{"created":"2023-05-15T14:51:29.178658+00:00","id":70380,"links":{},"metadata":{"_buckets":{"deposit":"091b9557-a0af-4fdc-b536-a5de35a3c478"},"_deposit":{"created_by":1,"id":"70380","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"70380"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00070380","sets":["10:28"]},"author_link":["691086","691088","691089","691090","691091","691087"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2010-12-20","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Superoxide ion (O2•–) forms a stable 1:1 complex with scandium hexamethylphosphoric triamide complex [Sc(HMPA)33+], which can be detected by ESR spectroscopy in solution at ambient temperature.  We report kinetics and mechanism of electron-transfer reactions from the O2•––Sc(HMPA)33+ complex to a series of electron acceptors:  p-benzoquinone derivatives such as p-benzoquinone and coenzyme Q10.  Electron transfer from the O2•––Sc(HMPA)33+ complex to a series of p-benzoquinone derivatives occurs, accompanied by binding of Sc(HMPA)33+ to the corresponding semiquinone radical anion complex to produce the semiquinone radical anion-Sc(HMPA)33+ complexes.  The 1:1 and 1:2 complexes between semiquinone radical anions and Sc(HMPA)33+ depending on the type of semiquinone radical anions were detected by ESR measurements.  This is defined as Sc(HMPA)33+-coupled electron transfer.  There are two reaction pathways in the Sc(HMPA)33+-coupled electron transfer.  One is a stepwise pathway in which the binding of Sc(HMPA)33+ to semiquinone radical anions occurs after the electron transfer, when the rate of electron transfer remains constant with the change in concentration of Sc(HMPA)33+.  The other is a concerted pathway in which electron transfer and the binding of Sc(HMPA)33+ occurs in a concerted manner, when the rates of electron transfer exhibit first-order and second-order dependence on concentration of Sc(HMPA)33+ depending the number of Sc(HMPA)33+ (one and two) bound to semiquinone radical anions.   The contribution of two pathways is changed depending on substituents on p-benzoquinone derivatives.  The present study provides the first example to clarify the kinetics and mechanism of metal ion-coupled electron-transfer reactions of superoxide ion.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"The 2010 International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2010)","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kawashima, Tomonori"}],"nameIdentifiers":[{"nameIdentifier":"691086","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ohkubo, Kei"}],"nameIdentifiers":[{"nameIdentifier":"691087","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Nakanishi, Ikuo"}],"nameIdentifiers":[{"nameIdentifier":"691088","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Fukuzumi, Shunichi"}],"nameIdentifiers":[{"nameIdentifier":"691089","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"川島 知憲","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"691090","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"中西 郁夫","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"691091","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Two Pathways in Scandium Ion-Coupled Electron Transfer of Superoxide Ion","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Two Pathways in Scandium Ion-Coupled Electron Transfer of Superoxide Ion"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2011-01-05"},"publish_date":"2011-01-05","publish_status":"0","recid":"70380","relation_version_is_last":true,"title":["Two Pathways in Scandium Ion-Coupled Electron Transfer of Superoxide Ion"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T20:03:36.481332+00:00"}