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Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

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Abstract

Two alternative synthetic approaches affording a low-symmetry A3B-type phthalocyanine 1 bearing two [2′-(2′′-mercaptoethoxy)ethoxy] anchoring substituents were developed. Due to the presence of thiol groups, this phthalocyanine could be conjugated with TOPO-capped (TOPO - trioctylphosphine)-capped CdSe quantum dots (CdSe-QDs) or oleylamine capped silver nanoparticles (Ag-NPs). The nonlinear optical behaviour of starting phthalocyanine, quantum dots, nanoparticles and their conjugates was studied by using an open aperture Z-scan technique, revealing that the grafting of 1 onto the nanomaterials resulted in a significant enhancement of the optical limiting of 1-Ag and 1-CdSe in comparison with the individual components. The conjugate 1-CdSe, being the first example of Pc-based thiol conjugated with quantum dots, revealed superior limiting characteristics with a limiting threshold below 0.18 J cm−2.

Graphical abstract: Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

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Publication details

The article was received on 13 Oct 2017, accepted on 31 Oct 2017 and first published on 31 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT03867D
Citation: Dalton Trans., 2017, Advance Article
  • Open access: Creative Commons BY license
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    Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

    D. O. Oluwole, A. V. Yagodin, J. Britton, A. G. Martynov, Y. G. Gorbunova, A. Yu. Tsivadze and T. Nyokong, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT03867D

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