The synthesis and properties of novel π-conjugated 2,1,3-benzothiadiazole oligomers

The role of structural and electronic factors in shaping the ambipolar properties of donor–acceptor polymers of thiophene and benzothiadiazole

“…Comparing of these results with other report [53] presenting irreversible CV of a few BT units linked together in one compounds indicate that not only the LUMO level but also proper balance between donor and acceptor units as well as arrangement and rigidity of polymer structure are important factors which improve the n-doping ability and electrochemical stability of -conjugated polymers. The comparison of relative spin concentration of poly45 in p-and n doping range was also made ( Figure 12).…”

POMA/PMMA blends modified by dye: Spectroscopic and morphological properties

“…PL spectrum of the BT molecule in CHCl 3 presents a band centered at ˜ 400 nm. The red shift of this band in the new materials can be justified by the interaction of BT with the CP, causing an increase in π bonds of the dye and consequently its redshift 6…”

“…In recent years, the studies of CP grew significantly along with its promising applications in electronic devices 3–5. However, the mixtures of two or more polymers can create strategies to produce materials with specific properties of each component of the mixture 6. Great attention has been given to the investigation of these systems, aiming to develop new materials, because polymer blends are an economical means to develop new resins at low cost 7.…”

A high contrast mechanochromic luminescent diacetylene-linked bis-benzothiadiazole derivative

“…The synthesis of the dimeric compounds 4 and 5 was performed starting from 4-bromo-7-(4-nonylphenyl)benzo[c][1,2,5]thiadiazole 2 which can be readily obtained starting from commercial 4,7-dibromobenzo[c][1,2,5]thiadiazole 2 through Suzuki coupling with one equivalent of 4-nonylphenylboronic acid as has been previously reported. 22 Self-coupling reaction of 2 catalysed by Pd(OAc) 2 in polyethylene glycol (PEG4000), 29,30 rendered straightforwardly compound 4 in good yield (Scheme 1). Compound 5 was obtained by Cu-catalysed oxidative Eglinton coupling of the corresponding ethynyl derivative 3, which is readily accessed in two steps by Sonogashira coupling of 2 with ethynyl trimethylsilane, followed by deprotection with KF (Scheme 1).…”