{"id":7842,"date":"2016-02-15T15:52:21","date_gmt":"2016-02-15T15:52:21","guid":{"rendered":"http:\/\/vps468643.ovh.net.s216418.gridserver.com\/?p=7842"},"modified":"2016-02-15T15:52:21","modified_gmt":"2016-02-15T15:52:21","slug":"hard-soft-synthesis-of-srcro3%e2%88%92-%ce%b4-superstructure-phases","status":"publish","type":"post","link":"https:\/\/senngroup.com\/hard-soft-synthesis-of-srcro3%e2%88%92-%ce%b4-superstructure-phases\/","title":{"rendered":"\u201cHard\u2013Soft\u201d Synthesis of SrCrO3\u2212 \u03b4 Superstructure Phases"},"content":{"rendered":"<p><a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/ange.201206203\/full\">Hard-soft synthesis of SrCrO3-\u03b4 superstructure phases. Angel M. Ar\u00e9valo-L\u00f3pez, Jennifer A. Rodgers, Mark S. Senn, Falak Sher, James Farnham, William Gibbs, and J. Paul Attfield. Angew. Chem. Int. Ed. 124 (2012) 10949<\/a><\/p>\n<p>\u201cSoft\u201d reactions, which alter local chemistry and structure while retaining the basic lattice arrangement, are important for synthesizing solids with novel properties. For example, new layered oxides LaNiO2 and SrFeO2 were prepared by reduction of the corresponding perovskites at temperatures as low as 1908C.[3, 4] Precursors for \u201csoft\u201d chemistry are usually prepared at ambient pressure and sometimes under moderate gas pressures, for example, 10\u201330 MPa of oxygen gas was used to produce fully oxidized LaNiO3 and SrFeO3 perovskites for the latter reactions. \u201cHard\u201d high-pressure (1\u201320 GPa) conditions can lock instabilities, such as unusual oxidation states or coordination environments, into dense phases that are metastable when recovered to ambient conditions, thus leading to unusual properties, such as intermetallic charge transfer and negative thermal expansion in LaCu3Fe4O12 and BiNiO3. Hence, it is attractive to explore combined \u201chard\u2013soft\u201d routes to novel materials by partially relieving the instability of a high-pressure precursor through post-synthesis modification.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hard-soft synthesis of SrCrO3-\u03b4 superstructure phases. Angel M. Ar\u00e9valo-L\u00f3pez, Jennifer A. Rodgers, Mark S. Senn, Falak Sher, James Farnham, William Gibbs, and J. Paul Attfield. Angew. Chem. Int. Ed. 124<br \/><a href=\"https:\/\/senngroup.com\/hard-soft-synthesis-of-srcro3%e2%88%92-%ce%b4-superstructure-phases\/\" class=\"more\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":7843,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[64],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u201cHard\u2013Soft\u201d Synthesis of SrCrO3\u2212 \u03b4 Superstructure Phases - SENN GROUP<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/senngroup.com\/hard-soft-synthesis-of-srcro3\u2212-\u03b4-superstructure-phases\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u201cHard\u2013Soft\u201d Synthesis of SrCrO3\u2212 \u03b4 Superstructure Phases - SENN GROUP\" \/>\n<meta property=\"og:description\" content=\"Hard-soft synthesis of SrCrO3-\u03b4 superstructure phases. 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Angel M. Ar\u00e9valo-L\u00f3pez, Jennifer A. Rodgers, Mark S. Senn, Falak Sher, James Farnham, William Gibbs, and J. Paul Attfield. Angew. Chem. Int. 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