Quinoline‐Derived Two‐Photon Sensitive Quadrupolar Probes. Issue 8 (3rd January 2017)

• Record Type: Journal Article
• Authors: Tran, Christine; Berqouch, Nawel; Dhimane, Hamid; Clermont, Guillaume; Blanchard‐Desce, Mireille; Ogden, David; Dalko, Peter I.
• Is Part Of: Chemistry. Volume 23:Issue 8(2017)
• Page Start: 1860
• Page End: 1868
• Publication Date: 2017-01-03
• Subjects: absorption -- chromophores -- nonlinear optics -- quinolines; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201604500
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Quadrupolar probes derived from 8‐dimethylamino‐quinoline (8‐DMAQ) having a pegylated fluorene core were prepared and studied under "one‐photon" ( λ =365 nm) and "two‐photon" (TP) ( λ =730 nm) irradiation conditions. Compound1 a was identified as the most efficient probe by UV activation that showed sequential release of acetic acid as a model. Although the probe showed high two‐photon absorption it stayed inert under femtosecond irradiation conditions. Fast and selective photolysis was observed, however, by using picosecond irradiation conditions with a remarkably high TP uncaging cross‐section ( δ u =2.3 GM). Abstract : Light‐sensitive probes, derived from quinoline and pegylated fluorene, show high linear and two‐photon absorption values, fast fragmentation by λ =366 nm irradiation, and large two‐photon photolysis cross‐sections when excited with 1 ps pulses.