1999
DOI: 10.1021/jp992115z
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Van der Waals Complexes of Tropolone with Carbon Dioxide

Abstract: van der Waals complexes of tropolone (TRN) with carbon dioxide have been synthesized by expanding mixtures of TRN and CO2 in He in a supersonic free-jet expansion, and have been examined by laser-induced fluorescence excitation spectroscopy and by ab initio structural calculations. At higher partial pressures of CO2 large clusters of TRN(CO2) n are formed in which TRN excited to S1 remains fluorescent. At sufficiently low partial pressures of CO2, well-resolved blue-shifted features in the spectra due to TRN(… Show more

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Cited by 10 publications
(4 citation statements)
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“…Tropolone, with its beautiful proton tunnelling doublet fluorescence excitation spectrum (Fig. 3) 10 obtained by another fabulous graduate student, Valerie MacKenzie, was added to our repertoire together with azulene and its derivatives and many thiones. We proceeded, more or less unencumbered by considerations of commercial applicability of our results.…”
Section: Introductionmentioning
confidence: 99%
“…Tropolone, with its beautiful proton tunnelling doublet fluorescence excitation spectrum (Fig. 3) 10 obtained by another fabulous graduate student, Valerie MacKenzie, was added to our repertoire together with azulene and its derivatives and many thiones. We proceeded, more or less unencumbered by considerations of commercial applicability of our results.…”
Section: Introductionmentioning
confidence: 99%
“…In contrast to van der Waals systems, laser-induced fluorescence spectra recorded for hydrogen-bonding adducts (e.g., M being H 2 O [12,13], CH 3 OH [13], or CO 2 [14,15]) exhibit amplified intensities (attributed to suppressed radiationless relaxation channels [16]) and are blue-shifted ( 0 4 0) significantly by amounts correlated to the binding energy and proton affinity of the addend [15]. For all such complexes examined to date, the absence of discernable tunneling bifurcation (D 0 % 0) has afforded clear evidence for disruption of hydron dynamics.…”
Section: Introductionmentioning
confidence: 99%
“…Thus, our group and Steer's group investigated the effects of intermolecular interaction on proton tunneling by synthesizing hydrogen-bonded and van der Waals ͑vdW͒ bonded complexes containing TRN or 9HPO as a chromophore in a supersonic jet. [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] The attachment of an atom or a molecule to TRN or 9HPO gives additional intermolecular coordinates. The influence of intermolecular interaction on proton tunneling in well-defined coordinates could be investigated by measuring the change in the ⌬ 0 Ј -⌬ 0 Љ value from the chromophore, which provides insights into proton tunneling in the condensed phase from microscopic point of view.…”
Section: Introductionmentioning
confidence: 99%