Quadruply bonded dimetal units supported by 2,4,6-triisopropylbenzoates MM(TiPB) 4 (MM = Mo 2, MoW, and W 2): Preparation and photophysical properties

Brian G. Alberding, Malcolm H. Chisholm, Yi Hsuan Chou, Judith C. Gallucci, Yagnaseni Ghosh, Terry L. Gustafson, Nathan J. Patmore, Carly R. Reed, Claudia Turro

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The preparation and characterization (elemental analysis, 1H NMR, and cyclic voltammetry) of the new compounds MM(TiPB) 4, where MM = MoW and W 2 and TIPB = 2,4,6-trilsopropylbenzoate, are reported. Together with Mo 2(TiPB) 4, previously reported by Cotton et al. {Inorg. Chem. 2002, 41, 1639), the new compounds have been studied by electronic absorption, steady-state emission, and transient absorption spectroscopy (femtosecond and nanosecond). The compounds show strong absorptions In the visible region of the spectrum that are assigned to MMo to arylcarboxylate π* transitions, 1MLCT. Each compound also shows luminescence from two excited states, assigned as the 1MLCT and 3MMδδ* states. The energy of the emission from the 1MLCT state follows the energy ordering MM = Mo 2 > MoW > W 2, but the emission from the 3MMδδ* state follows the Inverse order: MM = W 2 > MoW > Mo 2. Evidence Is presented to support the view that the lower energy emission in each case arises from the 3MMδδ* state. Lifetimes of the 1MLCT states in these systems are ∼0.4-6 ps, whereas phosphorescence is dependent on the MM center: Mo 2 ∼ 40 fis, MoW ∼ 30 μs, and W 2 ∼ 1 μs.

Original languageEnglish
Pages (from-to)4394-4399
Number of pages6
JournalInorganic Chemistry
Volume48
Issue number10
Early online date20 Apr 2009
DOIs
Publication statusPublished - 18 May 2009
Externally publishedYes

    Fingerprint

Cite this

Alberding, B. G., Chisholm, M. H., Chou, Y. H., Gallucci, J. C., Ghosh, Y., Gustafson, T. L., ... Turro, C. (2009). Quadruply bonded dimetal units supported by 2,4,6-triisopropylbenzoates MM(TiPB) 4 (MM = Mo 2, MoW, and W 2): Preparation and photophysical properties. Inorganic Chemistry, 48(10), 4394-4399. https://doi.org/10.1021/ic900092c