Related Experiment Video
Updated: May 28, 2025
07:20
Author Spotlight: Accelerating Discovery in Microporous Material Chemistry
Published on: October 6, 2023
3.5K
Ba2BP7N14 - A Quaternary Alkaline Earth Nitridoborophosphate with a Mixed 3D Network Structure
Amalina T Buda1, Reinhard M Pritzl1, Monika M Pointner1
1Department of Chemistry, University of Munich (LMU), Butenandtstraße 5-13, 81377, Munich, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 13, 2025
Summary
Researchers synthesized a novel nitridoborophosphate, Ba2BP7N14, showcasing high stability and blue luminescence when doped with Europium (Eu2+). This discovery opens avenues for new phosphors in lighting applications.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Chemistry
Background:
- Alkaline earth nitridophosphates are of interest due to their thermal and chemical stability.
- Doping with Europium (Eu2+) shows promise for luminescent applications, particularly in light-emitting diodes.
- Mixed tetrahedra-based nitridophosphates offer structural diversity for exploring structure-property relationships.
Purpose of the Study:
- To report the synthesis and characterization of the first quaternary alkaline earth nitridoborophosphate, Ba2BP7N14.
- To investigate the structural, thermal, and optical properties of this new material.
- To explore its potential as a luminescent material upon Europium doping.
Main Methods:
- Synthesis under high pressure (8 GPa) and high temperature (1600 °C) using a multianvil press.
- Structural characterization via single-crystal and powder X-ray diffraction (SCXRD, PXRD).
- Compositional and electronic analysis using elemental analysis, electron microscopy (STEM, EELS), and solid-state NMR spectroscopy (31P, 11B MAS NMR).
- Optical band gap determination via diffuse reflectance spectroscopy.
- Thermal behavior analysis using temperature-dependent powder X-ray diffraction.
Main Results:
- Successful synthesis of Ba2BP7N14, crystallizing in the barylite-1O polytype.
- Characterization revealed a highly condensed mixed (B,P)-N anionic 3D network composed of PN4 and mixed (P,B)N4 tetrahedra.
- The undoped material exhibits a determined optical band gap, and the doped sample shows blue emission peaking at 422 nm upon near-UV irradiation.
Conclusions:
- Ba2BP7N14 represents a novel quaternary nitridoborophosphate with a unique structure.
- The material demonstrates good thermal stability and promising luminescence properties suitable for lighting applications.
- This work expands the family of condensed nitridophosphates and highlights their potential in materials science.
Related Concept Videos
02:42Valence Bond Theory
8.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.4K
02:42Ionic Crystal Structures
14.1K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.1K
02:55Exceptions to the Octet Rule
27.5K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
27.5K
02:34Structural Isomerism
19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K
03:24Hybridization of Atomic Orbitals I
46.3K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
46.3K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.2K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.2K