alpha,beta-Unsubstituted meso-positioning thienyl BODIPY: a promising electron deficient building block for the development of near infrared (NIR) p-type donor-acceptor (D-A) conjugated polymers - Squeo, BM; Gregoriou, VG; Han, Y; Palma-Cando, A; Allard, S; Serpetzoglou, E; Konidakis, I; Stratakis, E; Avgeropoulos, A; Anthopoulos, TD; Heeney, M; Scherf, U; et al. (JOURNAL OF MATERIALS CHEMISTRY C, 2018)