title: Enhancement of a two-photon absorption cross section (TPACS)--design and synthesis of a novel class of photochromic molecules with large TPACS.
abstract: Two novel photochromic compounds were designed and synthesized; the two-photon absorption (TPA) cross section of both were measured with a nanosecond laser pulse; their TPACS (delta) values are around 25 x 10(-46) cm4 s photon-1 molecule-1 in acetonitrile; the molecular structure of the target compounds have a 3-methyl-1-benzothiophen-2-yl moiety, which can greatly enhance the two-photon absorption cross section.
authors.affiliation: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, People's Republic of China.
authors.forename: G L
authors.initials: GL
authors.lastname: Pan
authors.forename: M G
authors.initials: MG
authors.lastname: Fan
authors.forename: P
authors.initials: P
authors.lastname: Fan
authors.forename: H Z
authors.initials: HZ
authors.lastname: Wang
authors.forename: Z C
authors.initials: ZC
authors.lastname: Wei