Journal
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
Volume 11, Issue 3, Pages 578-586Publisher
SPRINGERNATURE
DOI: 10.1039/c2pp05360h
Keywords
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Funding
- Universite de Strasbourg
- CNRS
- France-Berkeley Fund
- ANR [09-BLAN-0425-01, PCV 07 1-0035]
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Different photoremovable protecting groups in the o-nitrobenzyl, phenacyl, and 2-(o-nitrophenyl)propyl series with a donor-acceptor biphenyl backbone, known to display excellent two-photon absorption cross-sections, were investigated in order to develop efficient two-photon sensitive photoremovable protecting groups. The 2-(o-nitrophenyl)propyl series was a more versatile platform to increase the two-photon sensitivity of photoremovable protecting groups, leading to the p-alkoxy and p-bisalkylamino-4-nitro-[1,1'-biphenyl]-3-yl)propyl derivatives: PENB and EANBP respectively. Those two photoremovable protecting groups are to date the best caging groups for two-photon excitation at 800 and 740 nm respectively, offering attracting perspectives in chemical biology.
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