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Spectroscopy of methylcyanodiacetylene revisited. Solid parahydrogen and solid neon matrix studies

Abstract : Electronic phosphorescence and infrared absorption spectra of methylcyanodiacetylene (CH3C5N) are revisited using matrix isolation in solid parahydrogen and neon. Band assignments previously found for Ar, Kr, Xe, and N2 low-temperature host media were updated, with certain ambiguous attributions being resolved. A combined analysis of both dispersed phosphorescence and phosphorescence excitation spectra observed in different environments provides a means to estimate the singlet-triplet separation for the gas-phase and pure solid compound, where phosphorescence could not be observed.
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U. Szczepaniak, A. Gutiérrez-Quintanilla, Claudine Crépin, J.-C. Guillemin, M. Turowski, et al.. Spectroscopy of methylcyanodiacetylene revisited. Solid parahydrogen and solid neon matrix studies. Journal of Molecular Structure, Elsevier, 2020, 1218, pp.128437. ⟨10.1016/j.molstruc.2020.128437⟩. ⟨hal-02864476⟩

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