Hill, Jeremy N., Perutz, Robin N. and Rooney, A. Denise (1995) Laser-Induced Fluorescence of Molybdenocene and Tungstenocene in Low-Temperature Matrices. Journal of Physical Chemistry A, 99. pp. 538-543. ISSN 1089-5639
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Abstract
The reactive metallocenes, tungstenocene and molybdenocene (M(t75-C5H5)2; M = Mo, W), have been generated
by photolysis of the corresponding dihydride complexes, M(í;5-C5H5)2H2, in argon and nitrogen matrices at
12 K. The metallocenes have been probed by laser-induced fluorescence with a pulsed tunable laser and by
UV/vis absorption spectroscopy. Structured emission is observed from the LMCT excited states (lifetimes
< 10 ns). The spectra are complicated by multiple sites/conformers, but emission spectra of a single site/
conformer may be obtained with appropriate selection of matrix and excitation wavelength. Corresponding
excitation spectra are measured from the area of selected emission peaks as a function of excitation wavelength.
Vibrational progressions are dominated by the ring—metal-ring symmetric stretching mode (v4 ~ 300 cm-1).
Nevertheless, this mode changes in frequency by <4 cm-1 (< 1.3%) in the LMCT excited state. The bestresolved
peaks have a full width at half-maximum of ca. 10 cm-1. Most of the emission is vibrationally fully
relaxed, but weak emission peaks arising from ' = 1 states are found for MoCp2 in N2 matrices.
Item Type: | Article |
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Additional Information: | Cite as: J. Phys. Chem. 1995, 99, 2, 538–543 |
Keywords: | Laser-Induced; Fluorescence; Molybdenocene; Tungstenocene; Low-Temperature; Matrices; |
Academic Unit: | Faculty of Science and Engineering > Chemistry |
Item ID: | 14521 |
Identification Number: | 10.1021/j100002a015 |
Depositing User: | Dr. Denise Rooney |
Date Deposited: | 09 Jun 2021 14:22 |
Journal or Publication Title: | Journal of Physical Chemistry A |
Publisher: | American Chemical Society |
Refereed: | Yes |
Related URLs: | |
URI: | https://mu.eprints-hosting.org/id/eprint/14521 |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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