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Download fileInfluence of Interpenetration in Diamondoid Metal–Organic Frameworks on the Photoreactivity and Sensing Properties
journal contribution
posted on 2016-04-13, 17:18 authored by In-Hyeok Park, Caroline
Evania Mulijanto, Hyeong-Hwan Lee, Yunji Kang, Eunji Lee, Anjana Chanthapally, Shim Sung Lee, Jagadese J. VittalThe degree of interpenetration
is known to influence the gas sorption,
catalytic, magnetic and nonlinear optical properties, chirality, and
sensing of various molecules but not the solid-state [2 + 2] photocycloaddition
reaction. In our previous studies of a solvothermal reaction using
dimethylacetamide (DMA) as one of the solvents, a photoreactive 6-fold
interpenetrated metal–organic framework with dia topology, [Zn(bpeb)(bdc)] (1) [bpeb = 1,4-bis[2-(4′-pyridyl)ethenyl]benzene;
bdc = 1,4-benzenecarboxylate], was isolated. Because of the slip-stacked
alignment of a dipyridyl ligand with two conjugated olefin bonds,
the [2 + 2] cycloaddition reaction occurs under UV light leading to
the formation of an organic polymer ligand fused with a coordination
polymer, 2. On the contrary, under similar conditions
when diethylformamide was used instead of DMA, a 5-fold interpenetrated
structure, 3, with the same dia topology
was obtained in this work.
This has been found to be photostable as also predicted from the analysis
of the solid state structure. All the solids show interesting photoluminescence
properties, and the emissions were preferentially quenched by curcumin
to make these materials as potentially useful sensing agents.