Synthesis of new cyclotriphosphazene derivatives bearing Schiff bases and their thermal and absorbance properties

Abstract

In this study, a series of cyclotriphosphazene derivatives containing a Schiff base (3a-3d) were synthesized by the reactions of hexachlorocyclotriphosphazene (1) with bis-aryl Schiff bases (2a-2d) having different terminal groups (H, F, Cl, and Br). The products (3a-3d) were characterized by elemental and mass analyses, FT-IR, and 1 H, 13 C, and 31 P NMR spectroscopies. Furthermore, the structure of compound 3a was also determined by X-ray crystallography. The thermal behaviors and the spectral properties of the new cyclotriphosphazene compounds (3a-3d) were investigated and the results were compared in the series.

Spiro-cyclotriphosphazene with three functional end groups: synthesis and structure characterization of new polycyclotriphosphazenes with Schiff-base groups

“…These compounds have been gaining attention because of their exceptional properties. Therefore, the structural characteristics, thermal properties, fire retardation, absorbance, liquid crystalline, biomedicine, chelation of different metals and semiconduc-tor properties of these compounds have been extensively studied by many research [20][21][22][23][24][25][26][27][28][29].…”

A Review on Synthesis, Structural, Flame Retardancy and Dielectric Properties of Hexasubstituted Cyclotriphosphazene

“…It has good flame retardant properties, which are also important in the build-up of the electronic application, and has a dielectric property. To conclude, an extensive study about these two related properties with high-potential compounds, which is cyclotriphosphazene, needs Dogan et al also reported that cyclotriphosphazene derivatives containing a bis-aryl Schiff base having a different terminal group (H, F, Cl, and Br) have good thermal properties, which makes them suitable as a flame retardant additive to slow down the spread of the flame ignition or slow down the spread of flame after ignition of materials [15].…”

“…Furthermore, the properties of polyphosphazenes change as a result of the different side groups, such as elasticity, thermal stability, solvent resistance, biological biological utility, electro-optical properties, and so on, indicating that the polyphosphazenes can be adjusted and controlled depending on the materials they are applied with [10][11][12][13][14]. Dogan et al also reported that cyclotriphosphazene derivatives containing a bis-aryl Schiff base having a different terminal group (H, F, Cl, and Br) have good thermal properties, which makes them suitable as a flame retardant additive to slow down the spread of the flame ignition or slow down the spread of flame after ignition of materials [15].…”

“…Dogan et al also reported that cyclotriphosphazene derivatives containing a bis-aryl Schiff base having a different terminal group (H, F, Cl, and Br) have good thermal properties, which makes them suitable as a flame retardant additive to slow down the spread of the flame ignition or slow down the spread of flame after ignition of materials [ 15 ].…”

Crystallization of Nano-Sized Macromolecules by the Example of Hexakis-[4-{(N-Allylimino)methyl}phenoxy]cyclotriphosphazene

“…Aryloxycyclophosphazenes containing azomethine groups are of particular research interest. They are widely used in biomedicine [39], as flame retardant materials [40], for coordination chemistry and catalysis [41], and as fluorescent dyes [42]. This is due to their polyfunctionality, biocompatibility, high thermal stability, flame resistance, and UV radiation resistance.…”