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• W2034821888 abstract "Resolved vibronic structure in electronic spectra provides a detailed view into how molecular structure changes after absorption or emission of a photon. We report temperature- and pressure-dependent luminescence spectra of trans-[ReO 2 (pyridine) 4 ]I. Low-temperature spectra reveal long vibronic progressions in the totally symmetric O=Re=O (907 cm –1 ) and Re-pyridine (211 cm –1 ) stretching modes, indicating large structural displacements along these normal coordinates. The luminescence band maximum is at ca. 15 500 cm –1 . Room-temperature spectra are somewhat less-resolved; however, intervals closely matching the O=Re=O frequency (~870 cm –1 ) persist at higher temperatures. The variable pressure spectra exhibit distinct changes in the vibronic patterns, and luminescence energies decrease by 16 ± 2 cm –1 /kbar (1 bar = 100 kPa). Low-temperature spectra are modeled using two-dimensional potential energy surfaces to represent the initial and final electronic states, from which the quantitative normal coordinate offsets can be determined. We then adapt this model to the room-temperature, pressure-dependent data where it is possible to determine how the offsets and other important spectroscopic parameters vary with the pressure-induced changes of the molecular structure. Key words: trans-[ReO 2 (pyridine) 4 ]I, low-temperature luminescence spectroscopy, high-pressure luminescence spectroscopy, vibronic structure, emitting state distortions." @default.
• W2034821888 created "2016-06-24" @default.
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• W2034821888 date "2004-06-01" @default.
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• W2034821888 title "Temperature- and pressure-dependent luminescence spectroscopy on the <i>trans</i>-[ReO₂(pyridine)₄]⁺ complex — Analysis of vibronic structure, luminescence energies, and bonding characteristics" @default.
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• W2034821888 doi "https://doi.org/10.1139/v04-031" @default.
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