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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles
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Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

机译:基于CDSE量子点和Ag纳米粒子的硫醇取代的酞菁的纳米缀合物具有改进性能的光学限制器

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摘要

Two alternative synthetic approaches affording a low-symmetry A(3)B-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).
机译:产生两种替代的合成方法,其含有两个[2' - (2' - (2' - (2' - (2' - 巯基乙氧基)乙氧基]锚定取代基的替代效应A(3)B型酞菁1。 由于硫醇基团的存在,该酞菁可以与顶部封装(TOPO--辛基膦)的CDSE量子点(CDSE-QDS)或油胺封端的银纳米颗粒(AG-NPS)缀合。 通过使用开口孔径Z扫描技术研究起始酞菁,量子点,纳米颗粒及其缀合物的非线性光学行为,揭示了纳米材料上的1的接枝导致1-AG的光学限制的显着增强 1-CDSE与各个组件相比。 缀合物1-CDSE是与量子点缀合的基于PC的基于PC的基于PC的硫醇的实施例,揭示了优异的限制特性,限制阈值低于0.18J厘米(-2)。

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