Synthesis and characterization of a metal-to-polyoxometalate charge transfer molecular chromophore.

Authors :: Zhao C
Huang Z
Rodríguez-Córdoba W
Kambara CS
O'Halloran KP
Hardcastle KI
Musaev DG
Lian T
Hill CL
Source :: Journal of the American Chemical Society [J Am Chem Soc] 2011 Dec 21; Vol. 133 (50), pp. 20134-7. Date of Electronic Publication: 2011 Nov 23.
Publication Year :: 2011
Abstract: [P(4)W(35)O(124){Re(CO)(3)}(2)](16-) (1), a Wells-Dawson [α(2)-P(2)W(17)O(61)](10-) polyoxometalate (POM)-supported [Re(CO)(3)](+) complex containing covalent W(VI)-O-Re(I) bonds has been synthesized and characterized by several methods, including X-ray crystallography. This complex shows a high visible absorptivity (ε(470 nm) = 4000 M(-1) cm(-1) in water) due to the formation of a Re(I)-to-POM charge transfer (MPCT) band. The complex was investigated by computational modeling and transient absorption measurements in the visible and mid-IR regions. Optical excitation of the MPCT transition results in instantaneous (<50 fs) electron transfer from the Re(I) center to the POM ligand.<br /> (© 2011 American Chemical Society)

Full Text Access

Tools