PHRD AND RAMAN SPECTROSCOPY ANALYSIS OF THE ZN (II) COORDINATION POLYMER BASED ON 1,2,4,5-CYCLOHEXANTETRACARBOXYLATE

In the reliable description of the structure of coordination polymers, it is important to jointly evaluate the long-range order and local metal-ligand bonds in the crystal lattice. Powder X-ray diffraction (PXRD) provides information on the crystallinity level, diffraction reflections, and spatial ordering of the sample, while Raman spectroscopy allows for the determination of vibrations associated with carboxylate groups, the organic skeleton, and metal-oxygen bonds of the ligand [1-2]. 1,2,4,5-cyclohexane tetracarboxylate is a multi-donor and conformationally flexible ligand that can bind to Zn (II) ions in various coordination modes to form ordered coordination structures [3- 4]. Therefore, in this work, the crystalline properties of the Zn (II) coordination polymer based on 1,2,4,5-cyclohexane tetracarboxylate were studied using PCRD, and the state of local bonding was studied using Raman spectroscopy, and the results were analyzed structurally in relation to each other [5]