Efficient non-doped deep-blue electroluminescence devices based on unsymmetrical and highly twisted pyrene derivatives was written by Wang, Zhiqiang;Zheng, Caijun;Fu, Weijun;Xu, Chen;Wu, Jiasheng;Ji, Baoming. And the article was included in New Journal of Chemistry in 2017.Application of 1890136-54-5 The following contents are mentioned in the article:
Two novel pyrene derivatives 1-3,5-diphenylphenyl-6-[2-(3,5-diphenylphenyl)phenyl]pyrene (PyPP) and 1-3,5-diphenylphenyl-6-[2-(9-phenyl-9H-carbazol-3-yl)phenyl]pyrene (PyPC) were successfully synthesized and characterized. Both these compounds exhibit unsym. and highly twisted structures, and show efficient deep-blue emissions and high thermal stabilities. The nondoped electroluminescence devices based on PyPP and PyPC exhibit stable and efficient deep-blue emissions with high color purity. The Commission Internationale de l’Eclairage (CIE) coordinate and maximum external quantum efficiency (EQE) of the device based on PyPP are (0.16, 0.07) and 2.99%, resp. The device based on PyPC achieved a maximum EQE of 3.72% and a CIE coordinate of (0.16, 0.09). This study involved multiple reactions and reactants, such as 2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl (cas: 1890136-54-5Application of 1890136-54-5).
2-Bromo-5′-phenyl-1,1′:3′,1”-terphenyl (cas: 1890136-54-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Application of 1890136-54-5
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary