Synthesis of novel tetrazine based D-π-A organic dyes for photoelectrochemical and photocatalytic hydrogen evolution

Photocatalytic H2 Production from Water by Metal‐free Dye‐sensitized TiO2 Semiconductors: The Role and Development Process of Organic Sensitizers

“…It was expected that MK‐8 would exhibit superior photocatalytic performance since it had the acceptor group with more electronegativity, and also higher molecular absorption coefficient corresponding to better light‐harvesting. However, MK‐8 showed unexpectedly lower photochemical activity for the both photoelectrochemical and photocatalytic H 2 evolution, which can be blamed on the unfavorable aggregation formation of MK‐8 on the surface of TiO 2 verified by EDX spectra data [48] …”

“…However, MK-8 showed unexpectedly lower photochemical activity for the both photoelectrochemical and photocatalytic H 2 evolution, which can be blamed on the unfavorable aggregation formation of MK-8 on the surface of TiO 2 verified by EDX spectra data. [48] Haoran Ding et al designed a new organic blue-colored dye S5 with indeno[1,2-b]thiophene functionalized triphenylamine (ITTPA) donor, cyclopentadithiophene (CPDT) π-linker and 2,3diphenylquinoxaline (QT) auxiliary acceptor. For comparison, a similar dye S6 without auxiliary acceptor QT was also synthesized ( Figure 20 and Table 1, No.…”

“…A) Structures of dyes MK-2 and MK-8, B) corresponding H 2 production plots of MK-2, and C) corresponding H 2 production plots of MK-8.Reproduced from Ref [48]…”

Molecular Organic Sensitizers for Photoelectrochemical Water Splitting

“…[48] Patir et al have synthesized two different D-π-A dyes with a triarylamine D group, an extended π-spacer (composed by two thienyl rings, a tetrazine, and a phenyl ring), and a cyanoacrylic group or a simple carboxylic functionality as the A/anchoring end-group. [59] These dyes were studied both in photocatalysis and in DS-PEC with triethanolamine (TEOA) as a SED, thus without WOC. They measured only the current generated under irradiation and found a good stability under 350 s irradiation and photocurrent densities up to nearly 200 μA cm -2 .…”

A Novel Donor-π-Acceptor Type Sensitizer for Dye Sensitized Photochemical Hydrogen Generation

“…Dessi et al investigated that photocatalytic HER performances of TPA based D-π-A dyes are improved by increasing donor moieties with the hexyloxy chains attached to the on its terminal TPA group [24]. Moreover, our research group were reported TPA based D-π-A dye sensitized TiO2 photocatalysts for photocatalytic and photoelectrochemical hydrogen evolution in the triethanolamine (TEOA) sacrificial electron donor media under solar irradiation [25][26][27][28]. In these works, firstly, photocatalytic and photoelectrochemical activities on the HER were examined in the absence and presence of extra electron donating two hexyloxy groups on the TPA.…”