Slow magnetic relaxation for cobalt(ii) complexes in axial bipyramidal environment: an S = 1/2 spin case. Issue 23 (10th May 2022)

• Record Type: Journal Article
• Authors: Pilichos, Evangelos; Font-Bardia, Mercè; Cano, Joan; Escuer, Albert; Mayans, Júlia
• Is Part Of: Dalton transactions. Volume 51:Issue 23(2022)
• Page Start: 8986
• Page End: 8993
• Publication Date: 2022-05-10
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt00880g
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The slow magnetic relaxation for Co II cations in an unusual axial bipyramidal environment and psudo-spin 1/2 has been explored, showing a Direct plus Raman relaxation mechanism. Abstract : A new family of magnetically mononuclear cobalt(ii ) complexes with formula [{Ni II (L)Co II (H2 O)2 (MeOH)}{Ni II (L)}2 ](ClO4 )2 where H2 L1 = bis( N, N ′-bis(3-methoxysalicylidene)ethylene-1, 2-diamine) (1 ), H2 L2 = bis( N, N '-bis(3-methoxysalicylidene)propane-1, 2-diamine) (2 ) and [{Cu II (L4)}2 Co II ](ClO4 )2 (3 ) where H2 L4 = bis( N, N ′-bis(3-ethoxysalicylidene)cyclohexane-1, 2-diamine) have been obtained employing non chiral or enantiomerically pure Schiff bases. The structural studies have been carried out by single crystal X-ray and powder diffraction. Dynamic magnetic studies indicate that some members of this family present field induced slow relaxation of the magnetization and its response has been compared with the magnetically diluted [Zn0.9 Co0.1 ] complex 1D . Ultra-low frequency Raman spectroscopy has been used to relate the slow relaxation with lattice vibrations.