Figure - available from: Journal of Porous Materials
This content is subject to copyright. Terms and conditions apply.
Reaction hydrated Cd–Y with Na2S(aq) results in the formation of these two cationic cadmium sulfide clusters within the zeolite
Source publication
The Cd4S6+ and Cd2S2+ clusters in the sodalite cavities were synthesized by reaction of the fully Cd2+-exchanged zeolite Y (Si/Al = 1.56) and 0.1 M Na2S(aq) solution at 294 K for 2 days. The single-crystal structure was determined at 100(1) K by synchrotron X-ray diffraction techniques in the cubic space group Fd\(\overline{3}\)m. The structure was...
Similar publications
![Top: Unit cell packing with voids[26] (red surfaces) viewed along the c...](publication/359236744/figure/fig1/AS:11431281246131625@1716337373352/Top-Unit-cell-packing-with-voids26-red-surfaces-viewed-along-the-c-axis-of-unit-cell_Q320.jpg)
Glass‐forming metal–organic frameworks (MOFs) have novel applications, but the origin of their peculiar melting behavior is unclear. Here, we report synchrotron X‐ray diffraction electron densities of two zeolitic imidazolate frameworks (ZIFs), the glass‐forming Zn‐ZIF‐zni and the isostructural thermally decomposing Co‐ZIF‐zni. Electron density ana...
Citations
The extra-framework zinc sulfide cationic clusters, Zn4S⁶⁺ and Zn2S²⁺, have been introduced into zeolite Y (FAU, Si/Al = 1.56). The |Zn24.5Na12(Zn4S⁶⁺)0.5(Zn2S²⁺)5.5|[Si117Al75O384]-FAU was prepared by allowing aqueous 0.1 M Na2S solution to flow past a |Zn37.5|[Si117Al75O384]-FAU at 294 K for 2 days. Its structure was determined by single-crystal synchrotron X-ray diffraction techniques. The crystallographic study showed that one sulfide ion at the center of the sodalite cavity coordinates to four Zn²⁺ ions at site I’ to give a centered-tetrahedral cationic cluster, Zn4S⁶⁺, and the other sulfide ion opposite 6-ring in the sodalite cavity bridges between two Zn²⁺ ions at site I’ to give a cationic cluster with bent arrangement, Zn2S²⁺, in 6.3% and 68.8% of the sodalite cavity of zeolite Y, respectively. Through high-resolution transmission electron microscope image, zinc sulfide quantum dots (QDs) group with the size of one unit cell (ca. 3 nm) in which hundreds were distributed was identified. By using UV–vis diffuse reflectance spectroscopy, it was confirmed that the zinc sulfide QDs occupied in the structure of zeolite Y exhibited enhanced optical activity because of the quantum size effect compared with that of bulk zinc sulfide. In this study, a method for quantizing semiconducting compounds in the cavity of zeolite Y was presented more easily, and its properties were investigated in more depth. The results proved that zeolite could be applied and used as a quantum container for the quantization of semiconductor compounds.
