18800-01-6Relevant academic research and scientific papers
Pyrazine-Flanked Diketopyrrolopyrrole (DPP): A New Polymer Building Block for High-Performance n-Type Organic Thermoelectrics
Yan, Xinwen,Xiong, Miao,Li, Jia-Tong,Zhang, Song,Ahmad, Zachary,Lu, Yang,Wang, Zi-Yuan,Yao, Ze-Fan,Wang, Jie-Yu,Gu, Xiaodan,Lei, Ting
, p. 20215 - 20221 (2019)
n-Doped conjugated polymers usually show low electrical conductivities and low thermoelectric power factors, limiting their applications in n-type organic thermoelectrics. Here, we report the synthesis of a new diketopyrrolopyrrole (DPP) derivative, pyrazine-flanked DPP (PzDPP), with the deepest LUMO level in all the reported DPP derivatives. Based on PzDPP, a donor-acceptor copolymer, P(PzDPP-CT2), is synthesized. The polymer displays a deep LUMO energy level and strong interchain interaction with a short π-πstacking distance of 3.38 ?. When doped with n-dopant N-DMBI, P(PzDPP-CT2) exhibits high n-type electrical conductivities of up to 8.4 S cm-1 and power factors of up to 57.3 μW m-1 K-2. These values are much higher than previously reported n-doped DPP polymers, and the power factor also ranks the highest in solution-processable n-doped conjugated polymers. These results suggest that PzDPP is a promising high-performance building block for n-type organic thermoelectrics and also highlight that, without sacrificing polymer interchain interactions, efficient n-doping can be realized in conjugated polymers with careful molecular engineering.
Directed Functionalization of Cyano-Substituted Furans and Thiophenes with TMPMgCl·LiCl
Dos Santos, Fernanda M.,Batista, Jo?o H. C.,Vessecchi, Ricardo,Clososki, Giuliano C.
supporting information, p. 2795 - 2800 (2015/12/18)
A number of novel difunctionalized furans and thiophenes has been prepared by the reaction of the cyano-substituted substrates with TMPMgCl·LiCl followed by the reaction with electrophiles. The crucial metalation step takes place under mild conditions allowing the isolation of desired derivatives in reasonable to good yields.
PYRROLE AND PYRAZOLE DERIVATIVES AS POTENTIATORS OF GLUTAMATE RECEPTORS
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Page/Page column 70-71, (2008/06/13)
The present invention relates to pyrrole and pyrazole compounds of formula (I) and their pharmaceutically acceptable salts, and further relates to their use in treating schizophrenia, cognitive deficits associated with schizophrenia, Alzheimer's disease, dementia of the Alzheimer's type, mild cognitive impairment, or depression. The compounds act as potentiators on glutamate receptors, in particular AMPA and the GluR family.
Carbopalladation of nitriles: Synthesis of 2,3-diarylindenones and polycyclic aromatic ketones by the Pd-catalyzed annulation of alkynes and bicyclic alkenes by 2-iodoarenenitriles
Pletnev, Alexandre A.,Tian, Qingping,Larock, Richard C.
, p. 9276 - 9287 (2007/10/03)
2-Iodobenzonitrile, its derivatives, and various heterocyclic analogues undergo palladium(O)-catalyzed annulation onto diarylacetylenes or bicyclic alkenes to afford 2,3-diarylindenones and polycyclic aromatic ketones in very good to excellent yields. This reaction represents one of the first examples of the addition of an organopalladium moiety to the carbon-nitrogen triple bond of a nitrile. The reaction is compatible with a number of functional groups. A reaction mechanism, as well as a model accounting for the electronic effects of substituents on the aromatic ring of the nitrile, is proposed.
