the interest in crystals of thiophene/phenyleneco-oligomers has recently increased. Here, we describe the strategies for the organic synthesis and crystal growth of a novel oligothiophene-based co-oligomer (thiophene/phenyl co-oligomer end-capped with pyrrole) designed to explore the effect of an electron-rich aromatic ring, such as pyrrole, to end-cap oligothiophenes. The growth by the melted material