| Summary: | 碩士 === 國立交通大學 === 應用化學系 === 90 === Two light-emitting molecules with the variation of cyano position and the corresponding polymers were synthesized, i.e., 2,5-Bis( 2-thienyl-1-cyanovinyl )-1-
( 2’-ethylhexyloxy ) -4-methoxybenzene (α-TPT ), 2,5-Bis( 2-thienyl-2-cyanovinyl )
-1-( 2’-ethylhexyloxy )-4-methoxybenzene (β-TPT ), poly[ 2,5-Bis( 2-thienyl-1-
cyanovinyl )-1- ( 2’-ethylhexyloxy )-4-methoxybenzene ] ( P1 ) and poly[2,5-Bis( 2-
thienyl-2-cyanovinyl )-1-( 2’-ethylhexyloxy )-4-methoxybenzene ] ( P2 ).
α-TPT and β-TPT, respectively, were blended into different host polymers, PMMA and PVK, to study the optical properties of the dopants in different host matrix. Althoughα-TPT and β-TPT have the same backbone structure, their optical properties are quite different with the variation of cyano position. The PL emission maximum (λmax ) of α-TPT was found blue-shifted, compared with that of β-TPT. The PL intensity of β-TPT was stronger than that of α-TPT. Concentration effect in the optical properties was found that 1 wt% of β-TPT in PVK had the maximum fluorescence emission.
The PL maximum peak wavelength for polymer films (P1 and P2 ) was red-shifted when compared with the polymer blends. The PL intensities for polymer film ( P1 and P2 ) were weaker than the polymer blends.
|
|---|
