No abstract

No abstract

No abstract

Optimum crystal growth conditions of thiophene/phenylene co‐oligomers (TPCOs) have been studied by means of sublimation recrystallization method with changing both gas flow rate and gas pressure. The largest flaky crystal, more than 10 mm2, was produced at the gas flow rate ∼50 ml/min and reduced pressure ∼0.05 Mpa, while no crystals were obtained at pressure less than 0.01 MPa. Excess supply of N2 gas or reduced pressure for accelerating sublimation might obstruct the crystal growth of TPCOs.