{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T12:25:44Z","timestamp":1788265544410,"version":"build-2803163510"},"reference-count":63,"publisher":"Wiley","issue":"33","license":[{"start":{"date-parts":[[2025,11,29]],"date-time":"2025-11-29T00:00:00Z","timestamp":1764374400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2025,11,29]],"date-time":"2025-11-29T00:00:00Z","timestamp":1764374400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008048","name":"Nanjing University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100008048","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2026,9,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Biological systems adapt their conformations and reactivities in response to diverse external cues, inspiring the development of synthetic materials with similar responsiveness for controlled chemical transformations. Here we report a flexible coordination polymer, [{Cd\n                    <jats:sub>4<\/jats:sub>\n                    (OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010BPEB)\n                    <jats:sub>4<\/jats:sub>\n                    (OBA)\n                    <jats:sub>4<\/jats:sub>\n                    }\u00b77DEF]\n                    <jats:sub>n<\/jats:sub>\n                    (\n                    <jats:bold>CP1<\/jats:bold>\n                    , OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010BPEB = 4,4'\u2010((1\n                    <jats:italic>E<\/jats:italic>\n                    ,1'\n                    <jats:italic>E<\/jats:italic>\n                    )\u2010(2,5\u2010dimethoxyl\u20101,4\u2010phenylene)bis(ethene\u20102,1\u2010diyl))dipyridine, H\n                    <jats:sub>2<\/jats:sub>\n                    OBA = 4,4'\u2010oxybis(benzoic acid), DEF =\n                    <jats:italic>N<\/jats:italic>\n                    ,\n                    <jats:italic>N<\/jats:italic>\n                    \u2010diethylformamide), capable of multistimuli\u2010induced restructuring of otherwise inactive olefinic bond pairs to achieve regioselective [2+2] photocycloadditions. Sequence exposure to solvent vapours and visible light drives stepwise structural transformations, producing two monocyclobutane isomers\u20144,4'\u2010((1\n                    <jats:italic>S<\/jats:italic>\n                    ,3\n                    <jats:italic>R<\/jats:italic>\n                    )bis(2,5\u2010dimethoxyl\u20104\u2010((\n                    <jats:italic>E<\/jats:italic>\n                    )\u20102\u2010(pyridin\u20104\u2010yl)vinyl)phenyl)cyclobutane\u20101,2\u2010diyl)dipyridine (OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010PCDP) and 4,4'\u2010((1\n                    <jats:italic>R<\/jats:italic>\n                    ,2\n                    <jats:italic>R<\/jats:italic>\n                    ,3\n                    <jats:italic>S<\/jats:italic>\n                    ,4\n                    <jats:italic>S<\/jats:italic>\n                    )\u20102,4\u2010bis(2,5\u2010dimethoxy\u20104\u2010((\n                    <jats:italic>E<\/jats:italic>\n                    )\u20102\u2010(pyridin\u20104\u2010yl)vinyl)phenyl)cyclobutane\u20101,3\u2010diyl)dipyridine, (2,4\u2010OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010PCDP)\u2014from their respective photoirradiated derivatives [{Cd\n                    <jats:sub>4<\/jats:sub>\n                    (OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010PCDP)\n                    <jats:sub>2<\/jats:sub>\n                    (OBA)\n                    <jats:sub>4<\/jats:sub>\n                    }\u00b73DEF]\n                    <jats:sub>n<\/jats:sub>\n                    (\n                    <jats:bold>CP2<\/jats:bold>\n                    ) and [{Cd\n                    <jats:sub>4<\/jats:sub>\n                    (2,4\u2010OCH\n                    <jats:sub>3<\/jats:sub>\n                    \u2010PCDP)\n                    <jats:sub>2<\/jats:sub>\n                    (OBA)\n                    <jats:sub>4<\/jats:sub>\n                    }\u00b73MeOH]\n                    <jats:sub>n<\/jats:sub>\n                    (\n                    <jats:bold>CP3<\/jats:bold>\n                    , MeOH = methanol). Single\u2010crystal X\u2010ray diffraction captures five intermediate structures, and density functional theory (DFT) calculations elucidate how stimuli\u2010mediated realignment of olefinic pairs dictates regioselectivity. This work demonstrates precise photochemical cyclobutane synthesis within a coordination polymer single\u2010crystal platform, offering mechanistic insights applicable to the broader design of stimuli\u2010controlled photoreactions and functional materials.\n                  <\/jats:p>","DOI":"10.1002\/chem.202502830","type":"journal-article","created":{"date-parts":[[2025,11,30]],"date-time":"2025-11-30T04:53:02Z","timestamp":1764478382000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dynamic Olefinic Bond Restructuring in Coordination Polymers Enables Precision Photocycloaddition"],"prefix":"10.1002","volume":"32","author":[{"given":"Qiaoqiao","family":"Zhang","sequence":"first","affiliation":[{"name":"College of Chemistry Chemical Engineering and Materials Soochow University  Suzhou P. R. China"},{"name":"State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences  Shanghai P. R. China"},{"name":"State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University  Nanjing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Chemistry Chemical Engineering and Materials Soochow University  Suzhou P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin\u2010Yi","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Chemistry Chemical Engineering and Materials Soochow University  Suzhou P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuai","family":"Yuan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University  Nanjing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2942-7385","authenticated-orcid":false,"given":"Jian\u2010Ping","family":"Lang","sequence":"additional","affiliation":[{"name":"College of Chemistry Chemical Engineering and Materials Soochow University  Suzhou P. R. China"},{"name":"State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences  Shanghai P. R. China"},{"name":"State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University  Nanjing P. R. 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