%0 Journal Article
%T The Novel Polymorphic Form of Bis(3,5,7-triaza-1-azoniatricyclo[ ]decane) bis( -oxo)-tris( -oxo)-nonakis( -oxo)-nonaaqua-decaoxo-hepta-molybdenum-di-zinc(II) dihydrate, Synthesis, and Properties
%A Rafal Kruszynski
%A Tomasz Sieranski
%A Bartlomiej Lewinski
%A Agata Trzesowska-Kruszynska
%A Ewelina Czubacka
%J International Journal of Inorganic Chemistry
%D 2012
%I Hindawi Publishing Corporation
%R 10.1155/2012/516832
%X The reaction of molybdophosphoric acid with zinc carbonate followed by addition of hmta leads to formation of a triclinic polymorph of bis(3,5,7-triaza-1-azoniatricyclo[ ]decane) bis( -oxo)-tris( -oxo)-nonakis( -oxo)-nonaaqua-decaoxo-hepta-molybdenum-di-zinc(II) dihydrate in a one pot simple reaction. The obtained compound has been characterised by IR, UV-Vis spectroscopy, elemental analysis, and X-ray crystallography. A detailed comparison between both polymorphic forms: triclinic £¿£¿, £¿£¿, £¿£¿, , , , and £¿£¿3 and monoclinic £¿£¿, £¿£¿, £¿£¿, , , , and £¿£¿3 was performed. The influence of the synthesis procedure on polymorph formation was described. 1. Introduction The coordination chemistry of zinc is a field of growing interest from various viewpoints. The attention of scientists concentrates on synthetic aspects, structural, physicochemical properties, and reactivity of zinc compounds, as well as on their potential applications such as the development of catalysts (C¨CC bond formation reactions [1], carbon dioxide activation [2¨C4], etc.). Zinc complexes compounds are widely studied as biological mimics [5¨C7]. Zinc is an essential element for humans and is homeostatically regulated in the body. It has an important role in protein synthesis, and it is also a cofactor for many enzymes regulating cell growth and hormone levels, including regulation of gene transcription and growth factor metabolism [8]. Moreover, the mean zinc and lead concentrations in the human body correlate with the degree of urbanization and industrialization [9, 10]. Transition metal oxides such as molybdenum oxides are used in many industrial applications and have gained an interest from both technological and scientific points of view [11¨C15]. The main fields of industrial applications are catalysis, sorption, energy storage, molecular electronics, optical materials, and ceramics [16, 17]. Molybdenum oxides are an interesting example of this group of compounds and have a great industrial interest due to their optical and electronic properties. In fact, these transition metal oxides can be switched between two different optical states by photochromic, thermochromic, or electrochromic means [13]. Compounds that contain molybdenum oxides substructures modified by organonitrogen ligands were classified as a fifth class of oxides in which organic materials play a significant structural role [18]. Taking the above into consideration, there is a need for synthesis and investigations of new molybdenum cluster compounds. These compounds, containing additionally zinc cations, may possess interesting
%U http://www.hindawi.com/journals/ijic/2012/516832/