Anomalous reversal of C-H and C-D quenching efficiencies in luminescent praseodymium cryptates.
Anomalous reversal of C-H and C-D quenching efficiencies in luminescent praseodymium cryptates.
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DOI：
10.1021/ja306052u
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发表时间：
2012-08
影响因子：
15
通讯作者：
J. Scholten;G. Rosser;Jessica Wahsner;Nicola Alzakhem;Caroline Bischof;Felix Stog;A. Beeby;Michael S
中科院分区：
文献类型：
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作者：
J. Scholten;G. Rosser;Jessica Wahsner;Nicola Alzakhem;Caroline Bischof;Felix Stog;A. Beeby;Michael S
合成了一系列选择性氘代镨穴合物。它们在溶液中（1）D（2）→（3）F（4）跃迁的发光寿命为150 ~ 595 ns。同位素C-（H/D）振子的非辐射失活速率差的全局拟合表明，芳香族C-D泛音比C-H振动更有害地淬灭发光。这可以通过Franck-Condon重叠因子的优势来解释，这些因子非常有利于C-D振荡器，这些振荡器与praseo_3的相关能隙（1）D（2）-（1）G（4）几乎理想地共振。
A series of selectively deuterated praseodymium cryptates has been synthesized. Their luminescence lifetimes in solution range from 150 to 595 ns for the (1)D(2) → (3)F(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 (1)D(2)-(1)G(4) of praseodymium.