3367-54-2Relevant articles and documents
Piperazine derivative and organic photoelectric device comprising same
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Paragraph 0102-0106; 0114-0118; 0125-0129; 0136-0140; 0169, (2021/08/25)
The invention provides a piperazine derivative, an organic photoelectric device containing the same, and a piperazine derivative for improving the light-emitting utilization and-color purity of the organic light-emitting device. The organic light emitting device of the cover layer material provided by the invention can realize high light emission efficiency and color purity, and the organic light emitting element can be used for an organic EL display. A light source such as lighting, a marking plate, an identification lamp and the like. The invention provides an organic light emitting device which greatly improves the light emitting utilization rate and has excellent color purity. The present invention is characterized by the following general formula (1). Specific chemical structures and device performance are described in detail in the specification.
Nickel-catalysed selective N-arylation or N,N′-diarylation of secondary diamines
Brenner, Eric,Schneider, Rapha?l,Fort, Yves
, p. 6913 - 6924 (2007/10/03)
The selective synthesis of N-aryl or N,N′-diaryl piperazines and trimethylene(bis)piperidines from the corresponding diamines and aryl chlorides using a catalyst combination of Ni(0) associated to 2,2′-bipyridine is described. The Ni/2,2′-bipyridine catalyst is also effective for the sequential arylation of piperazine. The preparation of novel and unsymmetrical 1,4-diaryl piperazines is reported.