EPR and UV–vis spectroelectrochemical studies of diketopyrrolopyrroles disubstituted with alkylated thiophenes

Peripherical thioester functionalization induces J-aggregation in bithiophene-DPP films and nanoparticles

“…Both the oligomers show HOMO and LUMO energies of À5.4 and À3.5 eV respectively, with a resulting bandgap of 1.9 eV (Table S1 †). Results are in perfect agreement with the literature data available for DPP4T-CH 3 21,22,26 and with the UV-VIS characterization in different solvents (CHCl 3 , THF, toluene). In fact, from the comparison between the normalized UV-vis spectra of the two dyes in THF (black dotted line in Fig.…”

Ground and Excited States of Bis‐4‐Methoxybenzyl‐Substituted Diketopyrrolopyrroles: Spectroscopic and Electrochemical Studies

“…The spectroelectrochemistry of DPP compounds has been only scarcely explored to our knowledge. [49,50] Therefore there is a need to study this aspect of the materials and gain understanding of the electronic and absorption properties of the radical species produced by oxidation and reduction of this family of compounds. The UV-visible spectroelectrochemical data for the first oxidation and first reduction of 4MB ThDPP is shown in Figure 5.…”

The impact of replacement of nitrogen with phosphorus atom in the pyromellitic diimides on their photophysical and electrochemical properties

“…Spectroelectrochemical investigations were conducted with connected spectrometers described above equipped with OMNI or AUTOLAB PGSTAT302N+BA potentiostat. UV-Vis measurements were carried out in a thin layer spectroelectrochemical cell which has a modified cells described in the previous literature [30,31]. An ITO electrode was used as a working electrode, platinum spiral as an auxiliary electrode, and silver wire as a pseudo-reference electrode.…”