{"created":"2023-05-15T16:34:24.678182+00:00","id":6998,"links":{},"metadata":{"_buckets":{"deposit":"7cf04d28-dd27-41b0-b643-1571093dc96b"},"_deposit":{"created_by":2,"id":"6998","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"6998"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00006998","sets":["14:21"]},"author_link":["29592","29593"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2013-12-30","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"115","bibliographicPageStart":"105","bibliographicVolumeNumber":"114","bibliographic_titles":[{"bibliographic_title":"Electrochimica Acta"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We found that dibenzyl viologen (dBV) on an HOPG electrode undergoes a two-step first order faradaic phase transition at high concentrations of bromide ion (Br-). Results of voltammetric and electroreflectance measurements were used to describe the mechanism of the two-step transition processes. When [Br-] > 180 mM, the transition step at less negative potential was ascribed to a phase transition between a gas-like adsorption layer of dBV dication (dBV2+) and a mesophase of dBV radical cation (dBV+). Most likely, the mesophase is a two-dimensional (2D) ordered phase composed of co-adsorbed dBV+ and Br- where both are in direct contact with the HOPG surface. The transition step at more negative potential was ascribed to a phase transition between the dBV+ Br- mesophase and a 2D condensed phase of dBV+. In the condensed phase being denser than the mesophase, dBV+ molecules are π-stacked due to face-to-face interaction between bipyridinium radical cations. This transition step involves also a reduction process of dBV2+ to dBV+ followed by its incorporation into the condensed phase. The two-step transition was not observed in KCl solution of any concentration, either in KBr solution of [Br -] < 75 mM. Other viologens examined, including benzyl-heptyl viologen, did not exhibit such a two-step transition but single-step one. The nature of the transition, especially in the [Br-] range from 75 to 180 mM, was closely analyzed.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Electrochimica Acta, 114, pp.105-115; 2013","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier Limited"}]},"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.2013.09.168","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2013 Elsevier Ltd. All rights reserved."},{"subitem_rights":"NOTICE: this is the author’s version of a work that was accepted for publication in Electrochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochimica Acta, 114 (2013)"}]},"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":"Higashi, Tomohiro"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sagara, Takamasa"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-21"}],"displaytype":"detail","filename":"Supple.pdf","filesize":[{"value":"524.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Supple.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/6998/files/Supple.pdf"},"version_id":"d1bbf0dc-042b-4155-a1f9-5c7d685c728b"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-21"}],"displaytype":"detail","filename":"EleAct114_105.pdf","filesize":[{"value":"5.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"EleAct114_105.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/6998/files/EleAct114_105.pdf"},"version_id":"99e0f56b-fa82-432a-854a-a72a5976c6fa"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Anion effect","subitem_subject_scheme":"Other"},{"subitem_subject":"Electroreflectance","subitem_subject_scheme":"Other"},{"subitem_subject":"HOPG","subitem_subject_scheme":"Other"},{"subitem_subject":"Phase transition","subitem_subject_scheme":"Other"},{"subitem_subject":"Viologen","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":"Remarkable effect of bromide ion upon two-dimensional faradaic phase transition of dibenzyl viologen on an HOPG electrode surface: Emergence of two-step transition","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Remarkable effect of bromide ion upon two-dimensional faradaic phase transition of dibenzyl viologen on an HOPG electrode surface: Emergence of two-step transition"}]},"item_type_id":"2","owner":"2","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-12-20"},"publish_date":"2013-12-20","publish_status":"0","recid":"6998","relation_version_is_last":true,"title":["Remarkable effect of bromide ion upon two-dimensional faradaic phase transition of dibenzyl viologen on an HOPG electrode surface: Emergence of two-step transition"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T02:34:08.476301+00:00"}