Abstract: Polyoxometalates (hereafter, POMs) are attractive molecules and have been more focus of attention due to their special structure and interesting properties. POMs have been applied in many fields such as catalysis, medicine (anti viral, anti bacterial), theoretical studies and material science [1-4]. . POMs can function as molecular acceptors, and they form novel molecular assemblies with a number of organic donors containing N, S, O atoms, i.e., amino acids, quinolines, TTF and crown ethers [5-6]. These compounds form, and are stable, at room temperature. In fact, they may be formed by kinds of hydrogen-bonding interactions. This research describes for the first time the synthesis and properties of a new valine-polyoxomolybdate compound and has been characterized by IR and 1H-NMR spectra. The characteristic peaks of IR spectrum of this compound are as below: 794 cm-1 (Mo-Oc-Mo), 876 cm-1(Mo-Ob-Mo), 867 cm-1(Mo-Od), 1062 cm-1 (P-Oa) show that [PMo12O40]-3 retains its Keggin structure. The peaks at 1240-1716 cm-1 and 3452 cm-1 are assigned to C5H11NO2+1 and water molecules, respectively. Obtained results from 1H-NMR are consistence with infrared spectroscopy and indicating that the valiniums cations are in the crystalline structure.

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