A photoconjugation strategy based on light-triggered Diels–Alder addition of o-quinodimethanes is compatible with biomolecules and proceeds rapidly at ambient temperature without the need of a catalyst. Spatial control was confirmed by photopatterning of a small-molecule ATRP initiator, a polymer, and a peptide in a time-of-flight secondary-ion mass spectrometry investigation.
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Pauloehrl et al. (2011) studied this question.
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