{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T07:00:27Z","timestamp":1790838027784,"version":"4.1.0"},"reference-count":40,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    A series of four differently substituted nonsymmetrical dithienylethene (DTE) units integrating bipyridine units and the corresponding cyclometalated iridium complexes were synthesized. All derivatives underwent typical reversible photoswitching reactions in solution and when embedded in polymer matrices. However, the fatigue resistance to multicycle switching in free ligands proved to be highly substituent dependent, with the benzothiophene and bipyridine substituted variant proving most stable. Interestingly, in all cases, fatigue resistance over many photoswitching cycles proved very high for all the iridium\u2010containing species studied (&gt;99% recovery in solution). Time\u2010resolved spectroscopic studies indicate a different ring\u2010closing reaction mechanism, passing through the\n                    <jats:sup>3<\/jats:sup>\n                    MLCT state in the organometallic species compared to the free ligand. Additionally, an inversion of photoresponse is observed: irradiation at 390\u2013440\u00a0nm promotes photocycloreversion in the free ligands but induces photocyclization in the iridium complexes. This contrasting behavior, combined with the associated optical changes, supports the potential of these systems for applications in information storage, data encryption, and anti\u2010counterfeiting.\n                  <\/jats:p>","DOI":"10.1002\/chem.71753","type":"journal-article","created":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T06:45:18Z","timestamp":1790837118000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High Fatigue\u2010Resistant Photoswitches Based on iridium(III)\u2010DTE Systems"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6074-6213","authenticated-orcid":false,"given":"Ariadna","family":"Pazos","sequence":"first","affiliation":[{"name":"Department of Applied Chemistry University of the Basque Country (EHU) Donostia Spain"},{"name":"Donostia International Physics Center (DIPC)  Donostia Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F. Borja","family":"Urquiola","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry University of the Basque Country (EHU) Donostia Spain"},{"name":"Institut Des Sciences Mol\u00e9culaires University of Bordeaux  Talence France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8990-6305","authenticated-orcid":false,"given":"N\u00edcolas Oliveira","family":"Decarli","sequence":"additional","affiliation":[{"name":"Institut Des Sciences Mol\u00e9culaires University of Bordeaux  Talence France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2932-3255","authenticated-orcid":false,"given":"Brice","family":"Kauffmann","sequence":"additional","affiliation":[{"name":"UAR3033 I US001 I IECB University of Bordeaux Pessac 33600 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2647-1439","authenticated-orcid":false,"given":"Gediminas","family":"Jonusauskas","sequence":"additional","affiliation":[{"name":"LOMA University of Bordeaux  Talence France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0285-1741","authenticated-orcid":false,"given":"Nathan D.","family":"McClenaghan","sequence":"additional","affiliation":[{"name":"Institut Des Sciences Mol\u00e9culaires University of Bordeaux  Talence France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2044-2725","authenticated-orcid":false,"given":"Zoraida","family":"Freixa","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry University of the Basque Country (EHU) Donostia Spain"},{"name":"IKERBASQUE Basque Foundation for Science  Bilbao Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/ic035334e"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/jo00239a022"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr980069d"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr500249p"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2004.12.015"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1039\/9781849734899-00166"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1246\/cl.2007.888"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/ol802580m"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/asia.201000820"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1039\/c2cc34054b"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1021\/ic2002892"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4DT03973D"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dyepig.2020.108191"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja991013j"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1039\/c39920000206"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1039\/B208419H"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0166\u20101280(03)00025\u20103"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.accounts.0c00825"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3SC01458D"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1002\/cptc.201900038"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja067425r"},{"key":"e_1_2_7_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202316706"},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.3762\/bjoc.21.143"},{"key":"e_1_2_7_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/j100048a004"},{"key":"e_1_2_7_26_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200501325"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja047446q"},{"key":"e_1_2_7_28_1","doi-asserted-by":"publisher","DOI":"10.1055\/s\u20102006\u2010942377"},{"key":"e_1_2_7_29_1","unstructured":"Deposition numbers 2541832 (for L1A) 2541833 (for L2A) and 2541834 (for L2B) contain the supplementary crystallographic data for this paper. 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