Polyaminocarboxylates probes

Ala-Kleme and collaborators have probed the ability of six heptadentate, one octadentate, and three nonadentate polyaminocarboxylates to sensitize Ybm emission by an electrochemically generated process (fig. 62). In these experiments, peroxidisulfate is added to the chelate solutions and electric pulses generate hydrated electrons (E° = -2.9 V vs SHE) which trigger the following reactions ... 

Another point stemming out of Table 4.1 is that, ideally, the delay and acquisition times should be adapted to the decay time of the luminescent probe. This is not quite easy with chopper-fitted microscopes since the delay and acquisition times not only depend on the rotation speed of the chopper but, also, on the number of blades. Optimum working conditions would therefore require changing the chopper wheel, depending on the luminescent stain, which is not very practical. Microscopes are therefore usually fitted with chopper wheels adequate for one class of LLBs (e.g. lanthanide polyaminocarboxylates, with lifetimes around 600-700 ps). There are other ways of continuously modifying the time delay, but they also have their drawbacks (see below). 

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