{"created":"2023-05-15T16:30:21.672052+00:00","id":1457,"links":{},"metadata":{"_buckets":{"deposit":"2e93e37c-a38e-4228-bae1-57649d5487ae"},"_deposit":{"created_by":2,"id":"1457","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"1457"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00001457","sets":["14:21"]},"author_link":["6932","6933"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-02-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"223","bibliographicPageStart":"215","bibliographicVolumeNumber":"295","bibliographic_titles":[{"bibliographic_title":"Electrochimica Acta"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Redox reactions of highly water-soluble bis-viologens were examined at Au electrodes using ultra-micro electrode steady state voltammetry and electroreflectance methods in addition to conventional voltammetry. A bulk UV-vis absorption spectral approach was also used. Alkane-1,n-diyl bis-viologens appeared as a class of prototypical electroactive molecule possessing two equivalent redox centers; they undergo two-consecutive one-electron transfer processes. When intramolecular dimerization takes place immediately after accepting the second electron to produce a form having two viologen radical cation (V•+) sites in one molecule, the second reduction potential may be more positive than the first one. This redox potential inversion is caused by strong tendency to form a stable intramolecular π−π stacking between the two V•+ sites. The redox potential inversion of a highly water-soluble bis-viologen with a butane-1,4-diyl linkage was quantitatively obtained to be 116 mV (E1 – E2 = -116 mV). In contrast, the bis-viologen with an ethane-1,2-diyl linkage exhibited no dimerization below 0.2 mM, and its second redox potential was found to at 63 mV more negative than the first (E1 – E2 = 63 mV), highlighting repulsive interaction. The value of E1 – E2 = -116 mV for the bis-viologen with a butane-1,4-diyl linkage corresponds to the attractive interaction energy in the redox process of 5.9 kBT of room temperature; this value is apparently the same as the dimerization Gibbs free energy of methyl viologen in water.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Electrochimica Acta, 295, pp.215-223; 2019","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier Ltd."}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.electacta.2018.10.052","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00134686","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Sagara, Takamasa"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Eguchi, Hitomi"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2021-02-01"}],"displaytype":"detail","filename":"EleAct295_215.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"EleAct295_215.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/1457/files/EleAct295_215.pdf"},"version_id":"856e15db-6546-4de2-b9e6-15979ea43a98"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"bis-viologen","subitem_subject_scheme":"Other"},{"subitem_subject":"dimerization","subitem_subject_scheme":"Other"},{"subitem_subject":"two-consecutive one-electron transfer","subitem_subject_scheme":"Other"},{"subitem_subject":"electroreflectance","subitem_subject_scheme":"Other"},{"subitem_subject":"ultra-micro electrode","subitem_subject_scheme":"Other"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Revisiting aqueous redox process of alkyl-linked bis-viologen: Evaluation of redox potential inversion","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Revisiting aqueous redox process of alkyl-linked bis-viologen: Evaluation of redox potential inversion"}]},"item_type_id":"2","owner":"2","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2020-12-18"},"publish_date":"2020-12-18","publish_status":"0","recid":"1457","relation_version_is_last":true,"title":["Revisiting aqueous redox process of alkyl-linked bis-viologen: Evaluation of redox potential inversion"],"weko_creator_id":"2","weko_shared_id":2},"updated":"2023-05-15T23:01:11.537291+00:00"}