Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 34, Pages 13915-13917Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja306052u
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Funding
- EPSRC
- DFG
- Fonds der Chemischen Industrie (Liebig Fellowship)
- Int. Max Planck Research School in Chem. Biology
- RD-IFSC (Ruhr-Univ. Bochum)
- EPSRC [EP/H002421/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H002421/1] Funding Source: researchfish
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A series of selectively deuterated praseodymium cryptates has been synthesized. Their luminescence lifetimes in solution range from 150 to 595 ns for the D-1(2) -> F-3(4) transition. Global fitting of the nonradiative deactivation rate differences of the isotopologic C-(H/D) oscillators revealed that aromatic C-D overtones anomalously quench the luminescence more than C-H vibrations. This is explained by the dominance of Franck-Condon overlap factors that greatly favor C-D oscillators, which are in almost ideal resonance with the relevant energy gap D-1(2)-(1)G(4) of praseodymium.
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