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Publication Type
Journal Article
Author, Analytic
Singh-Wilmot, Marvadeen.A; Richards-Johnson, Roxan.U.; Dawkins, T.N; Lough, A.J
Author Affiliation, Ana.
n/a
Article Title
Lanthanide(III) coordination polymers from the exo-coordination of Na+: Syntheses, structures, luminescence, and decay dynamics
Medium Designator
n/a
Connective Phrase
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Journal Title
Inorganica Chimica Acta
Translated Title
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Reprint Status
Refereed
Date of Publication
2007
Volume ID
360
Issue ID
12
Page(s)
3727-3732
Language
n/a
Connective Phrase
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Location/URL
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ISSN
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Notes
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Abstract
[Na2[Ln2(sal)4(CF3SO3)2(H2O)4](CF3SO3)2]n Ln=Nd (1) and Eu (2) were synthesized from the reaction of salicylaldehyde, lanthanide(III) triflates, and sodium hydroxide. The compounds are iso-structural and possess a 2-D supramolecular network built up from discrete dinuclear Ln(III) units [Ln2(sal)4(CF3SO3)2(H2O)4] via exo-coordination of Na(CF3SO3). The sal ligands display 2-O coordination modes involving both the phenolic and carbonyl oxygen atoms while the triflates function as both 2 and 3 bridges. Each Ln(III) in the network is eight coordinate and in bicapped trigonal prism coordination geometry. Luminescence from [Na2[Eu2(sal)4(CF3SO3)2(H2O)4](CF3SO3)2]n showed temperature dependent sensitized emission with significant quadrupolar contribution and decay dynamical studies followed single exponential kinetics. Together these results indicate that in the presence of Na+ ions, sal, and triflate are useful ligands in the construction of Ln(III) coordination polymers with unusual luminescence and structures.....
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