Binuclear Sulfide Niobium Clusters Coordinated by Diimine Ligands: Synthesis, Structure, Photocatalytic Activity and Optical Limiting Properties. - Rogachev, Alexander V.; Gushchin, Artem L.; Abramov, Pavel A.; Kozlova, Ekaterina A.; Vicent, Cristian; Piryazev, Dmitry; Barlow, Adam; Samoc, Marek; Humphrey, Mark G.; Llusar, Rosa; Fedin, Vladimir P.; Sokolov, Maxim N. (European Journal of Inorganic Chemistry, 2015)