Cover Picture: Physical Properties of Superbulky Lanthanide Metallocenes: Synthesis and Extraordinary Luminescence of [EuII(CpBIG)2] (CpBIG=(4‐nBu‐C6H4)5‐Cyclopentadienyl) (Chem. Eur. J. 37/2013). Issue 37 (2nd September 2013)

• Record Type: Journal Article
• Authors: Harder, Sjoerd; Naglav, Dominik; Ruspic, Christian; Wickleder, Claudia; Adlung, Matthias; Hermes, Wilfried; Eul, Matthias; Pöttgen, Rainer; Rego, Daniel B.; Poineau, Frederic; Czerwinski, Kenneth R.; Herber, Rolfe H.; Nowik, Israel
• Is Part Of: Chemistry. Volume 19:Issue 37(2013)
• Page Start: 12173
• Page End: 12173
• Publication Date: 2013-09-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201390139
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>High luminescence</bold> is observed for an Eu²⁺ ion sandwiched between two bulky cyclopentadienyl ligands, as described by S. Harder et al. in their Full Paper on <ext-link ext-link-type="doi" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">page 12272 ff.</ext-link> In contrast to [Eu(Cp*)₂] (Cp* = pentamethylcyclopentadienyl), which hardly shows luminescence, a quantum yield of 45% is found for the europocene [Eu(Cp^BIG)₂] (Cp^BIG=(4‐<italic>n</italic>Bu‐C₆H₄)₅‐cyclopentadienyl). Magnetic susceptibility measurements, and Mössbauer as well as EXAFS spectroscopy rule out possible oxidation‐state ambiguities for the lanthanide(II) metallocenes of Sm, Eu, and Yb.<boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg36r47xn1" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>