The 20th International Conference on Phosphorus Chemistry , 2014-06-28

Title : ( Sonochemically Synthesized LaPO4 Nanopowder and Its Catalytic Activity )

Authors: Mehrdad Pourayoubi , Zohreh Shobeiri , Marko RODIC , Vladimir DIVJAKOVIC ,

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Up to now, some procedures have been developed for the synthesis of LaPO4 salt, in the nanoscale [1], and we report here the preparation of LaPO4 nanoparticles under ultrasonic irradiation by using La(NO3)3.6H2O and NaH2PO4.2H2O in water/ethylene glycol. The morphology and average particle size were studied by SEM-EDX and XRD. The SEM image showed uniformity in morphology of the prepared LaPO4, and the existence of lanthanum, phosphorous, and oxygen atoms were confirmed by SEM-EDX analysis. XRD pattern of sample is in agreement with monoclinic system of the LaPO4 in P21/n space group (JCPDS 32-0493). The average grain size, of 41 nm, was calculated by using Scherrer equation. The synthetic lanthanum phosphate was used as a new heterogeneous and highly useful nano-catalyst for the synthesis of 3-(4-nitrophenyl)-1-phenyl-3-(phenylthio)propan-1-one from the conjugate addition of thiophenol to p-nitrochalcone. The product was characterized by single-crystal X-ray determination, IR, 1HNMR, 13CNMR, elemental analysis and mass spectrometry. The low solubility of LaPO4 salt in water and its high thermal stability make it as a good candidate in catalytic applications. Moreover, due to the presence of PO43–, the La3+ ion is oxophilic enough to form a strong coordinate bond with the oxygen atom in a carbonyl compound. This is a suitable characteristic to activate Cβ in the α,β-unsaturated ketones giving the sufficiently electrophilic property required in the conjugate addition considered in this work.


, LaPO4 Nanopowder, 3-(4-nitrophenyl)-1-phenyl-3-(phenylthio)propan-1-one, single-crystal X-ray determination
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author = {Pourayoubi, Mehrdad and Shobeiri, Zohreh and Marko RODIC and Vladimir DIVJAKOVIC},
title = {Sonochemically Synthesized LaPO4 Nanopowder and Its Catalytic Activity},
booktitle = {The 20th International Conference on Phosphorus Chemistry},
year = {2014},
location = {Dublin},
keywords = {LaPO4 Nanopowder; 3-(4-nitrophenyl)-1-phenyl-3-(phenylthio)propan-1-one; single-crystal X-ray determination},


%0 Conference Proceedings
%T Sonochemically Synthesized LaPO4 Nanopowder and Its Catalytic Activity
%A Pourayoubi, Mehrdad
%A Shobeiri, Zohreh
%A Marko RODIC
%J The 20th International Conference on Phosphorus Chemistry
%D 2014