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- aggregation classification "A1".
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- aggregation date "2013".
- aggregation format "application/pdf".
- aggregation hasFormat 3235334.bibtex.
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- aggregation isPartOf urn:issn:1932-7447.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Chemistry".
- aggregation title "Bipyridine-based nanosized metal-organic framework with tunable luminescence by a postmodification with Eu(III): an experimental and theoretical study".
- aggregation abstract "A gallium 2,2'-bipyridine-5,5'-dicarboxylate metal-organic framework, Ga(OH)(bpydc), denoted as COMOC-4 (COMOC = Center for Ordered Materials, Organometallics and Catalysis, Ghent University) has been synthesized via solvothermal synthesis procedure. The structure has the topology of an aluminum 2,2'-bipyridine-5,5'-dicarboxylate - the so-called MOF-253. TEM and SEM micrographs show the COMOC-4 crystals are formed in nanoplates with uniform size of 30-50 nm. The UV-vis spectra of COMOC-4 in methanol solution show maximal electronic absorption at 307 nm. This results from linker to linker transitions as elucidated by time-dependent density functional theory simulations on the linker and COMOC-4 cluster models. When excited at 400 nm, COMOC-4 displays an emission band centered at 542 nm. Upon immersion in different solvents, the emission band for the framework is shifted in the range of 525-548 nm depending on the solvent. After incorporating Eu3+ cations, the emission band of the framework is shifted to even shorter wavelengths (505 nm). By varying the excitation wavelengths from 250 to 400 nm, we can fine-tune the emission from red to yellowish green in the CIE diagram. The luminescence behavior of Eu3+ cations is well preserved and the solid-state luminescence lifetimes of tau(1) = 45 mu s (35.4%) and tau(2) = 162 mu s (64.6%) are observed.".
- aggregation authorList BK1186990.
- aggregation endPage "11310".
- aggregation issue "21".
- aggregation startPage "11302".
- aggregation volume "117".
- aggregation aggregates 4418424.
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