US EPA

4762284 

Journal Article 

Synthesis and characterization of a novel mesoporous Mn-organophosphate molecular sieve 

Venkatathri, N; Santhanaraj, D; Shanthi, K 

2011 

Yes 

Journal of the Indian Chemical Society
ISSN: 0019-4522 

88 

2 

225-230 

English 

WOS:000288232000008 

http://://WOS:000288232000008
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A novel mesoporous Mn-organophosphate was synthesized for the first time. It is characterized by several physicochemical techniques. Small angle X-ray diffraction analysis shows the first peak in 2.5 degrees with 39 angstrom pore width. Elemental analysis shows that the composition is [(C(12)H(23)N)(3)PO](40)Mn. Scanning electron microscopic picture shows the flag morphology with 1-15 mu m particle size. Thermogravimetry/Differential thermal analysis shows almost 80% exothermic weight loss. Nitrogen adsorption isotherm shows type III with 300 m(2)/g BET surface area. Fourier transform Infrared spectroscopic analysis shows that the framework vibrations are comparable to other well known silica mesoporous materials. Electron spin resonance spectroscopic analysis shows the absence of hyperfine splitting indicates the presence of Mn(3+) species. Ultraviolet-visible spectroscopic analysis shows that most of the Mn is in tetrahedral co-ordination beside small square: pyramidal species. A plausible synthesis mechanism also proposed. 

Mesoporous; Mn-organophosphate; characterization