1D alignment of Co(ii) metalated porphyrin–napthalimide based self-assembled nanowires for photocatalytic hydrogen evolution

Abstract

Splitting of water into hydrogen and oxygen under visible light is an emerging phenomenon in green energy technology. Nevertheless, selecting of an appropriate photocatalyst is rather significant to enhance the...

Conducting 1D nanostructures from light-stimulated copper-metalated porphyrin–dibenzothiophene

“…Hence, the protonation and anion binding of P Fb -DBT and P Cu -DBT not only regulate the optical and electrochemical properties in the solution state but also have an impact on molecular packing, as we can conclude from the formation of nanoflakes and 1D nanostructures. 44–50…”

“…Hence, the protonation and anion binding of P Fb -DBT and P Cu -DBT not only regulate the optical and electrochemical properties in the solution state but also have an impact on molecular packing, as we can conclude from the formation of nanoflakes and 1D nanostructures. [44][45][46][47][48][49][50] Furthermore, powder X-ray diffraction analyses of neutral and charged samples were recorded and they were found to be crystalline and amorphous in nature under different conditions (Fig. 6a).…”

Improving the photocatalytic activity of porphyrins for hydrogen evolution from water splitting through combined effects inspired by meso-carboxyfuryl substitution

“…13,14 Meso-substitution is more favorable and feasible for porphyrins relative to b-substitution, and is often used to modulate the properties of porphyrins. [15][16][17][18][19] Many strategies have been reported to optimize porphyrin's properties by meso-substitution, including (1) extending the conjugated structure of porphyrin molecules and shifting their absorption toward long wavelengths, 20,21 (2) modulating the affinity of porphyrin molecules with reaction substrates or with other moieties, 18,22 (3) improving the transfer and separation efficiency of photogenerated carriers through a built-in electric field or D-A supramolecular system, [23][24][25][26][27] and so on. In the case of photocatalytic H 2 evolution from water splitting, the porphyrin modified with the -COOH, -SO 3 H group usually exhibits more effective photocatalytic activity than that with other polar groups, because of the high affinity of -COOH and -SO 3 H groups with water molecules as well as the large dipole moment.…”

Conducting 2D Nanosheets: Photo Driven Crystallinity in Self-Assembled Cu (II) Metalated Porphyrin-Bispyridylquinoxaline

“…Further, to improve the conductivity at self-assembled films, the structure of the molecule is modified with the symmetric substituent of bispyridylquinoxaline to the meso position of porphyrin through ethynyl group and impeding the other two side meso positions by the octyloxy functionalized phenyl group. Hence, these sorts of symmetric structures facilitate the generation of the extended supramolecular nanostructures by external stimuli that leads to improvement in electronic properties. − In this regard, we have designed and developed three molecules such as freebase porphyrin-bispyridylquinoxaline (P Fb -DPQ) and transition metal (copper and zinc) substituted P-DPQ systems (P Cu -DPQ and P Zn -DPQ) (Figure ). As known, transition metals possess excellent binding energy, electron affinity, ionization, and chemical hardness .…”