{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T11:09:56Z","timestamp":1785409796892,"version":"3.56.0"},"reference-count":93,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T00:00:00Z","timestamp":1780963200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001711","name":"Swiss National Science Foundation","doi-asserted-by":"publisher","award":["200020_207313"],"award-info":[{"award-number":["200020_207313"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]},{"award":["200020_207313"],"award-info":[{"award-number":["200020_207313"]}],"id":[{"id":"https:\/\/ror.org\/00yjd3n13","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>The connection of a dianionic 2,2\u2019-biimidazolate (biim2\u2212) bridging unit to cis-[Cr(N\u2229N)2]3+ (N\u2229N is a chelating didentate ligand) or cis-[Cr(N\u2229N\u2229N\u2229N)]3+ building blocks (N\u2229N\u2229N\u2229N is a chelating tetradentate ligand) produces heteroleptic pseudo-octahedral [CrN6]+ chromophores. Their reduced cationic charge is compatible with the subsequent complexation of trivalent lanthanides (Ln3+) to give d-f {[(N\u2229N)2Cr(biim)]nLn}(3+n)+ (n = 1\u20134), {[(N\u2229N)2Cr(biim)]Ln(Tp)2}2+ and {[(N\u2229N\u2229N\u2229N)Cr(biim)]Ln(Tp)2}2+ adducts (Tp is tri(1H-pyrazol-1-yl)-\u03bb4-borate). Moving from polyaromatic N\u2229N (1,10 phenanthroline) to saturated N\u2229N\u2229N\u2229N polyamine (cyclam) receptors controls the photophysical properties and leads to tunable light conversion in the target heterometallic complexes when Eu(III) is exploited as the activator for downshifting and Er(III) as the activator for upconversion.<\/jats:p>","DOI":"10.3390\/molecules31122016","type":"journal-article","created":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T00:58:12Z","timestamp":1781053092000},"page":"2016","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Heteroleptic [CrIIIN6] Chromophores as Partners for Lanthanide-Based Light Conversion in d-f Molecular Complexes"],"prefix":"10.3390","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4916-6899","authenticated-orcid":false,"given":"Julien","family":"Chong","sequence":"first","affiliation":[{"name":"Department of Inorganic and Analytical Chemistry, University of Geneva, 1211 Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2947-7665","authenticated-orcid":false,"given":"In\u00e8s","family":"Taarit","sequence":"additional","affiliation":[{"name":"Department of Inorganic and Analytical Chemistry, University of Geneva, 1211 Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laure","family":"Gu\u00e9n\u00e9e","sequence":"additional","affiliation":[{"name":"Laboratory of X-Ray Crystallography, University of Geneva, 1211 Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arnulf","family":"Rosspeintner","sequence":"additional","affiliation":[{"name":"Department of Physical Chemistry, University of Geneva, 1211 Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7064-8548","authenticated-orcid":false,"given":"Claude","family":"Piguet","sequence":"additional","affiliation":[{"name":"Department of Inorganic and Analytical Chemistry, University of Geneva, 1211 Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"766","DOI":"10.1143\/JPSJ.9.766","article-title":"On the Absorption Spectra of Complex Ions 2","volume":"9","author":"Tanabe","year":"1954","journal-title":"J. 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