Quantitative measurement of a mixture of mesophases cubic MCM-48 and hexagonal MCM-41 by 13C CP/MAS NMR.

• Main Authors: Nur, Hadi, Guan, Lau Chin, Endud, Salasiah, Hamdan, Halimaton
• Format: Article
• Language: English
• Published: Elsevier Science B.V. 2004
• Subjects: Q Science (General)
• Online Access: http://eprints.utm.my/id/eprint/7481/1/H_M_Hamdan_2004_Quantitative_Measurement_Of_A_Mixture.pdf; http://eprints.utm.my/id/eprint/7481/; http://dx.doi.org/10.1016/j.matlet.2003.12.012

Quantitative measurement of a mixture of cubic MCM-48 and hexagonal MCM-41 mesophases by means of 13C CP/MAS NMR was discussed. The synthesis of pure cubic MCM-48, pure hexagonal MCM-41 and mixed hexagonal-cubic phases were carried out via mixed cationic-neutral templating route. The result show that in a mixture of hexagonal-cubic phase the presence of MCM-48 at a certain level could not be identified by XRD due to the very weak reflections. The result also show that the technique can be applied to a wide range of mesoporous structures.