A self-sensitized Co (II)-MOF for efficient visible-light-driven hydrogen evolution without additional cocatalysts
Herein, a new metal-organic framework (MOF) {[Co(azpy) (bps) (H2O)]·DMF·2.3H2O}n, 1, (azpy = 4,4′-azopyridine, H2bps = 4, 4′- bibenzoic acid-2, 2′-sulfone (H2bps) has been synthesized by solvothermal method. Complex 1 was characterized in detail by X-ray single-crystal diffraction, elemental ana...
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Published in | Journal of solid state chemistry Vol. 304; p. 122609 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Inc
01.12.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Herein, a new metal-organic framework (MOF) {[Co(azpy) (bps) (H2O)]·DMF·2.3H2O}n, 1, (azpy = 4,4′-azopyridine, H2bps = 4, 4′- bibenzoic acid-2, 2′-sulfone (H2bps) has been synthesized by solvothermal method. Complex 1 was characterized in detail by X-ray single-crystal diffraction, elemental analysis, IR spectrum, PXRD and thermogravimetric analysis. X-ray single-crystal diffraction analysis for 1 indicates that two azpy ligands bearing unusual cis-configuration bridge two Co2+ cations, forming an interesting one-dimensional nanopore channel. And these nanopore channels finally form a three-dimensional framework by multiple π···π stacking interactions. Besides, visible-light-driven H2 production exhibited that complex 1 displayed a high-efficiently photocatalytic hydrogen generation (1.44 mmol g−1·h−1) without additional photosensitizers and cocatalysts. Moreover, the photocurrent response of 1, solid-state UV–Vis absorption spectra of 1 and free ligands were also explored.
A new three-dimensional Co (II) based MOF structure was synthesized successfully by one-dimensional pore channel accumulation. The MOF displays a high-efficient photocatalytic hydrogen evolution capacity without additional photosensitizers and cocatalysts, arising from the electron transfer between the ligand and the metal in the stacking system. [Display omitted]
•One new 3D Co (II) based MOF structure was synthesized successfully by one-dimensional pore channel accumulation.•The MOF displays a high-efficient photocatalytic hydrogen evolution capacity without additional photosensitizers and cocatalysts.•High-efficient photocatalytic hydrogen of the MOF arise from the electron transfer between the ligand and the metal. |
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ISSN: | 0022-4596 1095-726X |
DOI: | 10.1016/j.jssc.2021.122609 |