Self-assembly of heterometallic LnIII–CoII coordination polymers: syntheses, structures, and magnetic studies. Issue 43 (13th October 2015)

• Record Type: Journal Article
• Authors: Zhao, Xiao-Qing; Liu, Xu-Hui; Kang, Xiao-Min; Zhao, Bin
• Is Part Of: Dalton transactions. Volume 44:Issue 43(2015)
• Page Start: 18856
• Page End: 18863
• Publication Date: 2015-10-13
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt02280k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Seven novel 2D [Ln–Co] compounds were structurally and magnetically characterized and showed rare ferromagnetic coupling between heavy Ln(iii ) and Co(ii ). Abstract : A family of heterometallic 4f–3d coordination polymers with the common formula [LnCo1.5 (L)2 (H2 O)5 ] n (Ln = Pr(1 ), Eu(2 ), Gd(3 ), Tb(4 ), Dy(5 ), Ho(6 ), and Er(7 ), and H3 L = 4-(carboxymethoxy)isophthalic acid) was obtained under solvothermal conditions with the effect of NaN3, which was involved in the reactions but not in the final structure. All of the compounds were isostructural, and had a two-dimensional wave-like structure based on centrosymmetric [LnO2 Co]–Co–[LnO2 Co] motifs. The results of the magnetic measurements displayed that ferromagnetic interactions occurred in the frameworks (3–7 ) containing "heavy" lanthanide ions (Gd, Tb, Dy, Ho, and Er), which should be ascribed to the coupling between the Ln III and Co II ions. Furthermore, compound5, containing Dy III ions, displayed field-induced slow magnetic relaxation.