Photoluminescent properties of poly(p-phenylene vinylene thiophene-co-siloxane)

Abstract

ABSTRACT:A new p-phenylene-vinylene-thiophene-based siloxane block copolymer has been synthesized. The copolymer consists of alternating rigid and flexible blocks. The rigid blocks are composed of phenylene-vinylene-thiophene-based units, and the flexible blocks are derived from 1,3-dialkyldisiloxane units. The former component acts as the chromophore, and allows fine tuning of band gap for blue-light emission, while the latter imparts good solubility of the copolymer in organic solvents, and thus, should enhance processibility of the resulting copolymer. The thermal properties of the copolymer have been characterized by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The photoluminescence (PL) of the copolymer in solution and in cast film has been studied. The effects of concentration on the PL intensity of the new copolymer in polymer blends with poly(methyl methacrylate) (PMMA) and poly-(vinyl carbazole) (PVK) have also been described. Efficient energy transfer from PVK to the new block copolymer in the blended film was observed.

Synthesis of Light-Emitting Conjugated Polymers for Applications in Electroluminescent Devices

“…Materials with ester, ,− amide, ,,− imide, carbonate, or urethane − linkages are usually made by the condensation of a chromophore with a linker group. Polymers with alkane, , stannane, or sil(ox)ane ,,− linking groups, however, are generally made by the Wittig, Heck, or Horner routes. For a review on the synthesis and uses of polymers with alternating organosilicon and conjugated units, see ref .…”

Synthesis and Characterization of Fluorenediylvinylene and Thiophenediylvinylene-Containing Terphenylene-Based Copolymers

“…Commercially available materials were used as received unless noted otherwise. Compounds 1 , 2 , and 9 were synthesized according to published procedures. , To form the composite, a mica type silicate modified by dimethyl dihydrogenated-tallow ammonium (C15A, Southern Clay Product Inc.) 22 was intercalated with conjugated polymer A (Scheme ). In a typical experiment, a mixture of A and C15A was dissolved in chloroform (20 mg/mL) by stirring overnight at room temperature.…”