Water‐Soluble Organotin Compounds – Syntheses, Structures and Reactivity towards Fluoride Anions in Water

Abstract

Herein, we report the syntheses of the water‐soluble organotin compounds [{Me2(H)N(CH2)3}2SnX2]Y2 (1, X = Cl, Y = ClO4; 2, X = F, Y = ClO4) and {Me2(H)N(CH2)3}2SnX4 (3, X = Cl; 4, X = F). The compounds were characterized by elemental analysis, electrospray mass spectrometry, 1H, 13C, 19F, and 119Sn NMR spectroscopy, and in the case of compounds 1, 3 and 4, by single‐crystal X‐ray diffraction analysis. The reaction of compound 2 with fluoride anions in water was investigated by NMR spectroscopy. DFT calculations accompany the experimental work.

Switching-On Fluorescence by Copper (II) and Basic Anions: A Case Study with a Pyrene-Functionalized Squaramide

“…In order to better understand the structural features of H 2 L, we performed DFT calculations, which have proved an invaluable tool in understanding a large variety of systems, including catalysts [28], NLO dyes [29], metal drugs [30,31], and sensors [32,33]. In this context, theoretical calculations carried out at the DFT level may not only explain the spectroscopic and electrochemical features of systems structurally characterized, but they can also give useful hints in understanding discrete or extended chemical systems not fully characterized yet.…”

A new biphenol-dipicolylamine based ligand and its dinuclear Zn2+ complex as fluorescent sensors for ibuprofen and ketoprofen in aqueous solution

“…In water, anion recognition is an even more tough goal, due the hydration of both receptor and substrate, that hampers their mutual interaction. [15][16][17][18] Both free ligands [19][20][21][22][23][24][25][26][27][28][29][30][31][32] and metal complexes [33][34][35][36][37][38][39][40][41] can be employed as receptors for anions. The use of free ligands implies the formation of noncovalent interactions, such as hydrogen bonds or π-stacking, whereas the metal centers of complexes can act as binding sites for the carboxylate moieties of anionic guests, 42 also offering the receptor a structural organization ( preorganization).…”

A Tetranuclear Copper(II)/Calcium(II) Complex as Dual Chemosensor for Colorimetric and Fluorescent Detection of Non‐Steroidal Anti‐Inflammatory Drugs

“…Especially in water, recognition of anions by synthetic receptors is a real challenge, since water can hydrate the receptor and the substrate through strong hydrogen bonds, competing for the hydrogen bonding sites of the receptor. [6][7][8][9] Nevertheless, sensing of anions is highly desirable, not only due to the crucial role anions play in life processes, but also because they are becoming a considerable source of pollution in wastewater. As an example, NSAIDs (nonsteroidal anti-inflammatory drugs), that are weak acids featuring carboxylic groups and can be therefore present in water in their anionic forms, are among the emerging pollutants (EPs) [10][11][12] that enter the environment mainly with industrial, municipal, pharmaceutical and hospital wastewater.…”

“…Anion recognition in solution though is an arduous task, due to issues related to their large size, that requires suitable host cavities for inclusion, and other crucial properties such as multiple protonation equilibria, diverse geometries (spherical, linear, trigonal, tetrahedral, octahedral), high solvation energies. Especially in water, recognition of anions by synthetic receptors is a real challenge, since water can hydrate the receptor and the substrate through strong hydrogen bonds, competing for the hydrogen bonding sites of the receptor [6–9] . Nevertheless, sensing of anions is highly desirable, not only due to the crucial role anions play in life processes, but also because they are becoming a considerable source of pollution in wastewater.…”