The polymer will continue to replicate until a quenching agent is presented.
2.
The Stern Volmer experiment measures the intensity of phosphorescence while varying the concentration of each possible quenching agent.
3.
Therefore, these terminal anions will stay on the ends of the polymer until a quenching agent is introduced.
4.
This will continue until the metal catalyst at the end of the chain is intentionally removed by the addition of a quenching agent.
5.
When the concentration of the actual quenching agent is varied, the rate of electron transfer and the degree of phosphorescence is affected.
6.
An exception is the class of living polymerizations, in which propagation is much " slower " than initiation, and chain termination does not occur until a quenching agent is added.
7.
In green plants, xanthophylls act to modulate light energy and serve as non-photochemical quenching agents to deal with triplet chlorophyll ( an excited form of chlorophyll ), which is overproduced at very high light levels, during photosynthesis.
8.
Thus, if the excited-state lifetime of the photoredox catalyst is known from other experiments, the rate constant of quenching in the presence of a single reaction component can be determined by measuring the change in emission intensity as the concentration of quenching agent changes.
9.
Here, I 0 and I denote the emission intensity with and without quenching agent present, k q the rate constant of the quenching process, ? 0 the excited-state lifetime in the absence of quenching agent and [ Q ] the concentration of quenching agent.
10.
Here, I 0 and I denote the emission intensity with and without quenching agent present, k q the rate constant of the quenching process, ? 0 the excited-state lifetime in the absence of quenching agent and [ Q ] the concentration of quenching agent.
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