{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T21:48:39Z","timestamp":1789940919011,"version":"4.0.1"},"reference-count":27,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2018,12,18]],"date-time":"2018-12-18T00:00:00Z","timestamp":1545091200000},"content-version":"am","delay-in-days":344,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#am"},{"start":{"date-parts":[[2018,1,8]],"date-time":"2018-01-08T00:00:00Z","timestamp":1515369600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100006999","name":"Nuclear Energy University Program","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100006999","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Magnetic Reson in Chemistry"],"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:p>Multinuclear solid\u2010state NMR and powder X\u2010ray diffraction data collected for phosphonate materials <jats:styled-content>Zr(O<jats:sub>3<\/jats:sub>PC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>PO<jats:sub>3<\/jats:sub>)\u2009\u00b7\u20093.6H<jats:sub>2<\/jats:sub>O<\/jats:styled-content> and <jats:styled-content>Sn(O<jats:sub>3<\/jats:sub>PC<jats:sub>6<\/jats:sub>H<jats:sub>4<\/jats:sub>PO<jats:sub>3<\/jats:sub>)<jats:sub>0.85<\/jats:sub>(O<jats:sub>3<\/jats:sub>POH)<jats:sub>0.30<\/jats:sub>\u00a0\u00b7\u00a03.09H<jats:sub>2<\/jats:sub>O<\/jats:styled-content> have resulted in the layered structure, where the phosphonic acids cross\u2010link the layers. The main structural motif (the 111 connectivity in the PO<jats:sub>3<\/jats:sub> group) has been established by determination of chemical shift anisotropy parameters for phosphorus nuclei in the phosphonate groups. An analysis of the variable\u2010temperature <jats:styled-content><jats:sup>31<\/jats:sup>P\u00a0T<jats:sub>1<\/jats:sub><\/jats:styled-content> measurements and the shapes of the phosphorus resonances in the <jats:styled-content><jats:sup>31<\/jats:sup>P<\/jats:styled-content> static NMR spectra have resulted in the dipolar mechanism of the phosphorus spin\u2010lattice relaxation, where the rotating phenylene rings reorient dipolar vectors P<jats:sup>\u2026<\/jats:sup>H as a driving force of the relaxation process. It has been found that water protons do not affect the <jats:styled-content><jats:sup>31<\/jats:sup>P\u00a0T<jats:sub>1<\/jats:sub><\/jats:styled-content> times. The activation energy of the phenylene rotation in both compounds has been determined as low as 12.5\u00a0kJ\/mol. The interpretation of the phosphorus relaxation data has been independently confirmed by the measurements of <jats:sup>1<\/jats:sup>H T<jats:sub>1<\/jats:sub> times for protons of the phenylene rings.<\/jats:p>","DOI":"10.1002\/mrc.4698","type":"journal-article","created":{"date-parts":[[2017,12,18]],"date-time":"2017-12-18T12:12:38Z","timestamp":1513599158000},"page":"276-284","source":"Crossref","is-referenced-by-count":15,"title":["Layered metal(<scp>IV<\/scp>) phosphonate materials: Solid\u2010state <scp><sup>1<\/sup>H, <sup>13<\/sup>C, <sup>31<\/sup>P NMR<\/scp> spectra and <scp>NMR<\/scp> relaxation"],"prefix":"10.1002","volume":"56","author":[{"given":"Javeed Ahmad","family":"Sheikh","sequence":"first","affiliation":[{"name":"Department of Chemistry Texas A&amp;M University  College Station TX 77845\u20103012 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5011-0385","authenticated-orcid":false,"given":"Vladimir I.","family":"Bakhmutov","sequence":"additional","affiliation":[{"name":"Laboratory for Nuclear Magnetic Resonance, Department of Chemistry Texas A&amp;M University  College Station TX 77842\u20103012 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abraham","family":"Clearfield","sequence":"additional","affiliation":[{"name":"Department of Chemistry Texas A&amp;M University  College Station TX 77845\u20103012 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,1,8]]},"reference":[{"key":"e_1_2_6_2_1","series-title":"Handbook Layered materials","first-page":"313","volume-title":"Layered \u03b1\u2010zirconium phosphates and phosphonates","author":"Kumar C. 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