Synthesis, Structure, and Magnetic Properties of Amine‐Templated Transition‐Metal Phosphites

Autor: Padmini Ramaswamy, Srinivasan Natarajan, Nayana N. Hegde, Ramanath Prabhu, Sukhendu Mandal, Debmalya Banerjee, S. V. Bhat
Rok vydání: 2010
Předmět:
Zdroj: European Journal of Inorganic Chemistry. 2010:1829-1838
ISSN: 1099-0682
1434-1948
DOI: 10.1002/ejic.200901206
Popis: Transition-metal phosphites of cobalt and vanadium, [C 4 N 2 H 12 [Co(HPO 3 ) 2 ] (I), [C 4 N 2 H 14 ][Co(HPO 3 ) 2 ] (II), [Co-(C 10 H 8 N 2 )(H 2P O 3 ) 2 ] (III), [C 4 N 2 H1 4 ][V III F(HPO 3 ) 2 ]-H 2 O (IV), and [C 3 N 2 H 5 ] 2 [Y 4 III (H 2 O) 3 (HPO 3 ) 4 (HPO 4 ) 3 ] (V), have been synthesized and characterized. Organophosphorus esters were employed to stabilize cobalt in tetrahedral coordination and also to prepare the low-dimensional structures, which are otherwise difficult to synthesize. The structures have one- (I, II, IV), two- (III) and three-dimensionally (V) extended networks built up by the linking of metal polyhedra and phosphite units. Another vanadyl phosphite, [C 2 N 2 H 10 ][(V IV O) 3 (H 2 O)(HPO 3 ) 4 ]·H 2 O, [15] was also prepared and investigated extensively by ESR, magnetic susceptibility, and other studies. All the compounds in the present study exhibit antiferromagnetic interactions. Well-established magnetic models have been used to fit the experimental data. The compounds have also been characterized in detail by using UV/Vis spectroscopic studies.
Databáze: OpenAIRE
Externí odkaz: