Octahedral molybdenum cluster complexes with aromatic sulfonate ligands.
This article describes the synthesis, structures and systematic study of the spectroscopic and redox properties of a series of octahedral molybdenum metal cluster complexes with aromatic sulfonate ligands (nBu4N)2[{Mo6X8}(OTs)6] and (nBu4N)2[{Mo6X8}(PhSO3)6] (where X-is Cl-, Br-or I-; OTs-is p-toluenesulfonate and PhSO3-is benzenesulfonate). All the complexes demonstrated photoluminescence in the red region and an ability to generate singlet oxygen. Notably, the highest quantum yields (>0.6) and narrowest emission bands were found for complexes with a {Mo6I8}4+cluster core. Moreover, cyclic voltammetric studies revealed that (nBu4N)2[{Mo6X8}(OTs)6] and (nBu4N)2[{Mo6X8}(PhSO3)6] confer enhanced stability towards electrochemical oxidation relative to corresponding starting complexes (nBu4N)2[{Mo6X8}X6].
Department of Chemistry, University of Hull, Cottingham Road, Hull, HU6 7RX, UK. o.efremova@hull.ac.uk.
Olga A
OA
Efremova
Yuri A
YA
Vorotnikov
Konstantin A
KA
Brylev
Natalya A
NA
Vorotnikova
Igor N
IN
Novozhilov
Natalia V
NV
Kuratieva
Mariya V
MV
Edeleva
David M
DM
Benoit
Noboru
N
Kitamura
Yuri V
YV
Mironov
Michael A
MA
Shestopalov
Andrew J
AJ
Sutherland