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Updated: May 29, 2025
08:26
Synthesis of Zeolites Using the ADOR Assembly-Disassembly-Organization-Reassembly Route
Published on: April 3, 2016
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Exploring Oxonitridosilicate Synthesis: From Oxide Zeolites to Nitride Frameworks
Hongwei Zheng1, Xiaoming Wang1, Chenchen Cao1
1Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, Shaanxi, P. R. China.
Inorganic Chemistry
|February 4, 2025
Summary
Researchers synthesized novel CAN-typed oxonitridosilicates, La5Ca9O2(SiNO3)[Si12N24] and Ce-doped variants. These materials feature a unique anionic framework of [SiN4] tetrahedra and exhibit orange-red luminescence, paving the way for new phosphors.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Chemistry
Background:
- Zeolite-like materials offer tunable structures for diverse applications.
- Oxonitridosilicates represent a class of advanced inorganic compounds with unique properties.
- The CAN (crinite)-type structure is explored for novel silicate frameworks.
Purpose of the Study:
- To synthesize and characterize the first CAN-typed zeolite-like oxonitridosilicates.
- To elucidate the crystal structure and bonding of these novel compounds.
- To investigate the luminescent properties of Ce-doped oxonitridosilicates.
Main Methods:
- Single-crystal X-ray diffraction (SCXRD) for structural determination.
- Neutron powder diffraction (NPD) data refinement.
- Charge density difference calculations to analyze bonding.
- Photoluminescence spectroscopy to assess optical properties.
Main Results:
- Successful synthesis of Ln5Ca9O2(SiNO3)[Si12N24] (Ln = La, Ce) with the CAN-typed structure.
- Crystal structure determined in hexagonal space group P63mc.
- Anionic framework composed of [SiN4] tetrahedra forming t-can and t-ato units.
- Ca2+ cations balance charge from N3- substitution for O2-.
- Ce3+-doped material exhibits orange-red emission at 630 nm under UV excitation.
Conclusions:
- The study presents the first CAN-typed oxonitridosilicates, expanding the family of zeolite-like materials.
- The crystal structure and charge balance mechanisms are well-defined.
- The luminescent properties of the Ce-doped compound suggest potential applications as phosphors.
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