Abstract
Large single crystals of 5,5′-distyryl-2,2′-bithiophene (DS-2T) were grown from tetrahydrofurane (THF) solution, and the crystal structure was analyzed by x-ray diffractometry. In-situ observation of crystal growth in solution was performed, and a unique change in the crystal habit depending on growth conditions is found. The change in crystal habit from a truncated parallelogram shape to a slender hexagonal shape with re-entrant angles at the both side can be explained as the consequence of kinetic roughing and Berg effect.
Acknowledgments
This work was financially supported in part by Japan Science and Technology Agency.