{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T21:25:59Z","timestamp":1782854759545,"version":"3.54.5"},"reference-count":35,"publisher":"Royal Society of Chemistry (RSC)","issue":"19","license":[{"start":{"date-parts":[[2020,4,9]],"date-time":"2020-04-09T00:00:00Z","timestamp":1586390400000},"content-version":"am","delay-in-days":464,"URL":"http:\/\/rsc.li\/journals-terms-of-use"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["21671098"],"award-info":[{"award-number":["21671098"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["21731003"],"award-info":[{"award-number":["21731003"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["rsc.org"],"crossmark-restriction":true},"short-container-title":["Dalton Trans."],"abstract":"<p>\n                    \u03b1-Cu(4-cnappH)(H\n                    <sub>2<\/sub>\n                    O) (\n                    <bold>\u03b1-Cu-1<\/bold>\n                    ), \u03b1-Cu(4-cnappH)(H\n                    <sub>2<\/sub>\n                    O)\u00b70.5H\n                    <sub>2<\/sub>\n                    O (\n                    <bold>\u03b1-Cu-2<\/bold>\n                    ) and \u03b2-Cu(4-cnappH)(H\n                    <sub>2<\/sub>\n                    O) (\n                    <bold>\u03b2-Cu<\/bold>\n                    ) [4-cnappH\n                    <sub>3<\/sub>\n                    = (4-carboxynaphthalen-1-yl)phosphonic acid] are polymorphic layered compounds. Proton conduction is more favorable in\n                    <bold>\u03b1-Cu-2<\/bold>\n                    than in\n                    <bold>\u03b1-Cu-1<\/bold>\n                    , but exfoliation into nanosheets decreases the conductivity.\n                  <\/p>","DOI":"10.1039\/c9dt00970a","type":"journal-article","created":{"date-parts":[[2019,4,8]],"date-time":"2019-04-08T20:04:16Z","timestamp":1554753856000},"page":"6539-6545","update-policy":"https:\/\/doi.org\/10.1039\/rsc_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Polymorphic layered copper phosphonates: exfoliation and proton conductivity studies"],"prefix":"10.1039","volume":"48","author":[{"given":"Bei","family":"Liu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing-Cui","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Shen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian-Shen","family":"Feng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Song-Song","family":"Bao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4437-1105","authenticated-orcid":false,"given":"Li-Min","family":"Zheng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry"},{"name":"School of Chemistry and Chemical Engineering"},{"name":"Collaborative Innovation Center of Advanced Microstructures"},{"name":"Nanjing University"},{"name":"Nanjing 210023"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"292","published-online":{"date-parts":[[2019]]},"reference":[{"key":"C9DT00970A-(cit1)\/*[position()=1]","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1038\/nmat1849","volume":"6","author":"Geim","year":"2007","journal-title":"Nat. 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