{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T01:01:29Z","timestamp":1791939689088,"version":"4.3.4"},"reference-count":62,"publisher":"Wiley","issue":"13","license":[{"start":{"date-parts":[[2009,2,6]],"date-time":"2009-02-06T00:00:00Z","timestamp":1233878400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2009,3,16]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:bold>Spinning wheels<\/jats:bold>: The presented highly resolved multifrequency continuous wave EPR spectra (e.g., see figure) of the heterooctametalic \u201cwheels\u201d Cr<jats:sub>7<\/jats:sub>M provide rare examples of high nuclearity polymetallic systems where detailed information on the spin\u2010Hamiltonian parameters of the ground and excited spin states is observed.<jats:boxed-text content-type=\"graphic\" position=\"anchor\"><jats:graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mimetype=\"image\/gif\" position=\"anchor\" specific-use=\"enlarged-web-image\" xlink:href=\"graphic\/mcontent.gif\"><jats:alt-text>magnified image<\/jats:alt-text><\/jats:graphic><\/jats:boxed-text><\/jats:p><jats:p>We present highly resolved multifrequency (X\u2010, K\u2010, Q\u2010 and W\u2010band) continous wave EPR spectra of the heterooctametalic \u201cwheels\u201d, [(CH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>NH<jats:sub>2<\/jats:sub>][Cr<jats:sup>III<\/jats:sup><jats:sub>7<\/jats:sub>M<jats:sup>II<\/jats:sup>F<jats:sub>8<\/jats:sub>((CH<jats:sub>3<\/jats:sub>)<jats:sub>3<\/jats:sub>CCOO)<jats:sub>16<\/jats:sub>], hereafter Cr<jats:sub>7<\/jats:sub>M, where M=Cd, Zn, Mn, and Ni. These experimental spectra provide rare examples of high nuclearity polymetallic systems where detailed information on the spin\u2010Hamiltonian parameters of the ground and excited spin states is observed. We interpret the EPR spectra by use of restricted size effective subspaces obtained by the rigorous solution of spin\u2010Hamiltonians of dimension up to 10<jats:sup>5<\/jats:sup> by use of the Davidson algorithm. We show that transferability of spin\u2010Hamiltonian parameters across complexes of the Cr<jats:sub>7<\/jats:sub>M family is possible and that the spin\u2010Hamiltonian parameters of Cr<jats:sub>7<\/jats:sub>M do not have sharply defined values, but are rather distributed around a mean value.<\/jats:p>","DOI":"10.1002\/chem.200801895","type":"journal-article","created":{"date-parts":[[2009,2,7]],"date-time":"2009-02-07T02:16:22Z","timestamp":1233972982000},"page":"3152-3167","source":"Crossref","is-referenced-by-count":84,"title":["EPR Spectroscopy of a Family of Cr<sup>III<\/sup><sub>7<\/sub>M<sup>II<\/sup> (M = Cd, Zn, Mn, Ni) \u201cWheels\u201d: Studies of Isostructural Compounds with Different Spin Ground States"],"prefix":"10.1002","volume":"15","author":[{"given":"Stergios","family":"Piligkos","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H\u00f8gni","family":"Weihe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eckhard","family":"Bill","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Neese","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hassane","family":"El\u2005Mkami","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graham\u2005M.","family":"Smith","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Collison","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gopalan","family":"Rajaraman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grigore\u2005A.","family":"Timco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard\u2005E.\u2005P.","family":"Winpenny","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric\u2005J.\u2005L.","family":"McInnes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,3,6]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic00200a018"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.3891\/acta.chem.scand.47-1154"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic970029c"},{"key":"e_1_2_6_5_2","unstructured":"\u00a0"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic00126a028"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jmr.2005.10.016"},{"key":"e_1_2_6_8_2","volume-title":"EPR of Exchange Coupled Systems","author":"Bencini A.","year":"1989"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/1521-3765(20010417)7:8<1796::AID-CHEM17960>3.0.CO;2-Y"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1140\/epjb\/e2003-00172-9"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.76.052407"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200390002"},{"key":"e_1_2_6_12_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200390034"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.67.094405"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.71.174407"},{"key":"e_1_2_6_15_2","unstructured":"\u00a0"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.63.184409"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.64.064419"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.66.014441"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.66.054409"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.1492796"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1140\/epjb\/e2003-00331-0"},{"key":"e_1_2_6_22_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.69.104432"},{"key":"e_1_2_6_23_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.70.104422"},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.72.094422"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0717921"},{"key":"e_1_2_6_26_2","unstructured":"\u00a0"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1016\/0021-9991(75)90065-0"},{"key":"e_1_2_6_28_2","unstructured":"B. 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