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Lanthanide Loading of Luminescent Multi-Tridentate Polymers under Thermodynamic Control

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Babel, Lucille
Published in Inorganic chemistry. 2014, vol. 53, no. 7, p. 3568-3578
Abstract This work illustrates the use of basic statistical mechanics for rationalizing the loading of linear multitridentate polymers with trivalent lanthanides, Ln(III), and identifies the specific ionic sizes of europium and yttrium as promising candidates for the further design of organized heterometallic f–f′ materials. Using [Ln(hfac)3] (hfac = hexafluoroacetylacetonate) as lanthanide carriers, the thermodynamically controlled formation of Wolf type-II lanthanidopolymers [{Ln(hfac)3}m(L4)] is modeled with the help of two simple microscopic descriptors: (i) the intrinsic affinity of Ln(III) for the tridentate binding sites fN3Ln and (ii) the intermetallic interactions ΔE1–2Ln,Ln operating between two occupied adjacent sites. Selective complexation (fN3La fN3Eu > fN3Y) modulated by anticooperative interactions (ΔE1–2La,La ΔE1–2Eu,Eu > ΔE1–2Y,Y ≈ 0) favors the fixation of Eu(III) in semiorganized lanthanidopolymers [{Eu(hfac)3}m(L4)] displaying exploitable light-downshifting.
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BABEL, Lucille et al. Lanthanide Loading of Luminescent Multi-Tridentate Polymers under Thermodynamic Control. In: Inorganic Chemistry, 2014, vol. 53, n° 7, p. 3568-3578. doi: 10.1021/ic4030525 https://archive-ouverte.unige.ch/unige:35931

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Deposited on : 2014-04-22

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