1357193-96-4Relevant articles and documents
Furan- and selenophene-2-carboxylato derivatives of dimolybdenum and ditungsten (M≡M): A comparison of their chemical and photophysical properties
Brown-Xu, Samantha E.,Chisholm, Malcolm H.,Gallucci, Judith C.,Ghosh, Yagnaseni,Gustafson, Terry L.,Reed, Carly R.
, p. 2257 - 2263 (2012/03/22)
From the reactions between M2(TiPB)4, where TiPB = 2,4,6-triisopropylbenzoate and two equivalents each of 2-furan carboxylic acid, FuCO2H, and 2-selenophene carboxylic acid, SpCO2H in toluene, the new compounds trans-M2(T iPB)2(O2CFu)2 (1a M = Mo, 2a M = W) and trans-M2(TiPB)2(O2CSp) 2 (1b M = Mo, 2b M = W) were formed. These new compounds have been characterized by 1H NMR, steady-state UV-Vis-NIR absorption and emission spectroscopy, cyclic and differential pulse voltammetry, and fs and ns transient absorption spectroscopy. The compound Mo2(T iPB)2(O2CSp)2 (1b) has been characterized by single crystal X-ray crystallography. These data are compared with those previously reported for related 2-thiophene carboxylate derivatives: M2(TiPB)2(O2CTh)2. The physico-chemical data correlate well with electronic structure calculations performed on model compounds. All compounds have detectible S1 photoexcited states with lifetimes that vary from ～5 ps to 1 states with microsecond lifetimes that are assigned as MMδδ* whereas the T1 states for tungsten are 3MLCT with lifetimes on the order of nanoseconds. In all cases, shorter lifetimes were seen in complexes containing heavier atoms. The Royal Society of Chemistry 2012.
