In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2003, No. 16 ( 2003-08), p. 3028-3033
Abstract:
Adducts of the Schiff base 2‐hydroxy‐ N ‐octadecyloxy‐4‐tetradecyloxybenzaldimine with tris(β‐dibenzoylmethanato)lanthanide( III ) complexes are described. The stoichiometry of the complexes is [Ln(dbm) 3 L x ], where Ln is a trivalent lanthanide ion (all lanthanides except Ce and Pm), Hdbm is dibenzoylmethane and L is the Schiff base; x = 2 for Ln = La−Er and x = 1 for Ln = Tm−Lu. The Schiff‐base ligands are in a zwitterionic form and coordinate through the phenolic oxygen only. The X‐ray single‐crystal structure of [La(dbm) 3 L′ 2 ] with L′ = N ‐butyl‐2‐hydroxy‐4‐methoxybenzaldimine is described. The solution structure of lanthanum( III ) complexes has been investigated by 1D and 2D 1 H NMR techniques. Although the long‐chain Schiff‐base ligand and the tris(β‐dibenzoylmethanato)lanthanide( III ) complexes are non‐mesomorphic, some of the adducts exhibit a monotropic smectic A phase. The mesomorphic behaviour depends on the lanthanide ion, in the sense that only a mesophase is observed for the series Ln = La−Eu, not for the heavier lanthanides. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2003:16
DOI:
10.1002/ejic.200300245
Language:
English
Publisher:
Wiley
Publication Date:
2003
detail.hit.zdb_id:
1475009-0
