Suchergebnisse

[EN] A multinuclear NMR has been carried out to elucidate the mechanism of action of CC3-R box-type chiral materials for the separation of enantiomers, supported by theoretical calculations. The potential of these materials to be used as chiral resolution agents through NMR is evidence in this study. ; Program Severo Ochoa SEV-2016-0683 is gratefully acknowledged. S.S-F. thanks MEC for his Severo Ochoa Grant SPV-2013-067884, P.O.-B. thanks MEC for his Ramon y Cajal contract RYC-2014-16620. M.B. and F.R. thank the financial support by the Spanish Government (MAT2017-82288-C2-1-P and MAT2015-71842-P). The authors thank the MULTY2-HYCAT (EU-Horizon 2020 funded project under grant agreement no. 720783). The Electron Microscopy Service of the UPV is acknowledged for their help in sample characterization. ; Saez-Ferre, S.; Boronat Zaragoza, M.; Cantin Sanz, A.; Rey Garcia, F.; Oña-Burgos, P. (2018). Elucidation of the Interaction Mechanism between Organic Chiral Cages with Biomolecules through Nuclear Magnetic Resonance and Theoretical Studies. The Journal of Physical Chemistry C. 122(29):16821-16829. https://doi.org/10.1021/acs.jpcc.8b05069 ; S ; 16821 ; 16829 ; 122 ; 29

This is the peer reviewed version of the following article: Chem. Eur. J. 2019, 25, 16390 16396 , which has been published in final form at https://doi.org/10.1002/chem.201904043. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. ; [EN] Expanding the previously known family of -onium (ammonium, phosphonium, and sulfonium) organic structure-directing agents (OSDAs) for the synthesis of zeolite MFI, a new member, the arsonium cation, is used for the first time. The new group of tetraalkylarsonium cations has allowed the synthesis of the zeolite ZSM-5 with several different chemical compositions, opening a route for the synthesis of zeolites with a new series of OSDA. Moreover, the use of As replacing N in the OSDA allows the introduction of probe atoms that facilitate the study of these molecules by powder X-ray diffraction (PXRD), solid-state nuclear magnetic resonance (MAS NMR), and X-ray absorption spectroscopy (XAS). Finally, the influence of trivalent elements such as B, Al, or Ga isomorphically replacing Si atoms in the framework structure and its interaction with the As species has been studied. The suitability of the tetraalkylarsonium cation for carrying out the crystallization of zeolites is demonstrated along with the benefit of the presence of As atoms in the occluded OSDA, which allows its advanced characterization as well as the study of its evolution during OSDA removal by thermal treatments. ; Program Severo Ochoa SEV-2016-0683 and Maria de Maeztu MDM-2015-0538 are gratefully acknowledged. S.S-F. thanks MEC for his Severo Ochoa Grant SPV-2013-067884, P.O.-B. and G.M.E. thank MEC for his Ramon y Cajal contracts (RYC-2014-16620 and RYC-2013-14386). The authors thank the financial support by the Spanish Government (RTI2018-096399-A-I00, RTI2018-101784-B-I00 and CTQ2017-89528-P) and the Generalitat Valeciana (PROMETEO/2017/066). The Electron Microscopy Service of the UPV is acknowledged for their help in sample characterization. We ...