A stable and efficient photocatalytic hydrogen evolution system based on covalently linked silicon-phthalocyanine-graphene with surfactant

Silicon phthalocyanines: synthesis and resurgent applications

“…Lu et al observed that addition of surfactants like cetyltrimethylammonium bromide (CTAB) prevented aggregation and boosted the photocatalytic behaviour of a SiPc(phenyl) covalently functionalized and Pt NP loaded graphene construct, SiPc(phenyl)2G2/Pt (Ref: IntJHydE2016). 134 The integrated photocatalytic system, SiPc(phenyl)2G2/Pt/CTAB produced 18.2 μmol mg -1 of hydrogen on 10 h or UV-visible irradiation. These studies together established the potential of SiPcs in construction of water splitting photocatalytic systems.…”

“…Please do not adjust margins Please do not adjust margins Recent reports exploited covalently functionalized SiPcgraphene based organic hybrid composites as improved solar catalysts. 133,134 SiPc covalently functionalized with N-doped ultrasmall reduced graphene oxide (N-usRGO/SiPc) displayed strong absorption in the visible spectrum. 133 The fluorescence quenching (90%) of SiPc and improved photocurrent responses for N-usRGO/SiPc demonstrated the efficient photoinduced electron transfer process from SiPc to N-usRGO through covalent bonds (Fig.…”

From chemical curiosity to versatile building blocks: unmasking the hidden potential of main-group phthalocyanines in organic field-effect transistors

“…In the case of (HO) 2 -SiPc, it can also be prepared directly from DIII. As well, the two axial positions of the tetravalent metal centres can be displaced by various substituents such as phenyl, 132 phenoxy, 25,126,128,131 siloxy, 121,126,131,133 alkynyl, 134 diethylaminophenoxyethoxy, 135 1benzylpiperidin-4-oxy, 136 and even graphene 137 or benzyl ester dendrimers. 138 For this reason, a number of symmetrically and asymmetrically substituted X 2 -SiPc and X 2 -GePc derivatives have been developed over the years.…”

Understanding Surface Modulation to Improve the Photo/Electrocatalysts for Water Oxidation/Reduction

“…For example, molecules with increased magnitudes of aromaticity induce increased surface dipoles [100]. In addition, porphyrine and phthalocyanine moieties can inserted in the solid-solid junction to modulate the charge transfer at the interface [101,102]. These kinds of molecules are modulated by the various metal cation coordination and precisely tune the interface charge transfer.…”