{[Ln(hfac)3]2[Cu(hfac)2]3(NIT‐Pyrim)2(H2O)2} (LnIII = Gd, Ho, Er): Unique Nitronyl Nitroxide Bridged 3d–4f Heterometallic Clusters. Issue 3 (21st August 2017)

• Record Type: Journal Article
• Authors: Li, Cun; Li, Hongdao; Xie, Jing; Yang, Meng; Wang, Xiufeng; Li, Licun
• Other Names: Le Guennic Boris guestEditor.; Chastanet Guillaume guestEditor.; Pillet Sébastien guestEditor.; Clérac Rodolphe guestEditor.
• Is Part Of: European journal of inorganic chemistry. Issue 3/4(2018)
• Page Start: 525
• Page End: 530
• Publication Date: 2017-08-21
• Subjects: 3d‐4f complexes -- Clusters -- Nitronyl nitroxide -- Radicals -- Magnetic properties -- Heterometallic compounds -- Tridentate ligands; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201700576
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : A series of novel 3d–4f heterometallic complexes involving pyrimidine‐substituted nitronyl nitroxide radicals with the formula {[Ln(hfac)3 ]2 [Cu(hfac)2 ]3 (NIT‐Pyrim)2 (H2 O)2 } [Ln III = Gd (1 ), Ho (2 ), Er (3 ); NIT‐Pyrim = 2‐(5‐pyrimidinyl)‐4, 4, 5, 5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide] have been isolated and characterized in terms of structure and magnetism. These 2p–3d–4f compounds consist of Cu II 3 Ln III 2 pentanuclear clusters in which two NIT‐Pyrim radicals act as µ3 bridges. All compounds display ferromagnetic interactions between the radicals and metal ions. Slow magnetic relaxation was observed in the Ho complex, which represents the first example of a radical–Ho cluster exhibiting magnetic relaxation behavior. Abstract : Three novel 3d–4f pentanuclear clusters linked by pyrimidine‐substituted nitronyl nitroxides have been achieved. The nitronyl nitroxide radical behaves as a tridentate ligand. Ferromagnetic couplings are observed between the metal ions and the radical ligands. Furthermore, Ho derivatives exhibit slow magnetic relaxation behavior, which is the first example of a nitronyl nitroxide–Ho‐based SMM.