Abstract
Multiple-phenyl phosphorous compounds are a group of chemical materials that have been used as reactants, pharmaceutical intermediates, extractants, and catalysts in organic synthetic reactions. However, the crystal growth of bulk crystals of multiple-phenyl phosphorous compounds, which may expand their applications in photonics technology, have been largely overlooked. In this article, the crystal growth of tetraphenylphosphonium bromide (TPPB) has been studied in organic solvents and water. The crystal structures and crystallization features are analyzed by X-ray diffraction data. By a slow temperature-lowering method, a single-crystal of TPPB (2H2O) with the size of 27 × 20 × 20 mm3 has been obtained in water. The basic thermal and optical properties were characterized. We find that the TPPB (2H2O) crystal shows excellent transparent property in the near-IR region. Large Raman shifts and strong Raman scattering intensity indicate that TPPB is a potential candidate in Raman-scattering-based nonlinearity applications.
Highlights
Multiple-phenyl phosphorus-centered compounds such as triphenylphosphine oxide (TPPO) [1], triphenylphosphine sulfide (TPPS) [2], and phosphonium salts [3] are a class of tetrahedral-shaped molecules based on the sp3 hybridization of a phosphorous atom [4]
We found that tetraphenylphosphonium bromide (TPPB) can grow into a large-size single-crystalin in3:2
The results showed that TPPB forms a dichloromethane were analyzed by X-ray results showed
Summary
Multiple-phenyl phosphorus-centered compounds such as triphenylphosphine oxide (TPPO) [1], triphenylphosphine sulfide (TPPS) [2], and phosphonium salts [3] are a class of tetrahedral-shaped molecules based on the sp hybridization of a phosphorous atom [4]. They have generated great interest because of their important applications in organic chemical fields. Multiple-phenyl phosphorus-centered compounds are characterized by rigid molecular structures in small-size and high symmetry, which have the possibility to grow into large-size crystal materials.
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