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Structure modulation from unstable to stable MOFs by regulating secondary N-donor ligands.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 10/21/2018, Vol. 47 Issue 39, p14025-14032, 8p
- Publication Year :
- 2018
-
Abstract
- Four new Zn(ii)/Cd(ii)-based metal–organic frameworks (MOFs), namely {[Cd(tmdb)(bib)<subscript>0.5</subscript>]·solvents}<subscript>n</subscript> (YZ-7, YZ stands for the initials of the author Yong-Zheng Zhang), {[Cd(tmdb)(bmib)<subscript>0.5</subscript>]·solvents}<subscript>n</subscript> (YZ-8), {[Zn<subscript>2</subscript>(tmdb)<subscript>2</subscript>(bmib)]·solvents}<subscript>n</subscript> (YZ-9) and {[Zn<subscript>2</subscript>(tmdb)<subscript>2</subscript>(bmip)<subscript>2</subscript>]·solvents}<subscript>n</subscript> (YZ-10) have been solvothermally synthesized by using a semi-rigid ligand, 4,4′-(H-1,2,4-triazol-1-yl)methylene-dibenzoic acid (H<subscript>2</subscript>tmdb), and a series of secondary bis-imidazole ligands (bib = 1,4-bis(1H-imidazol-1-yl)benzene, bmib = 1,4-bis(2-methyl-1H-imidazol-1-yl)benzene, and bmip = 1,3-bis(2-methyl-1H-imidazol-1-yl)propane). By tuning the flexibility of the auxiliary ligands, these MOFs could be modulated from unstable (YZ-7–YZ-9) to stable (YZ-10) frameworks. Therefore, the gas adsorption properties of YZ-10 are further studied. Interestingly, it shows excellent CO<subscript>2</subscript> selective uptake over CH<subscript>4</subscript> and N<subscript>2</subscript>. At 298 K, both selectivities of CO<subscript>2</subscript>/CH<subscript>4</subscript> and CO<subscript>2</subscript>/N<subscript>2</subscript> show increasing trends and significantly reach 133.2 and 19.9 at 1 atm, respectively. Also, YZ-10 shows uncommon H<subscript>2</subscript> selective uptake over N<subscript>2</subscript> at 77 K. Moreover, the luminescence properties of YZ-8–YZ-10 were studied in the solid state at room temperature. [ABSTRACT FROM AUTHOR]
- Subjects :
- LIGANDS (Chemistry)
METAL-organic frameworks
LIGAND exchange reactions
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 47
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 132248021
- Full Text :
- https://doi.org/10.1039/c8dt02858c