Development of a new class of hole-transporting and emitting vinyl polymers and their application in organic electroluminescent devices was written by Mutaguchi, Daisuke;Okumoto, Kenji;Ohsedo, Yutaka;Moriwaki, Kazuyuki;Shirota, Yasuhiko. And the article was included in Organic Electronics in 2003.Recommanded Product: 162258-89-1 This article mentions the following:
A new class of hole-transporting vinyl polymers, poly{4-vinyl-4′-[bis(4′-tert-butylbiphenyl-4-yl)amino]biphenyl} (PVBAB) and poly{4-vinyl-4′-[N,N-bis(9,9-dimethylfluoren-2-yl)amino]biphenyl} (PVFAB), and a new emitting vinyl polymer, poly(2-{4-[4-vinylphenyl(4-methylphenyl)amino]phenyl}-5-dimesitylborylthiophene) (PVPhAMB-1T), were designed and synthesized. These new vinyl polymers form smooth amorphous films with high glass transition temperatures of ca. 200 °C. PVBAB and PVFAB possess electron-donating properties, and PVPhAMB-1T possesses bipolar character with both electron-donating and accepting properties, exhibiting strong fluorescence in solution and as films. Organic electroluminescent devices using PVBAB or PVFAB as a hole-transport layer and N,N’-dimethylquinacridone-doped tris(8-quinolinolato)aluminum as an emitting layer were thermally stable and exhibited very high performance. The use of PVPhAMB-1T as an emitting material also permitted the fabrication of a high-performance, green-emitting organic EL device. In the experiment, the researchers used many compounds, for example, 4-Bromo-4′-tert-butylbiphenyl (cas: 162258-89-1Recommanded Product: 162258-89-1).
4-Bromo-4′-tert-butylbiphenyl (cas: 162258-89-1) 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 carbonbromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Recommanded Product: 162258-89-1
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary