{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T11:29:22Z","timestamp":1789903762691,"version":"4.0.1"},"reference-count":36,"publisher":"Wiley","issue":"22","license":[{"start":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T00:00:00Z","timestamp":1775606400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T00:00:00Z","timestamp":1775606400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001711","name":"Schweizerischer Nationalfonds zur F\u00f6rderung der Wissenschaftlichen Forschung","doi-asserted-by":"publisher","award":["225147"],"award-info":[{"award-number":["225147"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2026,5,25]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The sustainable recovery of precious metals is critical for securing strategic resources while reducing the environmental footprint of mining. Among these, the selective recovery of gold from electronic waste represents a particularly attractive yet challenging target. Herein, we report the synthesis of phenazine\u2010based porous tetraoxa[8]circulene, PpTOC, incorporating heterocyclic crown ether moieties for efficient gold capture. The PpTOC combines a high surface area over 1200 m\n                    <jats:sup>2<\/jats:sup>\n                    g\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    with aza\u2010crown ether\u2010like cavities and high heteroatom content, enabling high gold uptake capacities of up to 860\u00a0mg g\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    under acidic conditions. Importantly, the polymer demonstrates selective recovery of gold from electronic waste even in the presence of high concentrations of competing metal ions such as copper. The recovered material, containing a mixture of Au(III), Au(I), and Au(0) species, has been directly employed as a heterogeneous catalyst in a sequential alkylation\u2013annulation reaction. Critically, switching from aprotic toluene to protic ethanol redirects the reaction outcome from alkylation to annulation, enabling divergent product selectivity using the\u00a0same heterogeneous catalyst\u00a0simply by changing the solvent.\n                  <\/jats:p>","DOI":"10.1002\/anie.6586260","type":"journal-article","created":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T04:26:07Z","timestamp":1775708767000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Porous Phenazine\u2010bridged Tetraoxa[8]Circulenes for Selective Gold Recovery and Heterogeneous Catalysis"],"prefix":"10.1002","volume":"65","author":[{"given":"Patrick W.","family":"Fritz","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Fribourg  Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eyl\u00fcl","family":"Attar","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Fribourg  Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timur","family":"Ashirov","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Fribourg  Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Krzysztof","family":"Piech","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Fribourg  Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4760-1546","authenticated-orcid":false,"given":"Ali","family":"Coskun","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Fribourg  Fribourg 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