Thermal and Magnetic Diversity in the Behaviour of the CuII‐bdc‐bpa1 System: 1D, 2D and Interpenetrated 3D Frameworks. Issue 29 (5th September 2016)

• Record Type: Journal Article
• Authors: Bravo‐García, Laura; Barandika, Gotzone; Fidalgo‐Marijuan, Arkaitz; Bazan, Begoña; Urtiaga, Miren Karmele; Lezama, Luis; Arriortua, María Isabel
• Is Part Of: European journal of inorganic chemistry. Issue 29(2016)
• Page Start: 4783
• Page End: 4791
• Publication Date: 2016-09-05
• Subjects: Metal–organic frameworks -- Copper -- Magnetic properties; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600683
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Metal organic frameworks (MOFs) are crystalline materials based on connections between metal ions through organic ligands. The combination of polycarboxylate anions and dipyridyl ligands is an effective strategy for producing extended structures. In this sense, the combination of bpa with m ‐bdc [bpa = 1, 2‐bis(4‐pyridyl)ethane, m ‐bdc = 1, 3‐benzenedicarboxylate] has produced three new Cu II ‐based networks with different dimensionalities, namely the 1D [Cu( m ‐bdc)(bpa)0.5 (H2 O)dmf]· 0.5H2 O (1, synthesis based on sonication and slow evaporation), the 2D [Cu6 ( m ‐bdc)6 (bpa)6 (dmf)3 ]· 8dmf (2, microwave synthesis) and the 3D [Cu4 ( m ‐bdc)4 (bpa)2 dmf]· dmf (3, microwave synthesis). The three compounds have been structurally characterized by means of single‐crystal X‐ray diffraction, IR and UV/Vis spectroscopy and elemental analysis. An unprecedented Cu II dimer has been observed for compound3 . The thermal behaviour of the compounds was analysed by thermogravimetry (TG/DSC) and X‐ray thermodifractometry (TDX), and it was concluded that the dimensionality plays an important role in their thermal properties. Electronic paramagnetic resonance and magnetic susceptibility measurements for compounds1 and3 showed that antiferromagnetic interactions exist between the metal ions. Abstract : The combination of 1, 2‐bis(4‐pyridyl)ethane and 1, 3‐benzenedicarboxylate ligands has led to three new Cu II ‐based networks with different dimensionalities, namely the 1D [Cu( m ‐bdc)(bpa)0.5 (H2 O)dmf]· 0.5H2 O, the 2D [Cu6 ( m ‐bdc)6 (bpa)6 (dmf)3 ]· 8dmf and the 3D [Cu4 ( m ‐bdc)4 (bpa)2 dmf]· dmf (bdc = 1, 3‐benzenedicarboxylate, bpa = 1, 2‐bis(4‐pyridyl)ethane).