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Two copper(<scp>i</scp>) cyanide coordination polymers modified by semi-rigid bis(benzimidazole) ligands: syntheses, crystal structures, and electrochemical and photocatalytic properties
- Source :
- Dalton Transactions. 45:17474-17484
- Publication Year :
- 2016
- Publisher :
- Royal Society of Chemistry (RSC), 2016.
-
Abstract
- Two Cu(i) cyanide coordination polymers (CPs), namely, [Cu2(L1)(CN)2]n (1) and [Cu2(L2)(CN)2]n (2) (L1 = 4,4'-bis(2-methylbenzimidazol-1-ylmethyl)biphenyl, L2 = 4,4'-bis(5,6-dimethylbenzimidazol-1-ylmethyl)biphenyl) were synthesized and structurally characterized by single crystal X-ray diffraction, IR spectroscopy, X-ray powder diffraction and elemental analysis. The cyanide ligands in these CPs are generated in situ from the C-C bond cleavage of acetonitrile under solvothermal conditions, which is environmentally friendly and used conveniently. CP 1 features a three-fold interpenetration 3D framework consisting of Cu10(CN)6(L1)4 rings, which represents the first investigation on introducing bis(benzimidazole) ligands into copper(i) cyanide CPs with ThSi2 topology, while CP 2 exhibits a two-dimensional (6,3) layered structure containing Cu6(CN)4(L2)2 rings. The thermal stabilities, and photoluminescence and electrochemical behavior in the solid state of CPs 1 and 2 have been investigated in detail. Moreover, both CP 1 and CP 2 manifest promising photocatalytic activities (photodegradation efficiency using CP 1 is 90.8% and using CP 2 is 87.2%) for the degradation of methylene blue (MB) under UV light irradiation. A possible photocatalytic mechanism is suggested by introducing t-butyl alcohol (TBA) as a widely used ˙OH scavenger.
- Subjects :
- Biphenyl
Benzimidazole
010405 organic chemistry
Cyanide
Copper(I) cyanide
Infrared spectroscopy
Crystal structure
010402 general chemistry
Photochemistry
01 natural sciences
0104 chemical sciences
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Polymer chemistry
Metal-organic framework
Acetonitrile
Subjects
Details
- ISSN :
- 14779234 and 14779226
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi.dedup.....81ccb56cddd248019289a88e320c121e