Abstract Among seven possible nitrogen‐in constitutional isomers of porphyrin only one, porphycene, has been obtained so far in the free, unsubstituted form. Herein, synthesis another isomer, parent hemiporphycene ( HPc ), and its thorough structural, spectral, photophysical, electrochemical, theoretical characterization are reported. Most properties intermediate between those as evidenced by values inner‐cavity dimensions, orbital‐energy splittings, absorption coefficients, magnetic...

Of the available ligands for study of molecular recognition by para-sulfonato-calix[n]arene receptors, phenanthroline is proving to a far more versatile moiety than it would have initially been expected. Interactions with two anionic host molecules, para-sulfonato-calix[4]arene and para-sulfonato-calix[8]arene, previously examined in depth described. In this paper, further structural studies concerning supramolecular self-assembly species unsubstituted calix[6]arene,...

The solid state structures of four complexes between para-sulphonato-calix[4]arene and phenanthroline have been determined. Three are simple the two molecules however fourth contains aluminium cations, from a extraction involving foil used in weighing step. cations involved both inclusion also various assemblies formed by aromatic–aromatic stacking.

A facile, one-step synthesis of new calix[4]naphthalenes and the conformational complexation properties homomacrocycles hybrid macrocycle are presented.

The solid-state structures of eight complexes between para-sulfonato-calix[4]arene (C4S) and bipyridinium derivatives, 4,4′-bipyridine (BP), 1,2-bis(4-pyridyl)ethane (BPE), 1,3-bis(4-pyridyl)propane (BPP), have been determined. All the show high degrees solvation, involving water ethanol or methanol acetone. observed host/guest stoichiometry is determined in part by nature solvent. A wide range noncovalent interactions are various complexes, with dominant interaction being hydrogen bonding...

5-Oxatruxene presents new quality among the truxenes. It is a promising compound for class of optoelectronic materials.

Two new conformations of <italic>para</italic>-sulphonato-calix[8]arene have been found in supramolecular complexes with <bold>BPE</bold> and <bold>BPP</bold>, the gas take-up has demonstrated for <bold>S8C</bold>–<bold>BPE</bold> complex.

1,3-[Ethylene-bis(aminocarbonylmethyl)]-p-tert-butylcalix[4]arene is analyzed and its optical properties are investigated, showing luminescence upon aggregation at low temperature or in the solid state described as aggregation-induced blue emission. The shift of self-assembly from nanoporous to helical framework crystal associated with a remarkable blue-shift 33-fold increase fluorescence intensity. purple-blue light emission highly efficient (ΦF ∼ 60%) switched thermally activated yellow...

The following work presents three general approaches allowing, for the first time, synthesis of 5,10-diheterotruxene derivatives containing two identical heteroatoms, namely, oxygen OOC, nitrogen NNC, or sulfur SSC. Two described pathways involve photocyclization corresponding triene 2 as a key step leading to heptacyclic aromatic system. third approach is based on acidic condensation between ninhydrin 14 and benzo[b]heteroole 15. Typical functionalizations core have also been presented. In...

Twelve molecules of β-carbonyl-para-octyl-calix[4]arene assemble in an aggregate containing two types cavities filled by water and they pack a cubic structure. Both the aggregates packing resemble that observed for inverse micelles.

Abstract Porphycene, a porphyrin isomer, is an efficient fluorophore. However, four‐fold meso substitution with alkyl groups decreases the fluorescence quantum yield by orders of magnitude. For aryl substituents, this effect small. To explain difference, we have synthesized and studied mixed aryl‐alkyl‐substituted compound, 9,20‐diphenyl‐10,19‐dimethylporphycene, as well 9,20‐diphenyl 9,20‐dimethyl derivatives. Analysis structural, spectroscopic, photophysical data six porphycenes, combined...

Exceptionally flexible inclusion compound having three-dimensional (3D) solvent-accessible voids was built from single 1,3-ethylene diamide bridged p-tert-butyl-calix[4]arene. The robustness of the crystalline order originates a fascinating square-grid framework open molecular capsules that is entirely van der Waals forces and weak hydrogen bonding. Yet, its flexibility induced by controlled solvent-directed "breathing behavior". 3D network channels generates extrinsic sufficiently elastic...

This paper presents an alternative path for the synthesis of 5-thiatruxene and synthetic approach 5-azatruxene not known so far. A new method improves overall reaction yield from 17.5 to 22.6%, diminishes time costs by reducing steps 5 2, simplifies isolation intermediate final products. The is 32.4%. typical reactivity both aromatic systems also demonstrated. Recent research results suggest use as acceptor subunit soluble blue emitters.

Geometry, electronic and vibrational structure, relative energies of different tautomeric forms have been calculated for free base corrphycene its five tetra-, octa-, dodeca-alkyl-substituted derivatives, which only one has synthesized so far. The results demonstrate that the lowest energy structure always corresponds to transtautomeric form. Comparison with experimental IR X-ray data available 2,3,6,7,11,12,17,18-octaethylcorrphycene shows, in contrast previous suggestions, th. transspecies...

The paper presents results concerning construction of inclusion complexes para-sulphonato-calix[8]arene with 1,10-phenanthroline. Structures crystalline host–guest were determined by means X-ray diffraction. Intermolecular interactions analyzed and the organization ions molecules in crystal lattice was described.

In streptidinium sulfate monohydrate {systematic name: 1,1′-[(1S,3R,4S,6R)-2,4,5,6-tetra­hydroxy­cyclo­hexane-1,3-di­yl]di­guan­idinium monohydrate}, C8H20N6O42+·SO42−·H2O, at 100 (2) K, the components are arranged in double helices based on hydrogen bonds. One helix contains cations and other disordered anions solvent water mol­ecules. The linked into a three-dimensional hydrogen-bonded network by O—H⋯O N—H⋯O

para-Sulfonato-calix[4]arene has been shown to be an excellent receptor for many biomolecules. Here we present four complexes of para-sulfonato-calix[4]arene with bioactive molecules, i.e., 2-aminobenzimidazole, thiamine, spermine, and streptidine. Structures the obtained crystalline were determined by X-ray diffraction. The first three biomolecules are accommodated inside hydrophobic cavity receptor, according lock-and-key model. fourth guest (streptidine) loses competition a place...