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- W2060565229 abstract "The frequency of the 7F0→5D0 transition of Eu3+ is found to correlate with the sum of derived nephelauxetic parameters of the ligating atoms in Eu3+ complexes. Parameters for nine distinct coordinating atom types are obtained via a multiple linear regression method applied to experimental 7F0→5D0 transition frequencies of twenty-seven 9-coordinate Eu3+ complexes with known ligand constituents. The linear correlation coefficient is 0.99. Addition of data from 7-, 8-, 10-, and 11-coordinate complexes and use of a multiplicative constant, characteristic of each coordination number, produces a second linear correlation covering thirty-seven systems with a correlation coefficient of 0.98. The present approach seeks to understand the factors which influence the 7F0→5D0 transition frequency and to make predictions of this quantity for particular ligand environments. It is completely empirical in nature; however, the results may be understood in terms of an underlying theoretical cause. The parameters obtained here correlate roughly with the nephelauxetic h-values of Jørgensen for the few cases where appropriate ligand matches are available. The 7F0→5D0 term separation will decrease from its free-ion value of 17 374 cm−1 with increasing Eu3+ -ligand covalency, and the presently derived parameters are consistent with this idea. The correlation presented here is clearly superior to our earlier attempt to identify a relationship between the 7F0→5D0 transition frequency and the total formal charge on the ligands in a complex." @default.
- W2060565229 created "2016-06-24" @default.
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- W2060565229 date "1995-02-01" @default.
- W2060565229 modified "2023-10-16" @default.
- W2060565229 title "On correlating the frequency of the 7F0 → 5D0 transition in Eu3+ complexes with the sum of ‘nephelauxetic parameters’ for all of the coordinating atoms" @default.
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- W2060565229 doi "https://doi.org/10.1016/0020-1693(94)04269-2" @default.
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