Low Molecular Mass Gelators of Organic Liquids and the Properties of Their Gels

Calixarenes are macrocyclic molecules, like crown ethers and cyclodextrins.1-7 Calixarenes made up of phenol and methylene units have many conformational isomers because of two possible rotational modes of the phenol unit: the oxygen-through-theannulus rotation and the para-substituent-throughthe-annulus rotation (Figure 1). The conformational isomers thus yielded afford a great number of unique cavities with the different size and the different shape. Recently, a number of strategies have been exploited by which not only the conformation of calix[4]arenes, but also those of calix[6]arenes and calix[8]arenes, can be immobilized. This means that our group can now design various calixarene-based receptors that show high selectivity for guest molecules and metal cations. In this review article, our group describe novel strategies for cavity design using calix[n]arene skeletons, strategies that are intended to allow complexation of specific molecular targets or metal ions.

Novel Cavity Design Using Calix[n]arene Skeletons: Toward Molecular Recognition and Metal Binding.

Great attention has been given to metal–organic frameworks (MOFs)-derived solid bases because of their attractive structure and catalytic performance in various organic reactions. The extraordinary skeleton structure of MOFs provides many possibilities for incorporation of diverse basic functionalities, which is unachievable for conventional solid bases. The past decade has witnessed remarkable advances in this vibrant research area; however, MOFs for heterogeneous basic catalysis have never been reviewed until now. Therefore, a review summarizing MOFs-derived base catalysts is highly expected. In this review, we present an overview of the recent progress in MOFs-derived solid bases covering preparation, characterization, and catalytic applications. In the preparation section, the solid bases are divided into two categories, namely, MOFs with intrinsic basicity and MOFs with modified basicity. The basicity can originate from either metal sites or organic ligands. Different approaches used for generation o...

Metal-Organic Frameworks for Heterogeneous Basic Catalysis.

Reactivity of Dioxygen−Copper Systems

Calixarene-derived fluorescent probes.

Calixarenes. 4. The synthesis, characterization, and properties of the calixarenes from p-tert-butylphenol

Calixarenes. 1. Analysis of the product mixtures produced by the base-catalyzed condensation of formaldehyde with para-substituted phenols

Calixarenes. 6. Synthesis of a functionalizable calix[4]arene in a conformationally rigid cone conformation

Conformational Characteristics of Ethers and Esters of p-tert-Butylcalix[5]arene

Calixarenes. 15. The formation of complexes of calixarenes with neutral organic molecules in solution

C. David Gutsche

Papers

Calixarenes. 4. The synthesis, characterization, and properties of the calixarenes from p-tert-butylphenol

Calixarenes. 1. Analysis of the product mixtures produced by the base-catalyzed condensation of formaldehyde with para-substituted phenols

Calixarenes. 6. Synthesis of a functionalizable calix[4]arene in a conformationally rigid cone conformation

Conformational Characteristics of Ethers and Esters of p-tert-Butylcalix[5]arene

Calixarenes. 15. The formation of complexes of calixarenes with neutral organic molecules in solution