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Jean-Claude Bünzli

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Related publications (119)

Encapsulation of labile trivalent lanthanides into a homobimetallic chromium(III)-containing triple-stranded helicate. Synthesis, characterization, and divergent intramolecular energy transfers

The segmental bidentate–tridentate–bidentate ligand L2 reacts with MII (M = Cr, Zn) and LnIII (Ln = La, Eu, Gd, Tb, Lu) to give the heterotrimetallic triple-stranded helicates [MLnM(L2)3]7+. For M = ZnII, the isolated complexes ZnLnZn(L2)37 (Ln = ...

2006

Introducing bulky functional lanthanide cores into thermotropic metallomesogens: a bottom-up approach

Jean-Claude Bünzli, Rosario Scopelliti, Stéphane Suarez

Basic thermodynamic considerations are used to rationalize the formation of thermotropic mesophases incorporating aromatic ligands for trivalent lanthanide metal ions (Ln). Standard flat and bent molecular interfaces, separating the central binding unit fr ...

2006

Dual Emission from Luminescent Nonalanthanide Clusters

Jean-Claude Bünzli, Rosario Scopelliti, Steve Comby

Clusters containing nine lanthanide and six sodium ions are crystallized with the help of a tridentate ligand bearing a phosphonic acid group; the structure of the EuIII compound reveals a host-guest assembly Eu⊂Na6Eu8L16 with a substantial quantum yield ( ...

2006

Lanthanide-containing luminescent molecular edifices

Jean-Claude Bünzli

The first part of this short review focuses on the insertion of luminescent lanthanide ions into molecular compounds. The main requirements for the development of highly luminescent chelates with potential applications in biomedical analysis and time-resol ...

2006

Benefiting from the Unique Properties of Lanthanide Ions

Jean-Claude Bünzli

The recent upsurge of interest in contrast agents for magnetic resonance imaging, of luminescent chemosensors for medical diagnostic, and lately, for optical imaging of cells has generated an impressive momentum for the coordination and supramolecular chem ...

2006

Use of Dipicolinate-Based Complexes for Producing Ion-Imprinted Polystyrene Resins for the Extraction of Yttrium-90 and Heavy Lanthanide Cations

François Bochud, Jean-Claude Bünzli, Rosario Scopelliti, Anne-Sophie Chauvin

Highly selective separation of yttrium (and lanthanides) is of interest for the design of radiopharmaceuticals, and an efficient method based on the ion-imprinting concept is proposed here. The synthesis and structural, thermodynamic and photophysical char ...

2006

Fluorinated β-Diketones for the Extraction of Lanthanide Ions: Photophysical Properties and Hydration Numbers of Their EuIII Complexes

Jean-Claude Bünzli, Frédéric Gumy, Anne-Sophie Chauvin

Tris(β-diketonato)europium(III) with a series of variably fluorinated ligands derived from 3,5-heptanedione were synthesised with the aim of determining their hydration state under extraction conditions. The number of coordinated water molecules was determ ...

2006

NIR Lanthanide Luminescence by Energy Transfer from Appended Terpyridine-Boradiazaindacene Dyes

Jean-Claude Bünzli, Rosario Scopelliti

Mononuclear trivalent lanthanide complexes with formula [Ln(L)(NO3)3] [in which L=4,4-difluoro-8-(2:2;6:2-terpyridin-4-yl)-1,3,5,7-tetramethyl-2,6-diethyl-4-bora-3a,4a-diaza-s-indacene (Boditerpy)] are reported for Ln=Yb, Nd, Er, La and Gd. According to th ...

2006

Lanthanide Triple-Stranded Helicates: Controlling the Yield of the Heterobimetallic Species

Jean-Claude Bünzli, Rosario Scopelliti, Thomas Binderup Jensen

Two unsymmetrical ditopic hexadentate ligands designed for the simultaneous recognition of two different trivalent lanthanide ions have been synthesized, LAB2 and LAB3, where A represents a tridentate benzimidazole-pyridinebenzimidazole coordination unit, ...

2006

Dimeric Complexes of Lanthanide(III) Hexafluoroacetylacetonates with 4-Cyanopyridine N-Oxide: Syn thesis, Crystal Structure, Magnetic and Photoluminescent Properties

Jean-Claude Bünzli, Frédéric Gumy, Svetlana Eliseeva

A series of new mixed-ligand lanthanide complexes [Ln(hfa)3(4-cpyNO)]2 (Ln = SmIII-HoIII and TmIII; hfa- = hexafluoroacetylacetonate; 4-cpyNO = 4-cyanopyridine N-oxide) have been synthesised by treating the corresponding lanthanide hexafluoroacetylacetonat ...

2006

Stable 8-hydroxyquinolinate-based podates as efficient sensitizers of lanthanide near-infrared luminescence

Jean-Claude Bünzli, Steve Comby, Anne-Sophie Chauvin

New polydentate ligands (e.g., Tsox and TsoxMe) have been synthesized to take advantage of the chelating effect of bidentate 8-hydroxyquinolinate subunits connected to a N,N,N¢,N¢-tetraaminopropyl-1,2-ethylenediamine framework and with the aim of sensitizi ...

2006

Thermotropic lanthanidomesogens

Jean-Claude Bünzli

Due to their high and variable coordination numbers leading to poorly predictable threedimensional coordination spheres, the trivalent lanthanide metal ions are challenging molecular objects for introduction into thermotropic liquid crystals. Conversely, t ...

Royal Society of Chemistry2006

Taking advantage of luminescent lanthanide ions

Jean-Claude Bünzli

Lanthanide ions possess fascinating optical properties and their discovery, first industrial uses and present high technological applications are largely governed by their interaction with light. Lighting devices (economical luminescent lamps, light emitti ...

Royal Society of Chemistry2005

Molecular Control of Macroscopic Cubic, Columnar, and Lamellar Organizations in Luminescent Lanthanide-Containing Thermotropic Liquid Crystals

Jean-Claude Bünzli

The connection of lipophilic gallic acid derivatives at the 5,5¢- or 6,6¢-positions of the rigid 2,6-bis(1-ethyl-benzimidazol-2-yl)pyridine core provides two pro-mesogenic tridentate ligands L10 and L12, whose molecular shapes, anisometries, and directiona ...

2005

Lanthanide luminescent mesomorphic complexes with macrocycles derived from diaza-18-crown-6

Jean-Claude Bünzli, Rosario Scopelliti, Stéphane Suarez

Four tetracatenar (L1–L4) and one hexacatenar (L5) ligands, derived from the diaza-18-crown-6 framework, are synthesized and characterized. In these ligands, the amine functions are fitted with benzoyloxybenzyl linker groups, attached either with a carbony ...

2005

Lanthanide 8-hydroxyquinoline-based podates with efficient emission in the NIR range

Jean-Claude Bünzli, Steve Comby, Anne-Sophie Chauvin

The novel hydroxyquinoline-containing tetrapodal ligand forms water soluble and stable chelates and is a good sensitizer of the NIR luminescence of its NdIII and YbIII complexes; its easy synthesis opens the way for potential biomedical applications. ...

Royal Society of Chemistry2005

Evidencing a reaction intermediate in the formation of the EuIII bimetallic complex with p-tert-butylcalix[8]arene

Jean-Claude Bünzli

2005

Intense near-infrared luminescence of a mesomorphic ionic liquid doped with lanthanide b-diketonate ternary complexes

Jean-Claude Bünzli, Kurt Schenk

The ionic liquid 1-dodecyl-3-methylimidazole chloride ([C12- mim]Cl) is doped with 1 mol-% of the lanthanide ternary complexes [Ln(tta)3(phen)] (tta = thenoyltrifluoroacetonate, phen = 1,10-phenanthroline, Ln = Nd, Eu, Er, Yb), resulting in luminescent mes ...

2005

Tuning the decay time of lanthanide-based near infrared luminescence from micro- to milliseconds through d->f energy transfer in discrete heterobimetallic complexes

Jean-Claude Bünzli

Inert and optically active pseudo-octahedral CrIIIN6 and RuIIN6 chromophores have been incorporated by self-assembly into heterobimetallic triple-stranded helicates HHH-[CrLnL3]6+ and HHH-[RuLnL3]5+. The crystal structures of CrLnL36 (Ln=Nd, Eu, ...

2005

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