title: Two-photon absorption cross-sections of reference dyes: a critical examination.
abstract: The electronic structure and one- and two-photon absorption spectra of four fluorophores, p-bis(o-methoxystyryl)benzene (Bis-MSB), coumarin 307, fluorescein and rhodamine B, commonly used as reference compounds for two-photon absorption spectra, have been theoretically calculated and compared with available experimental data. The possible reasons for the wide discrepancies in two-photon absorption cross-sections reported in the literature are discussed on the basis of the theoretical findings. The role of a solvent environment on the electronic one- and two-photon absorption spectra is also studied. We highlight some necessary precautions that one needs to take when comparing literature results of two-photon absorption cross-sections.
authors: Department of Theoretical Chemistry, Royal Institute of Technology, Roslagstullsbacken 15, 106 91 Stockholm, Sweden. prakash@theochem.kth.se
authors: Prakash
authors: P
authors: Chandra Jha
authors: Yanhua
authors: Y
authors: Wang
authors: Hans
authors: H
authors: Agren
mesh_terms: D002627:Chemistry, Physical / Q000379:methods*; D003374:Coumarins / Q000737:chemistry; D004583:Electrons; D019793:Fluorescein / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D015233:Models, Statistical; D008962:Models, Theoretical; D017785:Photons; D015203:Reproducibility of Results; D012235:Rhodamines / Q000737:chemistry; D012984:Software; D012997:Solvents; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods; D013343:Styrenes / Q000737:chemistry
chemical_list: D003374:Coumarins; D005456:Fluorescent Dyes; D012235:Rhodamines; D012997:Solvents; D013343:Styrenes; C083050:4-bis(2-methylstyryl)benzene; C030123:coumarin; C029773:rhodamine B; D019793:Fluorescein