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Issue 32, 2017
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Two- and three-photon absorption properties of fan-shaped dendrons derived from 2,3,8-trifunctionalized indenoquinoxaline units: synthesis and characterization

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Abstract

A model compound set that contains a series of fan-shaped chromophores using 2,3,8-trifunctionalized indenoquinoxaline units as the major building block of their π-framework was synthesized and characterized for their two- and three-photon absorption properties in the femtosecond regime based on two-photon-excited fluorescence and Z-scan techniques. The experimental results show that these dendritic fluorophores manifest strong and wide-dispersed two- and three-photon absorption bands within the near-infrared region, which indicates that 2,3,8-trifunctionalized indenoquinoxaline units are favorable building moieties for the construction of highly active multi-photon dyes. The maximum values of two- and three-photon absorption cross-sections for the largest dendron (i.e. compound D4) are ≈24 800 GM and 6 × 10−78 cm6 s2, respectively. A nearly linear ascending relationship between π-structural expansion and nonlinear absorption is observed for these compounds, implying that the currently utilized structural arrangement does not exert deleterious or cooperative effects on the multi-photon absorption properties of this model system. In addition, a representative dendritic structure is selected to demonstrate efficient optical power-limiting against femtosecond laser pulses at 790 nm.

Graphical abstract: Two- and three-photon absorption properties of fan-shaped dendrons derived from 2,3,8-trifunctionalized indenoquinoxaline units: synthesis and characterization

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Publication details

The article was received on 11 Jun 2017, accepted on 14 Jul 2017 and first published on 17 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02584J
Citation: J. Mater. Chem. C, 2017,5, 8219-8232
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    Two- and three-photon absorption properties of fan-shaped dendrons derived from 2,3,8-trifunctionalized indenoquinoxaline units: synthesis and characterization

    T. Lin, W. Chien, L. M. Mazur, Y. Liu, K. Jakubowski, K. Matczyszyn, M. Samoc and R. W. Amini, J. Mater. Chem. C, 2017, 5, 8219
    DOI: 10.1039/C7TC02584J

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