Visible-to-near-infrared light-harvesting A-π-D-π-A porphyrins for boosted photocatalytic hydrogen evolution

Abstract

Developing visible-to-near-infrared light-harvesting porphyrin photosensitizers is very important for efficient photocatalytic hydrogen evolution (PHE) since most of the tetra-meso-substituted porphyrins absorb up to the visible region only. Herein, two new...

Design of AIEgen‐based porphyrin for efficient heterogeneous photocatalytic hydrogen evolution

“…nano-sized aggregates of TPE-ZnPF are useful to provide a large active surface area and thereby more photocatalytic reactive sites on the surface of TPE-ZnPF and simultaneously enhanced PHE than agglomerated morphology of Ph-ZnPF. [21] Moreover, dynamic light scattering analysis (Figure S13) indicates that the average size of TPE-ZnPF aggregates is 189.0 nm which also matches the SEM analysis. As seen in Figure 3B, both porphyrins exhibited two emission peaks in the range of 600-700 nm under the excitation of Soret-band absorption (420 nm), revealing that they are related to the porphyrin ring.…”

Unleashing the Potential of Coupled Substituted 3D Niobate Perovskite Oxides in Cocatalyst-free Photocatalytic Hydrogen Evolution

“…3 ) and Co (t 2g 6 ), they do not undergo FOJT distortion, but Mn 3+ (t 2g 4 ) and Fe 3+ (t 2g 5 ) with unsymmetrical configuration are FOJT active. 43 It means in the Mn and Fe perovskite niobates, competing FOJT and SOJT interactions are operative in the B-cation octahedral network.…”

“…Solar energy is revolutionizing the way we harness energy . Among various approaches of solar to chemical energy conversion, solar-driven water splitting is attracting increasing interest to generate hydrogen, which has a high specific energy density (143 MJ kg –1 ), nonpolluting nature and is an easily storable clean energy fuel. − Semiconductor design plays a crucial role in the overall activity of photocatalysts. − Several 3D perovskite oxides like CaTiO 3 , NaTaO 3 , − SrTiO 3 , − and NaNbO 3 have emerged as promising candidates for photocatalytic water splitting. These materials possess exceptional stability and can resist photo corrosion, ensuring their long-term effectiveness.…”

Self-assembly of Pt(ii)-tetrakis(pentafluorophenyl)porphyrin via F⋯F interaction for efficient cocatalyst-free photocatalytic hydrogen evolution

“…17,18 PHE is a sustainable green technology to convert water (H 2 O) into hydrogen (H 2 ) through articial photosynthesis. [19][20][21][22][23][24][25][26][27] To date, a number of SA porphyrins have been studied for PHE and their performances mainly depend on the morphology and the capability of photoinduced charge separation and migration of charge carriers. 4 However, while SA porphyrins possess good lightharvesting properties in the solid state compared to their dilute solutions, they might suffer from aggregation caused quenching (ACQ) of photoluminescence due to the strong intermolecular p-p (C/C/C/H) interactions of porphyrin molecules in the solid state.…”