Tetrathiafulvalene

Tetrathiafulvalene (TTF) derivatives as catholytes for dual-type redox flow batteries: molecular engineering enables high energy density and cyclability

“…S22 †). 54,77 The same redox behavior (three oxidation peaks and three reduction peaks) was observed in the solid CV test, in which the KB/TTF slurry was deposited on a carbon paper-working electrode (Fig. S23 †).…”

“…Numerous molecular engineering strategies, including tuning the redox potential and enhancing the solubility, have been reported to optimize the redoxmer properties. 53 Here, different functional groups were incorporated into the TTF core to achieve different physical and electrochemical properties: (1) four cyanoethyl chains were attached to the TTF framework to not only suppress the dimerization of pristine TTF 54 but also anodically shift the redox potential to a higher cell voltage for slurry RFBs in an aqueous electrolyte (Fig. 1A); and (2) four PEG chains were incorporated to achieve a higher solubility in an organic electrolyte and increase the molecular size for mitigated crossover (Fig.…”

Bis- and Tris-fused Tetrathiafulvalenes Extended with Anthracene-9,10-diylidene

“…Tetrathiafulvalene (TTF) and its related compounds have been the subject of considerable interest in the development of organic functional materials because of their multistage redox property with low oxidation potentials . Various TTF derivatives, extended TTF analogues, and TTF oligomers have been continuously synthesized so as to develop molecular materials with higher functionality.…”

Access to and reactions of P-functional 1,4-dihydro-1,4-diphosphinines fused to two TTF units

“…2 and S90, S91†) which correspond to the sequential one-electron processes, forming the related TTF radical cation and then dication. 22 The measured potentials (Table 3, with full reporting in Tables S1–S5,† for all the CV experiments in this work) fit well for alkyl substitution compared to reliable potentials for TTF on the Fc +/0 scale. 23 It is informative to review the Redox Molecular Orbitals (RMOs) controlling these processes (in these cases, the HOMO and LUMO of the substituted TTF, which are presented for 4c in Fig.…”