Abstract
Two coordination polymers, [Co(µ4-L)(H2O)2]n (1) and [Ni(µ-L)(H2O)4]n (2), were solvothermally assembled from the corresponding metal(II) chlorides and biphenyl-4,4-dioxydiacetic acid (H2L) as a flexible dicarboxylate linker. The cobalt(II) compound 1 featured a layer-pillared 3D metal-organic network with a cds topology, while the nickel(II) derivative 2 represented a linear chain 1D coordination polymer with a 2C1 topology. The µ4− and µ-L2− linkers exhibited different denticity and coordination modes in the synthesized compounds, thus contributing to their structural diversity. The dimensionality of 1 and 2 had an influence on their thermal stability and decomposition processes, which were investigated in detail by TG-DSC and TG-FTIR methods. Thermal decomposition products of coordination polymers were also analyzed by PXRD, confirming the formation of Co3O4/CoO and NiO as final materials. The obtained compounds broaden a family of coordination polymers assembled from flexible dicarboxylate linkers.
Highlights
We examined the thermal stability and decomposition processes of 1 and and TG-Fourier transform infrared spectroscopy (FTIR) methods
We further explored biphenyl-4,4’-dioxydiacetic acid (H2 L) as a flexible dicarboxylate linker for the solvothermal assembly of cobalt(II) and nickel(II) coordination polymers
The dimensionality of the obtained compounds had an influence on their thermal stability and decomposition processes, which were investigated in detail by TG-differential scanning calorimetry (DSC) and TG-FTIR methods
Summary
Coordination polymers represent a very attractive generation of functional materials due to their prominent physico-chemical properties, which arise from the combination of inorganic and organic building blocks that are joined via strong covalent bonds into the infinite one-, two- or three-dimensional structures [1,2,3,4,5]. These materials exhibit a great potential for applications in many areas, including storage and separation of gases and small molecules, catalysis, chemical sensors, medicine, and magnetic and photonic materials [6,7,8,9,10,11,12,13,14,15,16,17]. Apart from the polycarboxylic acid linkers that comprise a rigid biphenyl, naphthalene, pyrene, or pyrazine moiety, diverse
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