期刊
MOLECULES
卷 27, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/molecules27206873
关键词
metal-organic frameworks; porous material; crystal structure; CO2 adsorption; photothermal conversion
资金
- Natural Science Foundation of Henan Province [212300410209]
- Key Scientific Research Projects of Higher Education of He'nan Province [22A150016]
- Shanghai Science and Technology Committee [19DZ2270100]
- Heluo Young Talent Lifting Project [2022HLTJZC09]
A new metal-organic framework (MOF) with high CO2 adsorption capacity and good photothermal conversion performance has been synthesized and characterized in this study.
A new metal-organic framework (MOF), [Co-2(L)(2)(azpy)](n) (compound 1, H2L = 5-(pyridin-4-ylmethoxy)-isophthalic acid, azpy = 4,4 '-azopyridine), was synthesized by a solvothermal method and further characterized by elemental analysis, IR spectra, thermogravimetric analysis, single-crystal and powder X-ray diffraction. The X-ray single-crystal diffraction analysis for compound 1 indicated that two cis L2(2-) ligands connected to two cobalt atoms resulted in a macrocycle structure. Through a series of adsorption tests, we found that compound 1 exhibited a high capacity of CO2, and the adsorption capacity could reach 30.04 cm(3)/g. More interestingly, under 273 K conditions, the adsorption of CO2 was 41.33 cm(3)/g. In addition, when the Co-MOF was irradiated by a 730 nm laser, rapid temperature increases for compound 1 were observed (temperature variation in 169 s: 26.6 degrees C), showing an obvious photothermal conversion performance. The photothermal conversion efficiency reached 20.3%, which might be due to the fact that the parallel arrangement of azo units inhibited non-radiative transition and promoted photothermal conversion. The study provides an efficient strategy for designing MOFs for the adsorption of CO2 and with good photothermal conversion performance.
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