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Here, the postsynthetic modification of isoreticular metal\u2013organic framework\u20103 (IRMOF\u20103) with ethyl oxalyl monochloride and ethyl acetoacetate followed by the chelation of trivalent lanthanide ions afforded efficient near\u2010infrared (Nd<jats:sup>3+<\/jats:sup>) and visible (Eu<jats:sup>3+<\/jats:sup> and Tb<jats:sup>3+<\/jats:sup>) light emitters. IRMOF\u20103 was used as an example owing to its highly porous crystalline structure and the presence of non\u2010coordinating amino groups on the benzenedicarboxylate (bdc) linker, which are amenable to modification. The conversion of the amino groups was 100 and 65\u2009% for ethyl oxalyl monochloride and ethyl acetoacetate, respectively. The materials were characterised by elemental analysis, powder X\u2010ray diffraction, optical and scanning electron microscopy, Fourier transform infrared spectroscopy, and solution (<jats:sup>1<\/jats:sup>H) and (<jats:sup>13<\/jats:sup>C) solid\u2010state nuclear magnetic resonance spectroscopy. The solid\u2010state luminescence properties of Ln\u2010modified IRMOF\u20103 were investigated at room temperature. The presence of the bdc aromatic ring, \u03b2\u2010diketonates and oxamate enhanced the Ln<jats:sup>3+<\/jats:sup> sensitization through ligand\u2010to\u2010metal energy transfer. The magnetic behaviour of all compounds was further analysed. The spin\u2013orbit coupling and zero\u2010field splitting parameters were evaluated by fitting the experimental magnetic susceptibility to the analytical expressions for the free Ln<jats:sup>3+<\/jats:sup> ions.<\/jats:p>","DOI":"10.1002\/ejic.201402789","type":"journal-article","created":{"date-parts":[[2014,9,17]],"date-time":"2014-09-17T10:18:16Z","timestamp":1410949096000},"page":"5285-5295","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":62,"title":["Designing Near\u2010Infrared and Visible Light Emitters by Postsynthetic Modification of Ln<sup>+3<\/sup>\u2013IRMOF\u20103"],"prefix":"10.1002","volume":"2014","author":[{"given":"Reda M.","family":"Abdelhameed","sequence":"first","affiliation":[]},{"given":"Luis D.","family":"Carlos","sequence":"additional","affiliation":[]},{"given":"P.","family":"Rabu","sequence":"additional","affiliation":[]},{"given":"S\u00e9rgio M.","family":"Santos","sequence":"additional","affiliation":[]},{"given":"Artur M. 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