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Facile synthesis of sub-nanometer Cd4S6+ and Cd2S2+ cluster in zeolite Y and its structural characterization
- Source :
- Journal of Porous Materials. 28:1361-1369
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- 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 refined using all intensities to the final error index R1/wR2 = 0.048/0.156 (for Fo > 4σ(Fo)). Approximately 13 Cd2+ and 53 Na+ ions per unit cell were found at two and four crystallographically distinct positions, respectively: two site-Iʹ positions (in the sodalite cavities opposite double 6-rings (D6Rs)) are occupied by 5 and 7.5 Cd2+ ions, respectively, per unit cell. The 0.5 Cd2+ ions per unit cell are at site IIʹ in the sodalite cavity. The 2 Na+ ion is located at the center of the D6R (site I). The 15.5 Na+ ions per unit cell are located at site Iʹ. Site-II position is occupied by 31.5 Na+ ions per unit cell. The remaining 4 Na+ ions per unit cell are located at sites IIIʹ near triple 4-rings in the supercage. Finally, 0.5 and 1.5 S2− ions per unit cell, associated with Cd2+ ions, were found at the center of sodalite cavity and opposite 6-ring in the sodalite cavity, respectively. The 1 S2− ion at the center of the sodalite cavity is coordinated to 4 Cd2+ ions at site Iʹ to give a centered-tetrahedral cationic cluster, Cd4S6+, and the other S2− ion opposite 6-ring in the sodalite cavity bridges between two Cd2+ ions at site Iʹ to give a cationic cluster with a bent arrangement, Cd2S2+, in 6.3% and 18.8% of the sodalite cavities of zeolite Y (Si/Al = 1.56), respectively.
- Subjects :
- Materials science
Mechanical Engineering
Cationic polymerization
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Synchrotron
0104 chemical sciences
Ion
law.invention
Catalysis
chemistry.chemical_compound
Crystallography
chemistry
Mechanics of Materials
law
Cluster (physics)
Sodalite
General Materials Science
Nanometre
0210 nano-technology
Zeolite
Subjects
Details
- ISSN :
- 15734854 and 13802224
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Journal of Porous Materials
- Accession number :
- edsair.doi...........2062250ea4b954fc5562c1b576f84453