New poly(2,7‐carbazole) derivatives have been synthesized using Yamamoto or Stille coupling reaction. These polymers are highly soluble in common organic solvents and have relatively high molecular weights. Solution‐processed organic field‐effect transistors using these new polymeric semiconductors were found to exhibit a hole mobility up to 2.0 × 10−3 cm2·V−1s−1 with a current on/off ratio of 5 × 104 under ambient conditions.

The organometallic polymers ([Ag(dmb)(2)]BF(4))(n) (dmb = 1,8-diisocyano-p-menthane) and ([Pt(2)(dppm)(2)(CNC(6)Me(4)NC)](BF(4))(2))(n) (dppm = (Ph(2)P)(2)CH(2), CNC(6)Me(4)NC = 1,4-diisocyano-tetramethylbenzene) were reacted with the conjugated organic polymers of the type (-Cz-C(6)H(4)-)(n) and (-Cz-)(n), where Cz is a 2,7-linked carbazole unit substituted by (CH(2))(3)SO(3)Na or (CH(2))(4)SO(3)Na pendant groups at the N- position, to form polycation/polyanion hybrid materials. These rather insoluble and amorphous (X-ray diffraction) materials were characterized by (1)H and (13)C NMR MAS (magic angle spinning), solid-state IR, and Raman spectroscopy as well as chemical analyses. The hybrids exhibit fluorescence and phosphorescence arising from the polycarbazole units where evidence for a heavy atom effect is provided (Na < Ag < Pt) from the relative enhanced phosphorescence intensity, as well as triplet-triplet energy transfers from the ([Ag(dmb)(2)](+))(n) to the polycarbazole and from the polycarbazole to the ([Pt(2)(dppm)(2)(CNC(6)Me(4)NC)](2+))(n) unit. Evidence for energy transfer in these polymeric materials is provided from time-resolved emission spectroscopy, where the emission band associated with the ([Ag(dmb)(2)](+))(n) is found to be quenched where both the relative intensity and emission lifetime exhibit a large decrease (microsecond to nanosecond time scale).