Conférence Equipe S
Dr Serhii Radio
Vasyl' Stus Donetsk National University (in exile in Vinnytsia), Ukraine
Polyoxotungstates: Routes for Synthesis and Crystal Structures
Mardi 23 octobre 2018 à 14 h Auditorium Fernand Gallais
Campus CNRS 205
205, route de Narbonne, Toulouse
Contacts LCC: Jean-Pacal Sutter, jean-pascal.sutter@lcc-toulouse.fr
Retrouvez le programme complet des séminaires sur le site web du LCC : http://www.lcc-toulouse.fr/
Dr. Serhii Radio, Associate Professor,
Head of the Department for Research, Vasyl' Stus Donetsk National University (in exile in Vinnytsia), UKRAINE
«Polyoxotungstates: Routes for Synthesis and Crystal Structures»
Polyoxometalates (POMs) are considered nowadays as one of the most growing fields of research. The present talk is devoted to the recent results in studying processes of polyoxometalate anions formation in an acidified aqueous and aqueous-organic solutions, and in the synthesis of pure inorganic isopoly tungstates of double-charged metal cations (Ca, Sr, Ba, Pb, Co, Ni), and heteropoly tungstates with Anderson and Peacock–Weakley types of anion. pH-potentiometric investigation of the state of polyoxometalate anions in aqueous solutions of M2WO4 – H+ – KNO3 – H2O/Solvent (M = Na, K; Solvent = dimethylformamide, dimethyl sulfoxide), Ln3+ – WO42– – H+ – H2O (Ln = lanthanide, Y), Ni2+ – WO42– – H+ – H2O, and mathematical modeling of equilibria processes in these systems will be discuss. The synthetic routes for successful salts syntheses with paratungstate B ([W12O40(OH)2]10–), decatunstate ([W10O32]4–), Anderson ([Ni(OH)6W6O18]4–), and Peacock–
Weakley ([Ln(W5O18)]9–) types of structures will be propose.
Na4[Ni(OH)6M6O18]∙16H2O (M=Mo, W)
[Ba(H2O)2(C3H7NO)3]2-
[W10O32]∙(C3H7NO)2
Na9[Ln(W5O18)2]·35H2O
