Université de Fribourg

Cis- and trans-9,10-di(1H-imidazol-1-yl)-anthracene based coordination polymers of ZnII and CdII: synthesis, crystal structures and luminescence properties

Vasylevskyi, Serhii I. ; Regeta, Khrystyna ; Ruggi, Albert ; Petoud, Stéphane ; Piguet, Claude ; Fromm, Katharina M.

In: Dalton Transactions, 2018, vol. 47, no. 2, p. 596–607

New functional coordination polymers based on the semi-flexible 9,10-di(1H-imidazol- 1-yl)-anthracene ligand (L) with ZnII and CdII, namely {[Zn(μ2-L)2] (ClO4)2·m(MeOH)·n(DCM)}n (1), {[Zn(μ2-L)2](BF4)2·m(MeOH)·n(DCM)}n (2), {[Zn(μ2-L)2(p-Tos)2]·m(DCM)·n(MeOH)}n (3), {[Cd(μ2-L)2(p-Tos)2]·m(DCM)}n (4) {[Cd(μ2-L)2(p-Tos)2]·m(MeOH)·n(Dioxane)}n (5) and {[Zn(μ2-...

Université de Neuchâtel

Bent Tridentate Receptors in Calamitic Mesophases with Predetermined Photophysical Properties: New Luminescent Lanthanide-Containing Materials

Nozary, Homayoun ; Piguet, Claude ; Tissot, Paul ; Bernardinelli, Gérald ; Bünzli, Jean-Claude G. ; Deschenaux, Robert ; Guillon, Daniel

In: Journal of the American Chemical Society (JACS), 1998, vol. 120, no. 47, p. 12274–12288

A new synthetic strategy has been developed to introduce bent and rigid tridentate 2,6-bis(benzimidazol-2‘-yl)pyridine cores into rodlike ligands L11-17. The crystal structure of the nonmesogenic ligand L13 (C39H37N5O4, triclinic, P1̄, Z = 2) shows the expected trans−trans conformation of the tridentate...

Université de Neuchâtel

Aromatic Bent-Core Liquid Crystals: an Opportunity for Introducing Terdentate Binding Units into Mesophases

Nozary, Homayoun ; Piguet, Claude ; Rivera, Jean-Pierre ; Tissot, Paul ; Morgantini, Pierre-Yves ; Weber, Jacques ; Bernardinelli, Gérald ; Bünzli, Jean-Claude G. ; Deschenaux, Robert ; Donnio, Bertrand ; Guillon, Daniel

In: Chemistry of Materials, 2012, vol. 14, no. 3, p. 1075–1090

Lipophilic linear semirigid side arms containing two or three successive phenyl rings separated by carboxylate spacers have been connected to the 5 or 6 positions of bent aromatic terdentate 2,6-bis(benzimidazol-2-yl)pyridine binding units to give extended V-shaped (L11) and I-shaped receptors (L12, L12b, and L13). The carboxylate spacers limit the flexibility of the...

Université de Neuchâtel

Toward lanthanide-containing metallomesogens with tridentate ligands

Nozary. Homayoun ; Piguet, Claude ; Tissot, Paul ; Bernardinelli, Gérald ; Deschenaux, Robert ; Vilches, Maria Theresa

In: Chemical Communications (ChemComm), 1997, vol. 21, p. 2101-2102

Tridentate aromatic receptors L1–L4 containing the 2,6-bis(benzimidazol-2-yl)pyridine chelating unit are designed to exhibit thermotropic calamitic liquid-crystalline phases; the mesomorphic behaviour is essentially retained in the complex [LuL2(NO3)3].

Université de Neuchâtel

Encoding calamitic mesomorphism in thermotropic lanthanidomesogens

Terazzi, Emmanuel ; Bocquet, Bernard ; Campidelli, Stéphane ; Donnio, Bertrand ; Guillon, Daniel ; Deschenaux, Robert ; Piguet, Claude

In: Chemical Communications (ChemComm), 2006, vol. 27, p. 2922-2924

Peripheral cyanobiphenyl dendrimers impose a microphase organization compatible with smectic mesomorphism, in which the bulky nine-coordinate lanthanide core is located between the decoupled mesogenic sublayers made up of parallel cyanobiphenyl groups.