Discovered in 1937 by Robin Hill, Hill reagents allowed the discovery of electron transport chains during photosynthesis. These are dyes that act as artificial electron acceptors, changing color when they are reduced. An example of a Hill reagent is 2,6-dichlorophenolindophenol (

DCPIP 2,6-Dichlorophenolindophenol (DCPIP, DCIP or DPIP) is a chemical compound used as a redox dye. When oxidized, DCPIP is blue with a maximal absorption at 600 nm; when reduced, DCPIP is colorless. DCPIP can be used to measure the rate of p ...

References

* *{{cite journal , title = Discoveries in Oxygenic Photosynthesis (1727–2003): A Perspective , author = Govindjee and David Krogmann , journal = Photosynthesis Research , volume = 80 , issue = 1–3 , pages = 15–57 , year = 2004 , url = , doi = 10.1023/B:PRES.0000030443.63979.e6 , pmid = 16328809 Oxidizing agents Photosynthesis