Aude Livoreil's research while affiliated with French National Centre for Scientific Research and other places

... Pincer-type [1,2] terpyridine ligands (2,2′:6′,2″-terpyridine tpy; pincer ligands are tridentate, 6electron donor ligands that enforce a meridional coordination geometry on the metal centre) and their manifold complexes [3] play a central role in key fields of coordination chemistry with important applications in supramolecular chemistry [4][5][6][7][8][9][10][11][12][13][14], spin-crossover (SCO) phenomena [15][16][17][18], homogeneous catalysis [19][20][21], biomedical applications [22], redox non-innocence [23][24][25][26][27] or photochemistry [6,7,28], to name just a few. ...

... In an early example, Sauvage and co-workers synthesized a sophisticated [2]catenane that featured a 2,9-diphenylphenanthroline (2,9-DPphen) macrocycle interlocked to a second macrocycle that contained phen and terpy ligand sites (stations) (Figure 1). 40,41 Initially, due to the copper(I) template approach used to obtain the [2]catenand, the 2,9-DPphen macrocycle is coordinated at the phen ligand site of the second more complex macrocycle as this satisfies the coordination geometry preference of the Cu(I) ions and generates a tetrahedrally coordinated [Cu-(phen) (2,] + co-conformer with the terpy site free. However, when the copper(I) ion is oxidized to copper(II), the harder, more highly charged copper(II) ion has different coordination geometry preferences and forms the higher, five-, or six-coordinate complex. ...

... Of note, the addition of Δ-4 in CD 2 Cl 2 also markedly inhibited the tight-to-loose isomerisation. 1 without significant isomerisation or degradation at 293 K in CD 2 Cl 2 even after 14 days ( Supplementary Fig. 116). One possibility is that the Δ-TRISPHAT anion associates with the cationic 1 tight with a similar symmetry to increase the stability, which was supported by the shift and splitting of the 1 H NMR and 19 F NMR signals of the encapsulated triflate ( Supplementary Figs. ...

... [19,20] The use of external stimulus to trigger and control the motions of certain component in such host-guest systems has provided additional dynamic approach to the construction of mutifunctional nanoscale machines beyond their unique self-locking features. By design, catenanes have been synthesized and showed controlled motion in the presence of light, [21][22][23] chemical stimulation, [24][25][26][27][28][29] chemical fuels, [30][31][32] thermal [33] and electricity [16,34] with high efficiency. ...

... The initial molecular machines were based on supramolecular chemistry. For example, the first prototype of the molecular machine was reported by Livoreil et al. [4] in 1994, which utilized the redox of copper ions to control the movement of two interlocked coordinating rings in [2]-catenate. Subsequently, a variety of molecular machines have been reported, such as molecular muscles, molecular elevators, molecular motors, and molecular cars [5][6][7][8][9][10][11][12]. ...