(2001) Syntheses and Binding Properties of Polymeric calix[4]crown-4.

Relatively few examples of calix[4]crown-based ligands incorporate upper rim-functionality.

(1994) Schiff Base p-tert-butylcalix[4]arenes.

These ligands are characterized by the presence of two types of coordination sites on their lower rim: one crowning unit of different length, linking two proximal calix[4]arene phenolic oxygens, and two esters or amide groups acting as additional hard binding sites.

Calix [4] arene Specifications

A novel calix[4]arene amphiphilic molecule, denoted by CCaL3, was synthesized and found to form a spherical micelle consisting of 12 molecules at low pH in aqueous solution. Furthermore, uniform Au nanoparticles with 2.0 nm in diameter were synthesized in aqueous solution on the template consisting of the four cysteines of the upper rim of CCaL3. Asymmetric field flow fractionation coupled with light scattering showed that there was no dispersity in the CCaL3 micellar aggregation number. When AuCl4 ions were added into the CCaL3 micelle solution, induced circular dichroism (ICD) appeared, indicating appearance of the structural chirality of the CCaL3/AuCl4 complex. A combination of electron microscopy and small-angle X-ray scattering showed that helically coiled bilayer sheets were formed upon addition of AuCl4. Subsequent reduction with the amine of cysteine moieties led to uniform Au nanoparticles formation with 2.0 nm in diameter on the micellar plate surface. The nanoparticle size was almost equal to the size of cavity constructed by the four cysteines on the calix[4]arene upper rim, indicating that the growth of Au nanoparticles was spatially controlled by the host–guest interaction between the cysteines and Au.

The first highly water-soluble perylene–calix[4]arene hybrid with the calixarene scaffold acting as a structure-determining central platform is presented. In this tetrahedrally shaped amphiphilic architecture the hydrophilic and hydrophobic subunits are oriented at the opposite side of the calixarene platform. The hydrophobic part contains the two perylene diimide moieties, which enable strong π–π interactions in self-assembly processes. Two hydrophilic Newkome-type dendrons provide sufficient water solubility at slightly basic conditions. The tetrahedrally shaped amphiphile displays an unprecedented aggregation behavior down to concentrations as low as 10–7 mol L–1. The intriguing self-assembly process of the compound in water as well as under changed polarity conditions, achieved by addition of THF, could be monitored by the complemented use of cryogenic transmission electron microscopy (cryo-TEM), UV–vis spectroscopy, and fluorescence spectroscopy. Molecular-dynamics and molecular modeling simulations helped in understanding the interplay of supramolecular and optical behavior.


Synthesis of a cone-conformer bimodal calix[4]arene …

N2 - New calix[4]arene-based carceplexes are obtained via solvent or doped inclusion; chemical modification of calix[4]arene-based carcerands can be used to modify the rotational behaviour of the incarcerated guest.

Amphiphilic Perylene-Calix[4]arene Hybrids: Synthesis …

(2013) Synthesis and Properties of Calix[4]arene Polymers Containing Amide Groups: Exploration of Their Extraction Properties towards Dichromate and Nitrite Anions.

Calix[4]arene-Based Bis[2]catenanes: Synthesis and …

AB - Calix[4]arenes constrained to 1,3-alternate conformation and functionalized at the upper rim with four and two nitronyl nitroxides have been synthesized, and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings.

The synthesis and characterization of calix[4]arene …

(1995) Synthesis, Complexation, and Membrane Transport Studies of 1, 3-alternate calix[4]arene-crown-6 Conformers: A New Class of Cesium Selective Ionophores.

Synthesis of calix[4]arene–cyclen conjugates - …

N2 - Calix[4]arenes constrained to 1,3-alternate conformation and functionalized at the upper rim with four and two nitronyl nitroxides have been synthesized, and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings.

Synthesis and Reactivity of Calix[4]arene-Supported …

(1990) Complexation of Alkali Metal Cations by Conformationally Rigid, Stereoisomeric calix[4]arene Crown Ethers: A Quantitative Evaluation of Preorganization.