{"created":"2023-05-15T16:49:21.103127+00:00","id":26769,"links":{},"metadata":{"_buckets":{"deposit":"012e17f9-18f1-4371-8728-db81b7b49519"},"_deposit":{"created_by":6,"id":"26769","owners":[6],"pid":{"revision_id":0,"type":"depid","value":"26769"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00026769","sets":["14:21"]},"author_link":["118577","118578"],"item_2_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"A historical overview of studies on the structures of phenolphthalein"}]},"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"75","bibliographicPageStart":"65","bibliographicVolumeNumber":"28","bibliographic_titles":[{"bibliographic_title":"技術･教育研究論文誌"},{"bibliographic_title":"Journal of Technology and Education","bibliographic_titleLang":"en"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Phenolphthalein, one of the well-known acid-base indicators commonly used in chemical education and analytical technology, has various applications in industry, such as in carbonation testing on concrete. Previously, its structural changes in different pH solutions have remain somewhat unclear, and, regrettably, there has been no review article dealing with that. In this historical overview, I describe the details, including its confusion. Phenolphthalein, noted as H2PP, is a diprotic acid that dissociates H+, producing HPP– and PP2–. HPP– has a structure of the lactone-ring and, possibly, ring-opened carboxylate. Around the 1940s, due to a misunderstanding of resonance theory, ring-opened HPP– was commonly accepted; however, after the 1980s, probably to avoid the complexity, the representation of HPP– itself tended to be ignored. By contrast, before the 1980s, PP2– was consistently shown only as a ring-opened form. After that, however, it was understood that some PP2– could exist as a ring-closed structure in a solution and a solid state because of the strength of the lactone ring as compared with the sulfophthalein dyes. Although inclusion compounds, with PP2– with β-cyclodextrin and a metal complex, were reported, their X-ray crystal analyses have not yet been reported. Since the idea of PP2– as a lactone form seems not to have been accepted commonly yet, it would be helpful to compare it with research in clathrate chemistry, where ring-closed PP2– is widely known.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"技術･教育研究論文誌, 28(2), pp.65-75, 2021","subitem_description_type":"Other"}]},"item_2_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"118578","nameIdentifierScheme":"WEKO"}],"names":[{"name":"NOGUCHI, Daisuke"}]}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"技術・教育研究会"}]},"item_2_relation_42":{"attribute_name":"関係URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"http://bigjohn.ce.fukui-nct.ac.jp/journal/index.htm"}]}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c2021 技術・教育研究会"}]},"item_2_text_62":{"attribute_name":"出版者別言語","attribute_value_mlt":[{"subitem_text_value":"The Association of Technology and Education"}]},"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_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"野口, 大介"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2021-10-12"}],"displaytype":"detail","filename":"JTE_282_65.pdf","filesize":[{"value":"700.3 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"JTE_282_65.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/26769/files/JTE_282_65.pdf"},"version_id":"97c8f9e3-ba5a-49e2-a678-18ded4239bdb"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"acid-base indicator","subitem_subject_scheme":"Other"},{"subitem_subject":"chemical structure","subitem_subject_scheme":"Other"},{"subitem_subject":"lactone","subitem_subject_scheme":"Other"},{"subitem_subject":"triphenylmethane dye","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"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":"フェノールフタレインの構造研究の歩み","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"フェノールフタレインの構造研究の歩み"}]},"item_type_id":"2","owner":"6","path":["21"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-10-12"},"publish_date":"2021-10-12","publish_status":"0","recid":"26769","relation_version_is_last":true,"title":["フェノールフタレインの構造研究の歩み"],"weko_creator_id":"6","weko_shared_id":-1},"updated":"2023-05-15T20:12:11.936882+00:00"}