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Rational assembly of functional Co-MOFs via a mixed-ligand strategy: synthesis, structure, topological variation, photodegradation properties and dye adsorption
Ist Teil von
CrystEngComm, 2018, Vol.20 (34), p.4973-4988
Ort / Verlag
Cambridge: Royal Society of Chemistry
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Four novel Co(
ii
) metal–organic frameworks, namely [Co
2
(4,4′-cpmb)
2
(1,1′-bbi)
2
]
n
(
1
), [Co(4,4′-cpmb)(4,4′-bbibp)]
n
(
2
), {[Co(4,4′-cpmb)(tib)]·3(H
2
O)}
n
(
3
) and {[Co(4,4′-sdc)(tib)]·(H
2
O)}
n
(
4
) (flexible 4,4′-cpmb = 4-(4-carboxylphenylmethylthio)benzoic acid, rigid 4,4′-sdc = 4,4′-stilbenedicarboxylic acid, flexible 1,1′-bbi = 1,1′-(1,4-butanediyl)bis(imidazole), rigid 4,4′-bbibp = 4,4′-bis(benzoimidazo-1-ly)biphenyl and rigid tib = 1,3,5-tris(1-imidazolyl)benzene) were synthesized employing a rational design approach under solvothermal conditions and further characterized by elemental analysis, IR spectra, thermogravimetric (TG) analysis, powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction. The four Co-MOFs display different interpenetrated structures due to the flexibility of O/N-donor ligands. Single-crystal X-ray diffraction analysis reveals that complex
1
displays a 6-fold interpenetrating class
Ia
net with the point Schläfli symbol of (6
6
). Complex
2
shows a 3-fold interpenetrating
sqc5
net with the point Schläfli symbol of (6
6
·8). Complexes
3
and
4
exhibit a 2-fold interpenetrating 4-connected
sql
topology with the point Schläfli symbol of (4
4
·6
2
). The photodegradation properties and dye adsorption capacity of complexes
1–4
are investigated, and the framework integrity of complexes
1–4
can be well-retained.