Laser spectroscopy of open-shell sandwich complexes

Perutz, Robin N.; Hill, Jeremy N.; McCamley, Andrew

doi:10.1016/0010-8545(91)84015-w

Cited by 5 publications

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“…The excitation profiles show that the selectivity in excitation of the four component progressions displayed in Figure is repeated in each vibrational level . If the four separate excitation spectra are added together, then the resulting spectrum bears a close resemblance to the visible absorption spectrum (see Figure of ref ).…”

Section: Resultsmentioning

confidence: 99%

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Laser-Induced Fluorescence of Decamethylrhenocene in Low-Temperature Matrices

1996

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The emission and excitation spectra of decamethylrhenocene, Re(η 5 -C 5 Me 5 ) 2 have been recorded in argon and in nitrogen matrices with a tunable pulsed laser as exciting source. In argon matrices two sets of spectra may be excited selectively corresponding to different trapping sites or conformers of the guest molecules. Each set is dominated by a progression in ν 8 , a vibration corresponding to the in-phase combination of ringmetal-ring and ring-methyl bending modes (ν 8 ′ ) 392 (2) cm -1 ν 8 ′′ ) 383 (1) cm -1 ). Much weaker features can be detected corresponding to progressions involving the three other totally symmetric modes (ν x + nν 8 , x ) 6, 7, 9, n ) 0, 1, 2, ...). The emission and excitation bands in the principal site are symmetrical in shape with full width at half-maximum of only ca. 6 cm -1 . The spectra of Re(η 5 -C 5 Me 5 ) 2 in nitrogen matrices are similar to those in argon matrices, but differ in site/conformer structure. The excited state lifetime in nitrogen matrices has been determined by single photon counting methods to be 3.69 (7) ns. The quantum yield for emission in nitrogen matrices is estimated as 0.010.

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Section: Resultsmentioning

confidence: 99%

“…Since the lifetime proved to be shorter than the laser pulse used for spectral measurements, single photon counting (SPC) methods were employed , …”

Section: Introductionmentioning

confidence: 99%