| Autor: |
Ugandhar U; School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India., Navaneetha T; School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India., Ali J; School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India., Mondal S; Advanced Centre of Research in High Energy Materials(ACRHEM), University of Hyderabad, Hyderabad 500046, Telangana, India., Vaitheeswaran G; School of Physics, University of Hyderabad, Hyderabad 500046, Telangana, India., Baskar V; School of Chemistry, University of Hyderabad, Hyderabad 500046, Telangana, India. |
| Abstrakt: |
Isolation and structural characterization of novel organoantimony(V)-based oxo clusters are reported. (RSb) 4 (OH) 4 ( t -BuPO 3 ) 6 and (RSb) 2 (O)( t -BuPO 3 H) 6 independently in the presence of pyridine under solvothermal conditions afford the hexanuclear organoantimonate clusters [(RSb) 6 (μ 3 -O) 2 (μ 2 -O) 6 ( t -BuPO 3 ) 4 ], where R = p - i -PrC 6 H 4 ( 1 ), p -ClC 6 H 4 ( 2 ). Further, reaction of organostibonate phosphonate with Ti(O i Pr) 4 in the presence of pyridine under solvothermal conditions afforded the mixed-metal titanium stibonate hexanuclear clusters [(RSb) 2 Ti 4 (μ 3 -O) 2 (μ 2 -O) 2 ( t -BuPO 3 ) 4 (μ-OCH 3 ) 4 (OCH 3 ) 4 ], where R = p - i -PrC 6 H 4 ( 3 ), p -ClC 6 H 4 ( 4 ). Band gap measurements were performed on 1 - 4 . They reveal a remarkable reduction in the band gap on moving from the heavier main-group-based oxo cages ( 1 and 2 ) to the titanium-incorporated oxo cages ( 3 and 4 ). |
