’’Free’’ O–H overtone absorption of methanols in the visible region by thermal lensing spectroscopy

Swofford, Robert L.; Long, Min; Burberry, M. S.; Albrecht, A. C.

doi:10.1063/1.433940

Cited by 72 publications

(20 citation statements)

References 13 publications

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“…OH oscillators appear slightly more effective as energy acceptors than CH oscillators for the complexes under study.Again, this is acombined effect of the higher vibrational energy (ñ OH % 3400 cm À1 vs.ñ CH % 2900 cm À1 )a nd anharmonicity (x OH % 90 cm À1 vs.x CH % 60 cm À1 ) [30,32] of the OH oscillators. OH oscillators appear slightly more effective as energy acceptors than CH oscillators for the complexes under study.Again, this is acombined effect of the higher vibrational energy (ñ OH % 3400 cm À1 vs.ñ CH % 2900 cm À1 )a nd anharmonicity (x OH % 90 cm À1 vs.x CH % 60 cm À1 ) [30,32] of the OH oscillators.…”

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confidence: 99%

Deuterated Molecular Ruby with Record Luminescence Quantum Yield

et al. 2018

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The recently reported luminescent chromium(III) complex 1 ([Cr(ddpd) ] ; ddpd=N,N'-dimethyl-N,N'-dipyridine-2-yl-pyridine-2,6-diamine) shows exceptionally strong near-IR emission at 775 nm in water under ambient conditions (Φ=11 %) with a microsecond lifetime as the ligand design in 1 effectively eliminates non-radiative decay pathways, such as photosubstitution, back-intersystem crossing, and trigonal twists. In the absence of energy acceptors, such as dioxygen, the remaining decay pathways are energy transfer to high energy solvent and ligand oscillators, namely OH and CH stretching vibrations. Selective deuteration of the solvents and the ddpd ligands probes the efficiency of these oscillators in the excited state deactivation. Addressing these energy-transfer pathways in the first and second coordination sphere furnishes a record 30 % quantum yield and a 2.3 millisecond lifetime for a metal complex with an earth-abundant metal ion in solution at room temperature.

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confidence: 99%

Deuterated Molecular Ruby with Record Luminescence Quantum Yield

et al. 2018

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“…[2], p. 1472). by the thermal lensing spectroscopy [5]. Very characteristic asymmetry of the absorption profiles for CH stretch and the local mode character of these vibrations are clearly visible.…”

Section: Practical Considerationsmentioning

confidence: 82%

“…Thermal lensing absorption spectrum of benzene-d5 (from Ref. [5], Fig. 2 with the permission of the authors).…”

Section: Practical Considerationsmentioning

confidence: 99%

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Infrared Spectra of Retarded Molecular Oscillator

1997

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Theoretical interpretation is proposed for the inhomogeneous broadening of the infrared line shapes of high harmonics of hydrogen containing modes observed by the optoacoustic and thermal lensing spectroscopy in the liquid phase of benzene and other organic transparent liquids. Attention is focused on the experimental fact that both line width and asymmetry factors of the harmonic series increase linearly with the harmonic number for which fact no satisfactory theoretical understanding was still available. This interpretation is based on recently proposed new approach to separation of electronic and nuclear movements accounting for the finite velocity of the π e l e c t r o n i c c l o u d o f v i c i n a l m o l e c u l e s a n d i t s r e t a r d a t i o n i n f o l l o w i n g t h e protonic motion. This retardation leads to the time dependence of molecular oscillator which may be viewed as anharmonic. The experimental results concerning the linear increase in the line width and the asymmetry factor with increasing order of the harmonic are well represented.

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“…They recorded the visible spectrum of benzene, naphthalene, and anthracene between 15700 and 17400 cm À1 . In following publications, they expanded the application to a variety of samples, including normal, branched and cycloalkanes [17], deuterated benzenes [18], methanols [19], and methane halides [20]. Prasad and Rai [21] have obtained visible spectra of alcohols and cyanides; they calculated vibrational frequencies and anharmonicities for both C-H and O-H stretching vibrations.…”

Section: Introductionmentioning

confidence: 97%