Synthesis and characterization of tetraprolinium silicotungstic acid tetra‐hydrate, a new organic‐inorganic hybrid based on polyoxometallates

Abstract

A new solvated polyoxometallate bearing an amino acid, (I), has been prepared for the first time by the reaction of 0.16 mmol α-H 4 SiW 12 O 40 .15H 2 O with 0.78 mmol of L-proline in hydrochloric acid at pH 3. The structure of (I) was substantially characterized by some physical approaches, such as elemental analysis, infrared spectroscopy, and 1 H-NMR. Our findings proved that (I) could be formulated as [L-It is believed that the electrostatic attractions and hydrogen bonding between tungstosilisic acid and the prolinium cation affected the structure of (I). It is evident that the polyoxometallates moieties were arranged in good order to form large holes in the structural backbone. These cavities were occupied by the prolinium cations and water molecules.

Self-Assembly Hydrothermal Synthesis of Silverton-Type Polyoxometalate-Based Photocatalysts for Enhanced Degradation

“…Up till now, various synthetic methods have been developed to prepare POMs, including aqueous solution synthesis, , one-pot method, hydrothermal synthesis, ionic-liquids-mediated synthesis, flow reaction system, photochemical synthesis, microwave-assisted synthesis, and evaporation . However, compared with traditional semiconductors (such as TiO 2 and ZnO), POMs present a high water solubility that makes recovery of the photocatalyst difficult. − To overcome this shortcoming, many researchers have focused on preparing insolvable powders of the POMs.…”

Two Novel Chiral Inorganic–Organic Hybrid Materials Containing Preyssler and Wells–Dawson Heteropolyoxometallates with Valine (val), Glycine (gly), and Proline (pro) Amino acids: (Hval)2(Hgly)(H3O)6K5[Na(H2O)P5W30O110]·19.5H2O and (Hpro)6[P2W18O62]·8H2O

“…So, in the present study and in continuation of our previous reports [5,[8][9][10][11][12][13][14], we describe the syntheses, and X-ray crystal structures of two chiral organic-inorganic hybrid materials based on Preyssler and Wells-Dawson-types POMs including monoprotonated valine, glycine, and proline amino acids.…”

“…This spatial orientation is indicated by the torsion angles: Hpro ? ions are excellent hydrogen-bond donors and at the same time provide countercharges [5,9]. The hydrogen bonds between Hpro ?…”

“…The organic-inorganic hybrid materials have generated much interest in the field of synthetically specialized materials. They exhibit remarkable characteristics in their electrical, magnetic and optical properties [7][8][9][10][11][12][13][14]. These include compounds with Keggin-type POMs and radical cations, derived from electron rich molecules, like tetrathiafulvalene [15][16][17][18][19], decamethylferrocene [20] and porphyrins [21], as well as salt-like compounds with several types of cationic organic species.…”

Synthesis, X-ray crystallography characterization, vibrational spectroscopy, and DFT theoretical studies of a new organic–inorganic hybrid material

“…Research on a new type organic-inorganic molecular material based on polyoxometallates (POMs for short), which are applied in medicine, catalysis, energy storage, molecular electronics, and ceramics, is continuing to attract considerable interest [1][2][3][4][5][6][7][8]. Application of POMs as drugs against herpes and AIDS has intensified the interest in the association between POM species with bioorganic compounds [9][10][11][12].…”