{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T01:57:46Z","timestamp":1791079066965,"version":"4.1.0"},"reference-count":62,"publisher":"Wiley","issue":"34","license":[{"start":{"date-parts":[[2010,7,23]],"date-time":"2010-07-23T00:00:00Z","timestamp":1279843200000},"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":[[2010,9,10]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We report the synthesis of the novel heterometallic complex [Fe<jats:sub>3<\/jats:sub>Cr(L)<jats:sub>2<\/jats:sub>(dpm)<jats:sub>6<\/jats:sub>]\u22c5Et<jats:sub>2<\/jats:sub>O (<jats:bold>Fe<jats:sub>3<\/jats:sub>CrPh<\/jats:bold>) (Hdpm=dipivaloylmethane, H<jats:sub>3<\/jats:sub>L=2\u2010hydroxymethyl\u20102\u2010phenylpropane\u20101,3\u2010diol), obtained by replacing the central iron(III) atom by a chromium(III) ion in an Fe<jats:sub>4<\/jats:sub> propeller\u2010like single\u2010molecule magnet (SMM). Structural and analytical data, high\u2010frequency EPR (HF\u2010EPR) and magnetic studies indicate that the compound is a solid solution of chromium\u2010centred Fe<jats:sub>3<\/jats:sub>Cr (<jats:italic>S<\/jats:italic>=6) and Fe<jats:sub>4<\/jats:sub> (<jats:italic>S<\/jats:italic>=5) species in an 84:16 ratio. Although SMM behaviour is retained, the |<jats:italic>D|<\/jats:italic> parameter is considerably reduced as compared with the corresponding tetra\u2010iron(III) propeller (<jats:italic>D<\/jats:italic>=\u22120.179 vs. \u22120.418\u2005cm<jats:sup>\u22121<\/jats:sup>), and results in a lower energy barrier for magnetisation reversal (<jats:italic>U<\/jats:italic><jats:sub>eff<\/jats:sub>\/<jats:italic>k<\/jats:italic><jats:sub>B<\/jats:sub>=7.0 vs. 15.6\u2005K). The origin of magnetic anisotropy in <jats:bold>Fe<jats:sub>3<\/jats:sub>CrPh<\/jats:bold> has been fully elucidated by preparing its Cr\u2010 and Fe\u2010doped Ga<jats:sub>4<\/jats:sub> analogues, which contain chromium(III) in the central position (c) and iron(III) in two magnetically distinct peripheral sites (p1 and p2). According to HF\u2010EPR spectra, the Cr and Fe dopants have hard\u2010axis anisotropies with <jats:italic>D<\/jats:italic><jats:sub>c<\/jats:sub>=0.470(5)\u2005cm<jats:sup>\u22121<\/jats:sup>, <jats:italic>E<\/jats:italic><jats:sub>c<\/jats:sub>=0.029(1)\u2005cm<jats:sup>\u22121<\/jats:sup>, <jats:italic>D<\/jats:italic><jats:sub>p1<\/jats:sub>=0.710(5)\u2005cm<jats:sup>\u22121<\/jats:sup>, <jats:italic>E<\/jats:italic><jats:sub>p1<\/jats:sub>=0.077(3)\u2005cm<jats:sup>\u22121<\/jats:sup>, <jats:italic>D<\/jats:italic><jats:sub>p2<\/jats:sub>=0.602(5)\u2005cm<jats:sup>\u22121<\/jats:sup>, and <jats:italic>E<\/jats:italic><jats:sub>p2<\/jats:sub>=0.101(3)\u2005cm<jats:sup>\u22121<\/jats:sup>. Inspection of projection coefficients shows that contributions from dipolar interactions and from the central chromium(III) ion cancel out almost exactly. As a consequence, the easy\u2010axis anisotropy of <jats:bold>Fe<jats:sub>3<\/jats:sub>CrPh<\/jats:bold> is entirely due to the peripheral, hard\u2010axis\u2010type iron(III) ions, the anisotropy tensors of which are necessarily orthogonal to the threefold molecular axis. A similar contribution from peripheral ions is expected to rule the magnetic anisotropy in the tetra\u2010iron(III) complexes currently under investigation in the field of molecular spintronics.<\/jats:p>","DOI":"10.1002\/chem.201001040","type":"journal-article","created":{"date-parts":[[2010,7,23]],"date-time":"2010-07-23T11:51:25Z","timestamp":1279885885000},"page":"10482-10493","source":"Crossref","is-referenced-by-count":54,"title":["Slow Magnetic Relaxation from Hard\u2010Axis Metal Ions in Tetranuclear Single\u2010Molecule Magnets"],"prefix":"10.1002","volume":"16","author":[{"given":"Erik","family":"Tancini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Jesus","family":"Rodriguez\u2010Douton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lorenzo","family":"Sorace","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne\u2010Laure","family":"Barra","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberta","family":"Sessoli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Cornia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2010,7,23]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1093\/acprof:oso\/9780198567530.001.0001"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja068961m"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0736616"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1007\/430_029"},{"key":"e_1_2_6_6_2","unstructured":"\u00a0"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1038\/nmat2133"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic8013283"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1038\/nmat1349"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1209\/0295-5075\/89\/18003"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1038\/nmat2374"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1039\/B916895H"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/smll.200801594"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/1521-3765(20010702)7:13<2765::AID-CHEM2765>3.0.CO;2-8"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja0576381"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1021\/cm703561c"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200900483"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo01103a627"},{"key":"e_1_2_6_19_2","first-page":"378","volume-title":"Vogel Analisi Chimica Quantitativa","author":"Jeffery J. 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