| |
[摘要]：The synthesis and the optical and electrochem. properties of thiophene end capped oligo(2,3-alkylthieno[3,4-b]pyrazine)s are presented. The optical absorption rapidly shifts to lower energies with increasing chain length, caused in almost equal amts. by a rise of the HOMO and a lowering of the LUMO levels. The optical band gap of the polymer is estd. to be 1.13 ?0.07 eV. Extrapolated redox potentials indicate that the polymer is a small band gap p-type material. |
|
