An overview of anion coordination by hydroxyl, amine and amide based rigid and symmetric neutral dipodal receptors

Transformation of the coordination nanostructures of 4,4′,4′′-(1,3,5-triazine-2,4,6-triyl) tribenzoic acid molecules on HOPG triggered by the change in the concentration of metal ions

“…A variety of studies have demonstrated the coordination nanostructures by altering organic ligands, such as carboxylate, 3,5,12,18 hydroxyl, 14,20,21 pyridine, 9,22-25 and triazine. [26][27][28][29][30] The triazine derivatives are important in a range of areas as ligands for supramolecular self-assembly of more complex mixed layers, hence it may be interesting to study the coordination properties of the triazine derivatives.…”

Anion Recognition by a Pincer-Type Host Constructed from Two Polyamide Macrocyclic Frameworks Jointed by a Photo-Addressable Azobenzene Switch

“…In artificial molecular receptors, a strong and selective binding of anions, such as chloride [11], carboxylates [12][13][14][15], and phosphates [16,17], might be realized by the selection of a proper molecular platform and decorating it with neutral (thio)amide [18][19][20], (thio)urea [19][20][21][22], pyrrole [23,24], and/or cationic ammonium [25], guanidinium [14,26], and imidazolium [27,28] binding groups. Despite enormous progress in the field of anion supramolecular chemistry in recent decades [1,2,19,[29][30][31], the prediction of exact anion affinity and selectivity of a designed receptor is still a challenging task due to difficulties in simulating the correct contribution of solvation and entropy effects on the stability of the supramolecular receptor-anion complex [9,[32][33][34][35][36][37]. This is particularly relevant for the Materials 2022, 15, 692 2 of 15 more demanding chiral anion recognition, as the differences in Gibbs free energy between diastereomeric complexes are usually expected not to exceed 2 kcal•mol −1 .…”

Colorimetric fluoride detection in dimethyl sulfoxide using a heteroleptic ruthenium(ii) complex with amino and amide groups: X-ray crystallographic and spectroscopic analyses

“…12–14 Compounds containing NH protons, such as imidazoles, pyrazoles, amides, amino, thiourea, and urea derivatives, have been extensively used as chromogenic and fluorogenic sensors for anions, and naturally for F − anions. 1,2,13–25 This is due to the ability of the NH proton to participate in strong hydrogen-bonding interactions with F − . 16…”

“…Recognition of toxic anions has recently become a signicant aspect of supramolecular and coordination chemistry owing to its potential applications in environmental, biological, industrial, and agricultural elds. [1][2][3][4][5][6][7][8][9][10][11] In particular, uoride (F À ) sensing is attracting considerable attention because of the small size, high charge density, and hard Lewis characteristics of F À . Fluoride is used to treat osteoporosis and maintain dental health, and is readily absorbed by the human body but excreted sluggishly.…”