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Synthesis and Luminescence Properties of Ag_2S and PbS Clusters in Zeolite A

机译:沸石A中Ag_2S和PbS团簇的合成及发光性质

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摘要

Zeolite A provides a suitable environment to host Ag_2S and PbS clusters,so that spectroscopic investigations on very small particles are possible.The Ag_2S monomer is colorless and shows photoluminescence at 490 nm with a lifetime of 300 mu s,while the absorption and luminescence of Ag_4S_2 and larger clusters are red-shifted.The properties of these Ag_2S/zeoli-te A materials depend on the co-cations.Results for Li~+,Na~+,K~+,Rb~+,Cs~+,Mg~(2+),Ca~(2+),and Sr~(2+)are reported.Excitation energy transfer between Ag_2S and Ag_4S_2 has been studied in materials containing Ca~(2+)co-cations.PbS particles can be prepared by the same method as Ag_2S in the cavities of zeolite A.The PbS monomers obtained are yellow and show photoluminescence at 570 nm,with a lifetime of 700 ns.
机译:沸石A为容纳Ag_2S和PbS团簇提供了合适的环境,因此可以对非常小的颗粒进行光谱研究。Ag_2S单体无色,在490 nm处显示光致发光,寿命为300μs,而Ag_4S_2的吸收和发光这些Ag_2S /沸石A材料的性质取决于共阳离子。Li〜+,Na〜+,K〜+,Rb〜+,Cs〜+,Mg〜的结果报道了(2 +),Ca〜(2+)和Sr〜(2+)。在含Ca〜(2+)共阳离子的材料中研究了Ag_2S和Ag_4S_2之间的激发能传递。可以制备PbS颗粒用与Ag_2S相同的方法在沸石A的空腔中制得。PbS单体为黄色,在570 nm处显示光致发光,寿命为700 ns。

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