## Abstract

The reaction of Ln(NO_{3})_{3(aq)} with K _{3}[Fe(CN)_{6}] or K_{3}[Co(CN)_{6}] and 2,2′-bipyridine in water/ethanol led to 13 one-dimensional complexes: trans-[M(CN)_{4}(μ-CN)_{2}Ln(H_{2}O) _{4}(bpy)]_{n}·4nH_{2}O·1.5nbpy (Ln = Eu^{3+}, Tb^{3+}, Dy^{3+}, Ho^{3+}, Er ^{3+}, Tm^{3+}, Lu^{3+}; M = Fe^{3+}, Co ^{3+}). The structures for [EuFe]_{n} (1), [TbFe]_{n} (2), [DyFe]_{n} (3), [HoFe]_{n} (4), [ErFe]_{n} (5), [TmFe]_{n} (6), [LuFe]_{n} (7), [EuCo]_{n} (8), [TbCo]_{n} (9), [DyCo]_{n} (10), [HoCo]_{n} (11), [ErCo]_{n} (12), and [TmCo]_{n} (13) have been solved: they crystallize in the triclinic space group P1 and are isomorphous. They exhibit a supramolecular architecture created by the interplay of coordinative, hydrogen bonding, and π-π interactions. A stereochemical study of the eight-vertex polyhedra of the lanthanide ions, based on continuous shape measures, is presented. The Ln^{3+}-Fe^{3+} interaction is antiferromagnetic in [DyFe]_{n} and [TbFe]_{n}. For [EuFe]_{n}, [HoFe]_{n}, [ErFe]_{n}, and [TmFe]_{n}, there is no sign of any significant interaction. The magnetic behavior of [DyFe]_{n} suggests the onset of weak long-range ferromagnetic ordering at 2.5 K.

Original language | English (US) |
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Pages (from-to) | 6949-6958 |

Number of pages | 10 |

Journal | Inorganic chemistry |

Volume | 44 |

Issue number | 20 |

DOIs | |

State | Published - Oct 3 2005 |

Externally published | Yes |

## ASJC Scopus subject areas

- Physical and Theoretical Chemistry
- Inorganic Chemistry

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Dive into the research topics of 'Magnetism of cyano-bridged Ln^{3+}-M

^{3+}complexes. Part II: One-dimensional complexes (Ln

^{3+}= Eu, Tb, Dy, Ho, Er, Tm; M

^{3+}= Fe or Co) with bpy as blocking ligand'. Together they form a unique fingerprint.