Neodymium thermal properties

Studies on the thermal properties of lanthanum, cerium, neodymium, and gadolinium hexaborides in the cryogenic region from 5° to 350°K. 193) have shown the presence of two types of anomalies in the latter three substances. At temperatures near 10 °K. there appears a lambda-type anomaly in each which is rather characteristic of a magnetic transformation. At slightly higher temperatures this is followed by Schottky-... 

The photophysical properties of 20 are particularly interesting, in that the triplet energy of the porphyrin chromophore is comparable to the emissive state of and can be thermally repopulated at room temperature [52], This leads to a dependence of the emission intensity and lifetimes upon the degree of sample aeration. In most cases, energy transfer from the chromophore to the lanthanide occurs via the MLCT state of the chromophore, and normal behaviour is observed. However, the broad nature of the emission from luminescent MLCT states means that the tail of this emission is often superimposed upon the relatively weak luminescence from the lanthanide ion. In such situations the two signals can be resolved readily provided that their lifetimes differ significantly. This is not the case with many complexes related to [Rulbpyls] ", which have luminescence lifetimes comparable with those of neodymium and ytterbium complexes. 

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