Abstract
For medical purposes, materials are required that store and target specifically deliver exogenous nitric oxide (NO). Partially zinc-exchanged Na-LTA (Linde type A) zeolite (Zn-LTA) has high potential in this respect due to its non-toxicity and adsorption capacity for NO. In contrast to NO adsorbed to LTA zeolites prepared for catalytic purposes, lower dehydration temperature prior to NO adsorption is used to achieve a balance between production cost and high activity. In order to study the interaction of NO with the metal sites in the samples prepared under these medical conditions, continuous-wave X-band electron paramagnetic resonance has been applied. In contrast to Na-LTA with only one weakly interacting NO monomer, three different monomers, having stronger interaction to the metal sites than in Na-LTA, were observed in Zn-LTA. To improve the storage capacity of Zn-LTA, higher dehydration temperatures would be necessary.
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References
T. Nagano, T. Yoshimura, Chem. Rev. 102, 1235–1270 (2002)
S. Moncada, R.M.J. Palmer, E.A. Higgs, Pharmacol. Rev. 43, 109–142 (1991)
L.K. Keefer, Nat. Mater. 2, 357–358 (2003)
For more information on structure and nomenclature of zeolites, visit the International Zeolite Association website: www.iza-online.org
R.E. Morris, P.E. Wheatley, Angew. Chem. Int. Ed. 47, 4966–4981 (2008)
H. Yahiro, M. Iwamoto, Appl. Catal. A 222, 163–181 (2001)
P.S. Wheatley, A.R. Butler, M.S. Crane, S. Fox, B. Xiao, A.G. Rossi, I.L. Megson, R.E. Morris, J. Am. Chem. Soc. 128, 502–509 (2006)
P.S. Wheatley, A.C. McKinlay, R.E. Morris, Zeolites and related materials: trends, targets and challenges, in Proceedings of 4th International FEZA Conference, Paris, France, 2–6 Sept (2008)
W.X. Zhang, H. Yahiro, M.J. Iwamoto, J. Chem. Soc. Faraday Trans. 91, 767–771 (1995)
H. Yahiro, A. Lund, M. Shiotani, Spectrochim. Acta A 60, 1267–1278 (2004)
D. Goldfarb, Phys. Chem. Chem. Phys. 8, 2325–2343 (2006)
H. Yahiro, K. Kurohagi, G. Okada, Y. Itagaki, M. Shiotani, A. Lund, Phys. Chem. Chem. Phys. 4, 4255–4259 (2002)
T. Rudolf, A. Pöppl, W. Hofbauer, D. Michel, Phys. Chem. Chem. Phys. 3, 2167–2173 (2001)
V. Umamaheswari, M. Hartmann, A. Pöppl, J. Phys. Chem. B 109, 19723–19731 (2005)
P.H. Kasai, R.M. Gaura, J. Phys. Chem. 86, 4257–4260 (1982)
D. Biglino, M. Bonora, A. Volodin, A. Lund, Chem. Phys. Lett. 349, 511–516 (2001)
A. Pöppl, T. Rudolf, P. Manikandan, D. Goldfarb, J. Am. Chem. Soc. 122, 10194–10200 (2000)
T. Rudolf, A. Pöppl, W. Brunner, D. Michel, Magn. Reson. Chem. 37, 93–99 (1999)
H. Yahiro, A. Lund, A. Roland, N.P. Benetis, M. Shiotani, J. Phys. Chem. A 104, 7950–7956 (2000)
T.C. James, R.J. Thibault, J. Chem. Phys. 41, 2806–2813 (1964)
D. Biglino, H. Li, R. Erickson, A. Lund, H. Yahiro, M. Shiotani, Phys. Chem. Chem. Phys. 1, 2887–2896 (1999)
P.H. Kasai, R.J. Bishop Jr., J. Am. Chem. Soc. 94, 5560–5566 (1972)
D. Biglino, H. Li, R. Erickson, A. Lund, H. Yahiro, M. Shiotani, Phys. Chem. Chem. Phys. 1, 2887–2896 (1999)
L.B. McCusker, K. Seff, J. Phys. Chem. 85, 405–410 (1981)
Y. Kim, K. Seff, J. Phys. Chem. 84, 2823–2827 (2009)
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The financial support of the German Research Foundation (DFG, SCHI 531/5-2) and of the Engineering and Physical Sciences Research Council is gratefully acknowledged.
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Pal, C., Wheatley, P.S., Mkami, H.E. et al. EPR on Medically Relevant NO Adsorbed to Zn-LTA. Appl Magn Reson 37, 619–627 (2010). https://doi.org/10.1007/s00723-009-0071-x
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DOI: https://doi.org/10.1007/s00723-009-0071-x