Sequence-independent activation of photocycloadditions using two colours of light |
| |
| Authors: | Philipp W Kamm Leona L Rodrigues Sarah L Walden James P Blinco Andreas-Neil Unterreiner Christopher Barner-Kowollik |
| |
| Institution: | Centre for Materials Science, Queensland University of Technology (QUT), 2 George Street, Brisbane QLD 4000 Australia.; School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane QLD 4000 Australia ; Molecular Physical Chemistry Group, Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, Geb. 30.44, Karlsruhe 76131 Germany, |
| |
| Abstract: | We exploit two reactive chromophores to establish sequence-independent photochemical activation, employing ortho-methyl benzaldehyde (oMBA) and N,N-(dimethylamino)pyrene aryl tetrazole (APAT) with N-(2-hydroxy)ethyl maleimide (NHEM), without any additives. Critically, the order of the irradiation sequence is irrelevant, as the shorter wavelength does not activate the higher wavelength activated species. Therefore, full sequence-independent λ-orthogonality is achieved through differences in both the reaction quantum yields (Φr,oMBA and Φr,APAT) and wavelength-dependent reactivity profiles of the employed chromophores.We exploit two reactive chromophores to establish sequence-independent photochemical activation without any additives. |
| |
| Keywords: | |
|
|
