterocyclic carbene; and Z is O, S, NR, CR2, SiR2, BR, PR, ?where each R is independently substituted or unsubstituted C1-C4 alkyl or substituted or unsubstituted aryl.
Type:
Grant
Filed:
September 14, 2020
Date of Patent:
July 23, 2024
Assignee:
ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
Inventors:
Jian Li, Liang Huang, Tyler Fleetham
Patent number: 11981616
Abstract: A method for preparing 3,3?-diaminobenzidine, the method comprising the following steps: subjecting 4,4?-biphenol and N,N-dimethylsulfamoyl chloride to an esterification reaction in a specified solvent at 40-70° C. to obtain 4,4?-biphenyl bis(N,N-dimethylaminosulfonate) as a first intermediate; subjecting the 4,4?-biphenyl bis(N,N-dimethylaminosulfonate) to a chlorination reaction with a chlorinating reagent under acidic conditions to obtain 3,3?-dichloro-4,4?-biphenyl bis(N,N-dimethylaminosulfonate) as a second intermediate; subjecting the second intermediate 3,3?-dichloro-4,4?-biphenyl bis(N,N-dimethylaminosulfonate) to an ammonolysis reaction with anammoniation reagent in the presence of a combined catalyst to obtain a crude product of 3,3?,4,4?-tetraaminobiphenyl, wherein the combined catalyst is a mixture of proline, a cuprous salt and a phase transfer catalyst; and subjecting the crude product of 3,3?,4,4?-tetraaminobiphenyl to a post-treatment to obtain a purified 3,3?,4,4?-tetraaminobiphenyl product.
Type:
Grant
Filed:
January 12, 2022
Date of Patent:
May 14, 2024
Assignees:
Hubei Huida High-Tech Co., Ltd, Borun High-Tech Co., Ltd.
Inventors:
Yun Ling, Yongfang Li, Kun Wang, Lizhu Chen, Wei Yin, Jinying Zhang