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. Author manuscript; available in PMC: 2015 Jan 17.
Published in final edited form as: J Org Chem. 2013 Dec 20;79(2):759–768. doi: 10.1021/jo402680v

Figure 1.

Figure 1

A. Photolysis of the S,S-tetrazine phototrigger can be achieved with laser pulses at various wavelengths that afford two thiocyanates and molecular nitrogen in less than 50 ps. B. Schematic representation of the S,S-tetrazine phototriggering applied to a S,S-Tet-AKA. Photolysis of the S,S-tetrazine (shown in space filling representation) removes the structural constraint to furnish the bis-SCN photoproduct peptide. The 2D-IR measurements at various time delays following the photolysis pulse (Topt) directly monitor the conformational relaxation within the central CAC motif (the main chain of the peptide in the CAC region is shown in sticks).