1126881-22-8Relevant articles and documents
Bis(dioxaborine) Dyes with Variable π-Bridges: Towards Two-Photon Absorbing Fluorophores with Very High Brightness
Marín, á. Moneo,Telo, Jo?o P.,Collado, Daniel,Nájera, Francisco,Pérez-Inestrosa, Ezequiel,Pischel, Uwe
, p. 2929 - 2935 (2018)
Bis(dioxaborine) dyes of the A-π-A format (A: acceptor, π: conjugated bridge) were prepared and photophysically characterized. The best performing dyes feature (a) visible-light absorption (>400 nm), (b) high molar absorption coefficients (up to 70000 m?1 cm?1), (c) Stokes shifts in the range of ca. 2500–5800 cm?1, and (d) strong fluorescence emission with quantum yields of up to 0.74. This yields very bright-emitting dyes for one-photon excitation. However, the most intriguing feature of the dyes is their strong two-photon absorption. This was achieved by means of increased π-conjugation in the phenylene or phenylene-thiophene bridges through the variation of the conjugation length and rigidity. This provided two-photon absorption cross sections of up to 2800 GM (1 Goeppert-Mayer (GM)=10?50 cm4 s photon?1). Considering the mentioned high fluorescence quantum yields, exceptionally bright-emitting A-π-A two-photon absorbing dyes with low molecular mass are obtained. Time-dependent density-functional theory calculations corroborated the experimental results.
Two-photon fluorescent dye based on phenyl-substituted boron-dipyrromethene and diphenyl indenofluorene and synthetic method thereof
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Paragraph 0019; 0022, (2017/08/28)
The invention discloses two-photon fluorescent dye based on phenyl-substituted boron-dipyrromethene and diphenyl indenofluorene; the two-photon fluorescent dye has a structural general formula shown in the description, wherein R is C1-C18 alkyl; the synthetic steps include: using 2,4-dimethylpyrrole and benzaldehyde as raw materials to generate 5-phenyl-substituted and 2,6-iodide boron-dipyrromethene; reducing indenofluorene dione, alkylating, brominating, carrying out Pd(0) catalytic amination, carrying out Pd(0) and CuI catalyzed Sonogashira cross-coupling reaction, and removing trimethylsilyl to generate diphenylamine-indenofluorene-ethynyl compound; enabling the 2,6-iodide boron-dipyrromethene to react with the diphenylamine-indenofluorene-ethynyl compound to obtain the two-photon fluorescent dye; the two-photon fluorescent dye has high two-photon fluorescence, maximum two-photon absorption section in toluene reaches 776 GM, fluorescent quantum yield reaches 0.46, and a new idea to synthesize and apply two-photon fluorescent dyes based on boron-dipyrromethene is provided.
A new synthetic procedure to 2,8-diaminoindeno[1,2-b] fluorene as a blue light emitting material
Pham, Van Chung,Huh, Geun,Kim, Jungahn,Choo, Dong Joon,Lee, Jae Yeol
scheme or table, p. 1781 - 1783 (2011/12/15)
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