Synthesis and Characterization of a New Infinite 1D Polyoxomolybdate Polymer Further Connected via Cu(I) Nicotinate Subunits

Polyoxomolybdates form an interesting class of inorganic materials, which exhibit a wide range of intriguing architectures [1]. They also have a great potential for applications based on their interesting physical behavior, e. g. in catalysis, for electrical conduction, optical response, and magnetism [2]. Many of these organic-inorganic hybrid molybdates are synthesized in the presence of organic ligands under hydrothermal conditions and exhibit multidimensionional structures [3–5]. Furthermore, polymeric structures based on infinite chains of oxomolybdate polyhedra have been reported as dimolybdate, trimolybdate, tetramolybdate and octamolybdate systems, which form the large majority [6]. Occasionally pentamolybdate and heptamolybdate systems have also been observed [7]. A special class of polymeric structures is the family of the “metal-coordination polymers” which have attracted considerable interest as novel materials with unusual chemical and physical properties [8]. These metal-coordination polymers incorporating oligomeric clusters based on polyoxomolybdates are especially noteworthy [9–11] because of their special physical features due to the combination of molybdate anions with supplementary transition metal ions [12, 13]. Thus, one-dimensional molybdenum oxide chains could be easily bridged by including a metal-ligand subunit into a higherdimensional solid [14]. Such 3D frameworks of oxide chains and transition metal complexes are known in the literature [15–17]. Here we present a new