Group I cation templated formation of luminescent mono- and bis-substituted thionaphthol heterobimetallic complexes of Pr, Nd, Eu and Tb
Natrajan, Louise S.; Blake, Alexander J.; Wilson, Claire; Weinstein, Julia A.; Arnold, Polly L.; Natrajan Louise S.; School of Chemistry, The University of Nottingham; Blake Alexander J.; School of Chemistry, The University of Nottingham; Wilson Claire; School of Chemistry, The University of Nottingham; Weinstein Julia A.; Department of Chemistry, University of Sheffield; Arnold Polly L.; School of Chemistry, The University of Nottingham
Журнал:
Dalton Transactions
Дата:
2006
Аннотация:
Metathesis of lanthanide tris di-tert-butyl β-diketonates ([Ln(thd)3] Ln = Pr, Nd, Eu, Tb) with one or two equivalents of group 1 salts of the sulfur bridged binaphtholate dianion [1,1â ²-S(2-OC10H4Bu<sup>t</sup>2-3,6)2]<sup>2â </sup>, [M2L], M = K, Li affords luminescent mono- and bis-ligand substituted complexes ML[LnL(thd)2].L; M = K, Ln = Pr 1, Nd 2, Eu 3 and Tb 4 (L = thf, diethyl ether or toluene) and M(thf)2[LnL2(thd)]; M = Li, Ln = Pr 5, Nd 6, Eu 7, Tb 8. The potassium salt [K2L] affords mono-L substituted complexes most cleanly, while the lithium salt [Li2L] yields the bis-L substituted complexes most cleanly. The L ligands function as antenna for the sensitised lanthanide-centred emission in Eu<sup>3+</sup> and Tb<sup>3+</sup> complexes. The X-ray single-crystal structures of mono- and bis-L lanthanide complexes of Nd<sup>3+</sup> are presented.
238.7Кб