Industrial Applications of Calixarenes. In: Vicens J, Böhmer V, editors. Calixarenes: A Versatile Class of Macrocyclic Compounds. Dordrecht: Springer Netherlands; 1990. pp. 235-59. [DOI: 10.1007/978-94-009-2013-2_10]

Crystal structure of 4,10,16,22-tetrahydroxy-6,12,18,24-tetramethoxy-2,8,14,20-tetraethylphenylresorcin[4]arene – ethyl acetate (1/1), C68H72O10

C68H72O10, triclinic, P1̅ (no. 2), a = 13.3619(4) Å, b = 13.9234(4) Å, c = 16.6975(5) Å, α = 96.023(2)°, β = 104.537(1)°, γ = 105.625(1)°, V = 2845.85(15) Å3, Z = 2, R gt(F) = 0.0491, wR ref(F2) = 0.1311, T = 173 K.

Non-covalent calixarene-amino acid complexes formed by MALDI-MS

Non-covalent inclusion complexes formed between amino acids and derivatized calix[6]arenes are observed in MALDI mass spectrometry. The methyl, ethyl, and propyl ester derivatives of calix[6]arene yielded amino acid complexes, while the smaller calix[4]arene analogs did not. Similarly the underivatized calix[6]arene and calix[4]arene did not produce complexes. Amino acid complexes were observed for nearly all 20 amino acids in time-of-flight (TOF) analysis. In Fourier transform mass spectrometry (FTMS) analysis, however, only the most basic amino acids arginine, histidine, and lysine formed stable adducts. The complexes were abundant under matrix-assisted laser desorption ionization (MALDI) conditions, which suggested favorable interactions between host and guest.

A Reversed-phase HPLC Study of the Complexation of Benzene Derivatives Guest Molecules with 5,17-bis(N-Tolyliminomethyl)-25,27-dipropoxycalix[4]arene in Acetonitrile–Water Solution

Stability constants of the host–guest complexes of 5,17-bis( N-tolyliminomethyl)-25,27-dipropoxycalix[4]arene with benzene derivatives were determined by reversed-phase HPLC in acetonitrile–water solution.