Facile Template-Free Fabrication of Aluminum-Organophosphorus Hybrid Nanorods: Formation Mechanism and Enhanced Luminescence Property

Abstract

Recently, much effort has been directed toward fabrication of metalorganophosphorus hybrids with microporous, fibered, layered, and open structures to obtain desired mechanical, optical, electric, and catalytic properties. In this work, aluminum−phosphorus hybrid nanorods (APHNRs) with regular morphology were prepared by a template-free hydrothermal reaction of aluminum hydroxide with diphenylphosphinic acid (DPPA). Structure characterization of APHNRs by Fourier transform infrared spectroscopy, laser Raman spectroscopy, and X-ray diffraction demonstrate a structure with aluminophosphate main chains and phenyl pendant groups, which enable self-assembly into nanorods. The reaction conditions and the structures of phosphinic acids appear to have a significant impact on the morphology and size of nanorods. Moreover, the evolution of morphology and structure assembly during the forming process of APHNRs, as monitored by SEM and XRD, reveal a decomposition-assembly propagation process where the driving force of assembly is attributed to π−π stacking interactions between phenyl pendant groups. APHNRs show a significant increase in light emission relative to pure DPPA due to their compact structure resulting from the π−π stacking interaction. Detailed investigation revealed that photoluminescence was remarkably amplified by enhancing the compactness of APHNRs.

Linear coordination polymers based on aluminum phosphates: synthesis, crystal structure and morphology

“…1 H, 27 27 Al MAS NMR measurements were performed on a Bruker DSX 300 spectro-meter at a spinning rate of 6-8 kHz with proton high-power decoupling and a resonance frequency of 78.20 MHz. Solidstate 31 P CP/MAS NMR measurements were conducted on a Bruker DSX 300 spectrometer at a spinning rate of 5-8 kHz, resonance frequency of 121.50 MHz and contact time of 1-1.5 ms. FT-IR spectra were recorded on a Thermo Scientific Nicolet 6700 spectrometer equipped with a Smart Orbit Diamond ATR accessory. Raman spectra were recorded on a Thermo Nicolet Almega XR spectrometer equipped with a 532 nm laser.…”

“…organogelators, flame retardants, fillers in polymer composites, processable precursors of mesoporous zeolites, and thin films with high abrasion resistance and low refractive index. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] An important class of these materials consists of organically modified aluminum phosphates synthesized from monoor diesters of phosphoric acids and various sources of aluminum cations. The reaction of phosphoric acid monoesters with aluminum inorganic salts or trialkoxides has been successfully employed in the synthesis of two-dimensional plate-like particles consisting of aluminum phosphate phases separated by long organic chains, 16,18,19 as well as nanosized octameric and decameric clusters which can serve as building blocks for framework structures.…”

“…In view of those objectives we developed effective methods for the synthesis of pure aluminum tris(diorganophosphate) (DOPAl) utilizing different sources of aluminum. We examined the physicochemical and morphological properties of the resulting materials using single-crystal or powder XRD studies, 27 Al and 31 P NMR, Raman or FT-IR spectroscopy, as well as the SEM technique. In this paper, we report the synthesis and characterization of coordination polymers with the general formula Al[O 2 P(OR) 2 ] 3 containing alkyl groups [R = Me (DMPAl)], Et (DEPAl), n Pr (DnPPAl), i Pr (DiPPAl), n Bu (DBPAl), CH 2 CH(Et) (CH 2 ) 3 CH 3 (BEHPAl) or phenyl moieties [R = Ph (DPhPAl)] in aluminum phosphate monomeric units.…”

Effect of particle size on flame retardancy and mechanical properties of hydroxyethyl diphosphate modified aluminum hydroxide intrinsic polyethylene terephthalate

“…the diffraction HA pattern does not show any additional reflections. The characteristic reflection at 18.2 2θ corresponds to the (002) crystal plane of ATH, 32 which indicates that the synthesized products do not change the crystal structure of ATH. 33 Figure 4 shows the SEM micrographs of ATH and HA.…”

Preparation of ferric phosphonate/phosphinate and their special action on flame retardancy of epoxy resin

“…Metal phosphonates/phosphinates are a family of organic–inorganic hybrid materials with polymeric backbone structure . Recently, nano‐scaled metal phosphonates/phosphinates have been extensively studied owing to their interesting flame‐retardant, optic, and catalytic properties . This family of nanomaterials provides a convenient avenue to nano‐scaled metal‐phosphorus hybrids.…”