geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

A new microporous zeolitic silicoborate (ITQ-52) with interconnected small and medium pores


, : A new microporous zeolitic silicoborate (ITQ-52) with interconnected small and medium pores. Journal of the American Chemical Society 136(9): 3342-3345

A new zeolite (named as ITQ-52) having large cavities and small and medium channels has been synthesized. This was achieved by using a new family of amino-phosphonium cations as organic structure directing agents (OSDA). These cations contain P-C and P-N bonds, and therefore they lie between previously reported P-containing OSDA, such as tetraalkylphosphonium and phosphazenes. In this study, it has been found that 1,4-butanediylbis[tris(dimethylamino)]phosphonium dication is a very efficient OSDA for crystallization of several zeolites, and in some particular conditions, the new zeolite ITQ-52 was synthesized as a pure phase. The structure of ITQ-52 has been solved using high-resolution synchrotron X-ray powder diffraction data of the calcined solid. This new zeolite crystallizes in the space group I2/m, with cell parameters a = 17.511 Å, b = 17.907 Å, c = 12.367 Å, and β = 90.22°. The topology of ITQ-52 can be described as a replication of a composite building unit with ring notation [4(3)5(4)6(1)] that gives rise to the formation of an interconnected 8R and 10R channel system.

US$19.90

PMID: 24456134

DOI: 10.1021/ja411915c


Other references

Singla, R.; Ganguli, A.; Ghosh, M.; Sohal, S., 2010: Evaluation of sanitizing efficacy of acetic acid on Piper betle leaves and its effect on antioxidant properties. The sanitizing efficacy of acetic acid and its effect on health beneficial properties of Piper betle leaves were determined. Betel leaves artificially inoculated with Aeromonas, Salmonella and Yersinia were subjected to organic acid (citric acid,...

Mallin, A.W., 1961: Trigeminal neuralgia in multiple sclerosis. Report of two cases and review of literature. Journal of the National Medical Association 53: 18-23

Zeuner, F.E., 1942: Localities and preservation of fossil insects. Proceedings of the Geologists' Association London, 53: 108-109

Gomes, P.; Soares D.S.lva, P., 1999: Apical L-DOPA-Na+ co-transport and intracellular pH in OK cells. FASEB Journal 13(4 PART 1): A395, March 12

Ploeg, J.D. van der, 1977: The stolen future; imperialism, land reform and farmers' struggles in Peru. This is a study of agrarian structure and land reform from the point of view of the communities of American Indian farmers in northern Peru - discussing the history of colonialism by German and Spanish entrepreneurs, the influence of the capitalis...

Tsutsumi, A.; Goldsby, D.; Harris, R.; Jiang, T.; Knuth, M.; Louis, L.; Curewitz, D., 2008: Physical properties measurements from IODP NanTroSEIZE Stage 1 Expedition 316. Japan Geoscience Union Meeting

Lee, J.Han.; Kim, S.Hee.; Cho, S.Hyun.; Kim, S.Ryong., 2008: Laparoscopic surgery of ectopic gestational sac implanted in the cesarean section scar. The feasibility and outcome of laparoscopic surgery for patients with ectopic pregnancy in the cesarean section scar was studied. From January 2003 to June 2007, 7 of 9 patients diagnosed with ectopic pregnancy in a previous cesarean section scar...

Karamanakos, P.N.; Trafalis, D.T.; Papachristou, D.J.; Panteli, E.S.; Papavasilopoulou, M.; Karatzas, A.; Kardamakis, D.; Nasioulas, G.; Marselos, M., 2017: Evidence for the efficacy of disulfiram and copper combination in glioblastoma multiforme - A propos of a case. Glioblastoma multiforme (GBM) is the most common and aggressive malignancy of the central nervous system. Treatment usually involves a combination of surgical resection, chemotherapy, and radiotherapy, but ultimately this condition is incurable. B...

Briski, K.P.; Sylvester, P.W., 2001: Co-distribution of Fos- and mu opioid receptor immunoreactivity within the rat septopreoptic area and hypothalamus during acute glucose deprivation: Effects of the mu receptor antagonist CTOP. Mu (mu) opioid receptors occur throughout the brain, but central sites where ligand neuromodulatory effects occur during glucopenia have not been identified. The present studies investigated whether septal, preoptic, and hypothalamic neurons that...

Sharma, R.B.; Talor, M.V.; Rose, N.R.; Burek, L.C., 2004: CTLA-4 regulation in NODH2h4 mice the role of indoleamine 2, 3-dioxygenase. NOD.H2h4 mice spontaneously develop autoimmune thyroiditis (AT) which is enhanced by dietary iodine. We investigated CTLA-4 signaling by administering anti-CTLA-4 monoclonal antibody (mAb) to iodine-fed NOD.H2h4 mice. It significantly enhanced aut...