Today's KNOWLEDGE Share : Two coloir photochemical process

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Today's KNOWLEDGE Share

Light is critical to a plethora of applications and processes that govern our everyday life. Mostly, these applications are enabled by making a material by using one colour of light, for example the dental fillings that many of us have - remember the little blue light that the dentist uses?



However, many more applications and processes become possible when using two colours of light at the same time. We have introduced a taxonomy of how to classify two-colour photochemical processes, which includes wavelength orthogonal, synergistic and cooperative modes https://lnkd.in/gEPnqbPR.


One of these modes is called antagonistic photochemistry. It is perhaps the quirkiest of them all, because in this mode one colour of light starts a photochemical reaction, but when a second colour of light is added, the entire photochemical reaction stops.


Quirky, because why not just switch the first colour of light off and you achieve the same effect? Because certain 3D printing processes that allow printing extremely small objects (small then the size of a human hair), require antagonistic two-colour reaction modes.


Today, we introduce such a two-colour antagonistic photochemical reaction system jointly with our close collaborator Prof. Jordi Campos at the Universitat Autรฒnoma de Barcelona in the journal Advanced Functional Materials https://lnkd.in/gaBFWJMa Wiley. Final year PhD student and lead author Arnaud Marco joined our KIT node laboratory in 2024 to conduct part of the study there with Dr. Florian Feist and Dr. Tugce Nur EREN.


source:Christopher Barner-Kowollik

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