Journal
DYES AND PIGMENTS
Volume 190, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109285
Keywords
Photodegradation; Methyl violet; Mechanism; Zn-MOF; Isomerism
Funding
- Sichuan University of Science and Engineering [2019RC21, 2017RCL46]
- Opening Project of Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education [LYJ18023]
- Open Project of Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province [CSPC202007]
- Education Committee of Sichuan Province [17ZA0275]
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Two new Zn(II) metal-organic-frameworks with supramolecular isomerism have been synthesized using different ligands and display efficient photocatalytic properties for the degradation of model aromatic dye. Density of states calculations explain the photocatalytic mechanism in both frameworks, while chromatography-mass spectrometry further validates the potential photodegradation mechanism.
Two new Zn(II) metal-organic-frameworks displaying supramolecular isomerism have been synthesized using 1,3-bis(2-methylimidazolyl)propane (bmp) and 1,3,5-benzenetricarboxylic acid (H3BTC). The isomer [NH2(CH3)2][Zn2O(bmp)(BTC)] (1) adopt 2-fold interpenetrating framework topology defined by bey-type of interpenetration while another isomer [NH2(CH3)2][Zn2O(bmp)(BTC)].1.5DMF (2) adopt 2-fold interpenetrating framework topology defined by CdSO4-type of interpenetration. The difference in topologies of two MOFs can be ascribed to the flexibility of 1,3-bis(2-methylimidazolyl)propane ligand; because of which 2 lies on a crystallographic mirror plane. Both MOFs display efficient photocatalytic properties for the photodegradation of model aromatic dye methyl violet (MV). The photocatalytic mechanism in both the MOFs have been explained by using density of states calculations. Moreover, chromatography-mass spectrometry (LC-MS) has been performed to further validate the potential photodegradation mechanism of MV.
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