| Abstract |
New fluorescent oxazolone derivatives with high two-photon absorption cross-section were synthesized. Electron donor (phenyl, dimethylaniline and furanyl) and acceptor (nitrobenzene and ethenyl-phenyl-benzimidazol) groups have been appended to the methylene end of 4-(methylidene)-2-phenyl-1,3-oxazol-5(4H)-one in order to produce an highly conjugated pi-system with push pull geometry. The linear and nonlinear optical properties of the oxazolones have been determined. The compounds with a high charge transfer from the substituent group to the oxazolone ring have relatively high two-photon absorption cross-sections (80-100 GM). The best performing nonlinear fluorophore being the benzimidazol derivative with a two-photon absorption cross-section of 80 GM and a relatively high emission quantum yield, phi = 0.31. (c) 2012 Elsevier Ltd. All rights reserved. |
