Two-photon absorption properties of four new pentacoordinated diorganotin complexes derived from Schiff bases with fluorene
作者:Alejandro Enríquez-Cabrera、Alberto Vega-Peñaloza、Violeta Álvarez-Venicio、Margarita Romero-Ávila、Pascal G. Lacroix、Gabriel Ramos-Ortiz、Rosa Santillan、Norberto Farfán
DOI:10.1016/j.jorganchem.2017.12.014
日期:2018.1
paper we report the synthesis and characterization of four novel pentacoordinated diorganotin complexes, obtained through a methodology that involves a multicomponent reaction of 4-([9H-fluorene-2-yl]ethynyl)-2-hydroxybenzaldehyde, 2-amino-5-nitrophenol and diphenyl or dibutyl-tin oxides. Diorganotin complexes 8–11 were obtained in high yields (70–80%) and were fully characterized by solution NMR (1H
The synthesis and characterization of new 1,10-phenanthroline-based chromophores LT1, LT2 and LD1 featuring fluoreneunit(s) are reported. Their absorption and emission as well as their two-photonabsorptionproperties in the 450–650 nm spectral range are discussed in comparison with the parent 1,10-phenanthroline and already described ligands L1 and L2.
A series of novel monodisperse star-shaped oligo(fluoreneethynylene)s, which contain hexahexyltruxene as the central core linked with oligo(fluoreneethynylene) as the arms, are presented.
Tuning two-photon absorption cross-sections for triphenylamine derivatives
作者:Zhen Fang、Richard D. Webster、Marek Samoc、Yee-Hing Lai
DOI:10.1039/c3ra42789g
日期:——
A methylene bridge link connecting the ortho-positions within the triphenylamine scaffold increases the molecular planarity significantly. The one-photon spectroscopies of bridged triphenylamine molecules show considerable extended conjugation relative to their triphenylamine counterparts, leading to enhanced two-photon absorption (TPA) cross-sections. Various substituents at the scaffold have been prepared and studied. Using a femtosecond laser source Z-scan method, the TPA cross-sections were characterized. The maximum magnitude of the TPA cross-section is ∼4800 GM, which is four times that of its triphenylamine counterpart.