Novel Electroluminescent Polymers Derived from Carbazole and Benzothiadiazole

Novel Red Electroluminescent Polymers Derived from Carbazole and 3,6-Bis(2-thienyl)-1,2,7-benzothiadiazole

“…Compounds 1-4 were synthesized according to the procedures described previously. [8,9] 4,7-Bis(5-bromo-2-thienyl)-2,1,3-benzothiadiazole (7) was synthesized from 4,7-dibromo-2,1,3-benzothiadiazole [10] (4) and tributyl(2-thienyl)stannane (5), [11,12] followed by bromination with N-bromosuccinimide (NBS).…”

“…[7] Recently, we reported the synthesis and light-emitting properties of a copolymer of carbazole with benzothiadiazole as a narrow-band-gap comonomer (PCzBTDz) that emits orange light. [8] In this Communication we show that a further increase in conjugation of the guest comonomer (by attaching thiophene rings to the benzothiadiazole core at both ends) leads to efficient, saturated red-light-emitting polymers.…”

Saturated Red Light‐Emitting Copolymers of Poly(aryleneethynylene)s with Narrow‐Band‐Gap (NBG) Units: Synthesis and Luminescent Properties

“…A series of polyfluorene copolymers with NBG aromatic heterocyclic units was synthesized to realize high-efficiency saturated red emitter. [28][29][30][31][32] We have also shown that for the copolymers with fluorene as a wide-band-gap segment and with varieties of S-and Se-containing heterocycles as a guest, the energy transfer via trap-mechanism is so efficient, which can dominate interchain interaction between polyfluorene segments. As a result, both fluorene host and the associated excimer emission have been substantially quenched and the copolymers exclusively emit light responsible for low-lying NBG comonomers.…”

Electrophosphorescent Polyfluorenes Containing Osmium Complexes in the Conjugated Backbone

“…Materials: 3-Trifluoromethyl-5-(4-tert-butylpyridyl)-1,2,4-triazole (bpftz), [35] the monomers M2, [37] M3, [38] M4, [39] and M5, [50] and the blue-light-emitting polymer PF-TPA-OXD [37] were prepared according to reported procedures. The solvents were dried using standard procedures.…”