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These two [Cu<jats:sub>4<\/jats:sub>I<jats:sub>4<\/jats:sub>L<jats:sub>4<\/jats:sub>] clusters differ by their coordinated phosphine ligand and the luminescent mechanochromic properties are only displayed by one of them. The two clusters are AIE\u2010active luminophors that exhibit an intense emission in the visible region upon aggregation. The formed particles present luminescent thermochromism comparable to that of the bulk compounds. The observed AIE properties can be attributed to suppression of nonradiative relaxation of the excited states in a more rigid state, in relation to the large structural relaxation of the excited triplet state. The differences observed in the AIE properties of the two clusters can be related to the different ligands. A correlation between the luminescence mechanochromic properties and the AIE effect is not straightforward, but the formation of \u201csoft\u201d molecular solids is a common characteristic that can explain the photoactive properties of these compounds.<\/jats:p>","DOI":"10.1002\/asia.201900807","type":"journal-article","created":{"date-parts":[[2019,8,28]],"date-time":"2019-08-28T17:37:37Z","timestamp":1567013857000},"page":"3166-3172","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Aggregation\u2010Induced Emission Properties of Copper Iodide Clusters"],"prefix":"10.1002","volume":"14","author":[{"given":"Raquel","family":"Utrera\u2010Melero","sequence":"first","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean\u2010Yves","family":"Mevellec","sequence":"additional","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Gautier","sequence":"additional","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Stephant","sequence":"additional","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florian","family":"Massuyeau","sequence":"additional","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6341-8629","authenticated-orcid":false,"given":"Sandrine","family":"Perruchas","sequence":"additional","affiliation":[{"name":"Institut des Mat\u00e9riaux Jean Rouxel (IMN) CNRS Universit\u00e9 de Nantes  2 rue de la Houssini\u00e8re, BP 32229 44322 Nantes Cedex 3 France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,8,28]]},"reference":[{"key":"e_1_2_6_1_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr900289f"},{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201504424"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201405826"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201503500"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/nchem.411"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1039\/c2cs35016e"},{"key":"e_1_2_6_7_1","unstructured":"\u00a0"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1039\/c1cs15113d"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.5b00263"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1039\/b105159h"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201802114"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201803924"},{"key":"e_1_2_6_13_1","doi-asserted-by":"crossref","unstructured":"Special Issue on Aggregation-Induced Emission:Chem. 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