Controlling Lanthanide Exchange in Triple-Stranded Helicates: A Way to Optimize Molecular Light-Upconversion

Zare, Davood; Suffren, Yan Jonathan Mathieu; Nozary, Homayoun; Hauser, Andreas; Piguet, Claude

doi:10.1002/anie.201709156

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Title		Controlling Lanthanide Exchange in Triple-Stranded Helicates: A Way to Optimize Molecular Light-Upconversion
Authors		Zare, Davood Suffren, Yan Jonathan Mathieu Nozary, Homayoun Hauser, Andreas Piguet, Claude
Published in		Angewandte Chemie (International Edition). 2017, vol. 56, no. 46, p. 14612-14617
Abstract		The kinetic lability of hexadentate gallium-based tripods is sufficient to ensure thermodynamic self-assembly of luminescent heterodimetallic [GaLn(L3)3]6+ helicates on the hour time scale, where Ln is a trivalent 4f-block cation. The inertness is, however, large enough for preserving the triplehelical structure when [GaLn(L3)3]6+ is exposed to lanthanide exchange. The connection of a second gallium-based tripod further slows down the exchange processes to such an extent that spectroscopically active [CrErCr(L4)3]9+ can be diluted into closed-shell [GaYGa(L4)3]9+ matrices without metal scrambling. This feature is exploited for pushing molecularbased energy-transfer upconversion (ETU) at room temperature.
Identifiers		DOI: 10.1002/anie.201709156
Full text		Article (Published version) (2.5 MB) - Limited access to UNIGE Article (Published version) (2 MB) - Limited access to UNIGE
Structures		Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée Faculté des sciences / Section de chimie et biochimie / Département de chimie physique
Research group		Groupe Piguet
Citation (ISO format)		ZARE, Davood et al. Controlling Lanthanide Exchange in Triple-Stranded Helicates: A Way to Optimize Molecular Light-Upconversion. In: Angewandte Chemie: International Edition, 2017, vol. 56, n° 46, p. 14612-14617. doi: 10.1002/anie.201709156 https://archive-ouverte.unige.ch/unige:98963