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Int. J. Mol. Sci. 2011, 12(7), 4365-4377; doi:10.3390/ijms12074365
Article

Novel Recovery of Nano-Structured Ceria (CeO2) from Ce(III)-Benzoxazine Dimer Complexes via Thermal Decomposition

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Received: 24 March 2011; in revised form: 15 June 2011 / Accepted: 21 June 2011 / Published: 5 July 2011
(This article belongs to the Section Material Sciences and Nanotechnology)
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Abstract: N,N-bis(2-hydroxybenzyl)alkylamines, benzoxazine dimers, are the major product produced from benzoxazine monomers on mono-functional phenol by the one  step ring opening reaction. Due to the metal responsive property of benzoxazine dimers, in this present work, N,N-bis(5-methyl-2-hydroxybenzyl)methylamine (MMD), N,N-bis (5-ethyl-2-hydroxybenzyl)methylamine (EMD), and N,N-bis(5-methoxy-2-hydroxybenzyl) methyl amine (MeMD), are considered as novel ligands for rare earth metal ion, such as cerium(III) ion. The complex formed when the clear and colorless solutions of cerium nitrate and benzoxazine dimers were mixed, results in a brown colored solution. The metal-ligand ratios determined by the molar ratio and the Job’s methods were found to be in a ratio of 1:6. To clarify the evidence of the complex formation mechanism, the interactions among protons in benzoxazine dimers both prior to and after the formation of complexes were determined by means of 1H-NMR, 2D-NMR and a computational simulation. The single phase ceria (CeO2) was successfully prepared by thermal decomposition of the Ce(III)-benzoxazine dimer complexes at 600 °C for 2 h, was then characterized using XRD. In addition, the ceria powder investigated by TEM is spherical with an average diameter of 20 nm.
Keywords: benzoxazine dimers; cerium complex; ceria; nanoparticles benzoxazine dimers; cerium complex; ceria; nanoparticles
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Veranitisagul, C.; Kaewvilai, A.; Sangngern, S.; Wattanathana, W.; Suramitr, S.; Koonsaeng, N.; Laobuthee, A. Novel Recovery of Nano-Structured Ceria (CeO2) from Ce(III)-Benzoxazine Dimer Complexes via Thermal Decomposition. Int. J. Mol. Sci. 2011, 12, 4365-4377.

AMA Style

Veranitisagul C, Kaewvilai A, Sangngern S, Wattanathana W, Suramitr S, Koonsaeng N, Laobuthee A. Novel Recovery of Nano-Structured Ceria (CeO2) from Ce(III)-Benzoxazine Dimer Complexes via Thermal Decomposition. International Journal of Molecular Sciences. 2011; 12(7):4365-4377.

Chicago/Turabian Style

Veranitisagul, Chatchai; Kaewvilai, Attaphon; Sangngern, Sarawut; Wattanathana, Worawat; Suramitr, Songwut; Koonsaeng, Nattamon; Laobuthee, Apirat. 2011. "Novel Recovery of Nano-Structured Ceria (CeO2) from Ce(III)-Benzoxazine Dimer Complexes via Thermal Decomposition." Int. J. Mol. Sci. 12, no. 7: 4365-4377.



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