TY - JOUR
T1 - Cu(II)–Gd(III) 2D-coordination polymer based on two different organic linkers
AU - Cruz, Carlos
AU - Spodine, Evgenia
AU - Venegas-Yazigi, Diego
AU - Paredes-García, Verónica
N1 - Funding Information:
The authors acknowledge financial support from FONDECYT 1130643 , Proyecto Anillo CONICYT ACT 1404, CONICYT-FONDEQUIP/PPMS/EQM130086, and to the International collaborative projects LIA-MIF 836 and ECOS/CONICYT C15E02. The authors are also members of CEDENNA, Financiamiento Basal, FB0807. C.Cruz, thanks CONICYT Fellowship 2114042.
PY - 2017/11/4
Y1 - 2017/11/4
N2 - A new CuII–GdIII heterometallic coordination polymer was obtained by a two-step synthesis, using the molecular complex [Cu(H2IDC)2(2,2′-bipy)]·2H2O (1) as metalloligand and oxalate as auxiliary ligand (H3IDC = 1H-imidazole-4,5-dicarboxylic acid). The new extended heterometallic network [Gd(H2O)2(C2O4)Cu(IDC)]·H2O (2) crystallizes in a P1¯ triclinic space group presenting a 2D covalent structure. From a structural point of view, (2) can be defined as Gd-zigzag chains [Gd(H2O)2(C2O4)]+ linked by Cu-based molecules, [Cu(IDC)]−. A 3D structure is reached by non-covalent interactions between the layers. Also Gd⋯Cu interlayer interactions through syn–anti carboxylate ligands can be observed. Whereas, from room temperature to 100 K the network behaves as a paramagnet, below 20 K ferromagnetic interactions are observed. The ferromagnetic state was also corroborated by isothermal hysteresis loops measured at 2 K, giving values for Hc and Mr of 50 Oe and 500 emumol−1, respectively.
AB - A new CuII–GdIII heterometallic coordination polymer was obtained by a two-step synthesis, using the molecular complex [Cu(H2IDC)2(2,2′-bipy)]·2H2O (1) as metalloligand and oxalate as auxiliary ligand (H3IDC = 1H-imidazole-4,5-dicarboxylic acid). The new extended heterometallic network [Gd(H2O)2(C2O4)Cu(IDC)]·H2O (2) crystallizes in a P1¯ triclinic space group presenting a 2D covalent structure. From a structural point of view, (2) can be defined as Gd-zigzag chains [Gd(H2O)2(C2O4)]+ linked by Cu-based molecules, [Cu(IDC)]−. A 3D structure is reached by non-covalent interactions between the layers. Also Gd⋯Cu interlayer interactions through syn–anti carboxylate ligands can be observed. Whereas, from room temperature to 100 K the network behaves as a paramagnet, below 20 K ferromagnetic interactions are observed. The ferromagnetic state was also corroborated by isothermal hysteresis loops measured at 2 K, giving values for Hc and Mr of 50 Oe and 500 emumol−1, respectively.
KW - 2d covalent networks
KW - 3d–4f heterometallic networks
KW - Cu(II)–Gd(III) coordination polymer
KW - Ferromagnetic behaviour
KW - Two step synthesis
UR - http://www.scopus.com/inward/record.url?scp=85013910338&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2017.02.002
DO - 10.1016/j.poly.2017.02.002
M3 - Article
AN - SCOPUS:85013910338
SN - 0277-5387
VL - 136
SP - 117
EP - 124
JO - Polyhedron
JF - Polyhedron
ER -