Loading...
2 results
Search Results
Now showing 1 - 2 of 2
- Supramolecular photochemistry of encapsulated caged ortho-nitrobenzyl triggersPublication . Kamatham, Nareshbabu; Raj, A. Mohan; Givens, Richard S.; Da Silva, José Paulo; Ramamurthy, V.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 unaddressed 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.
- Melding caged compounds with supramolecular containers: photogeneration and miscreant behavior of the coumarylmethyl carbocationPublication . Kamatham, Nareshbabu; Da Silva, José Paulo; Givens, Richard S.; Ramamurthy, V.By merging well-established concepts of supramolecular chemistry, protecting group strategy, and photochemistry, we have solubilized in water hydrophobic organic molecules consisting of a photoactive protecting group and masked carboxylic acids, released the desired acid, and confined a reactive carbocation intermediate within a capsule. Confinement of the photogenerated carbo cation brought out the latent radical-like behavior. This observation is consistent with the recent theoretical prediction of the 7-(diethylamino)coumarinyl-4-methyl carbocation having a triplet diradical ground-state electronic contribution.