Modulation of dark conductivity over a 1 x 10-12 to 1 x 10-5 S/cm range through ancillary group modification in amorphous solids of ethyne-bridged (porphinato)zinc(II) oligomers

Modulation of dark conductivity (DC) over a 1 × 10-12 to 1 × 10-5 S/cm range through ancillary group modification in amorphous solids of ethylene-bridged (Prophinato)zinc (II) (PZn n)oligomers was analyzed. Results from atomic absorption spectroscopy show that the oligomers exhibit large intermolecular interactions in the solid state. The oligomer powder samples are amorphous with no discernible diffraction peaks while the oligomers are decomposed at 220°C. The results also show that PZnn species bearing stabilizing groups behave as insulators over the PZn1-PZn5 length scale. The substituents show augmentation of DC with increasing oligomer length, while the substituents enhance oligomeric interchain electronic coupling in the solid state.