Abstract
ortho-Nitrobenzyl (oNB) triggers have been extensively used to release various molecules of interest. However, the toxicity and reactivity of the spent chromophore, o-nitrosobenzaldehyde, remains an un-addressed difficulty. In this study we have applied the well-established supramolecular photochemical concepts to retain the spent trigger o-nitrosobenzaldehyde within the organic capsule after release of water-soluble acids and alcohols. The sequestering power of organic capsules for spent chromophores during photorelease from ortho-nitrobenzyl esters, ethers and alcohols is demonstrated with several examples.
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Electronic supplementary information (ESI) available: Experimental procedures, 1H NMR, UV and ESI-MS spectra for all new compounds. Irradiation procedures, 1H NMR titration spectra of host–guest complexes, progress of photoreactions as monitored by 1H NMR, LC-DAD-MS. See DOI: 10.1039/ c9pp00260j
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Kamatham, N., Raj, A.M., Givens, R.S. et al. Supramolecular photochemistry of encapsulated caged ortho-nitrobenzyl triggers†. Photochem Photobiol Sci 18, 2411–2420 (2019). https://doi.org/10.1039/c9pp00260j
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DOI: https://doi.org/10.1039/c9pp00260j