A highly enantioselective chiral Schiff-base fluorescent sensor for mandelic acid

Chirality and Diastereoselection of Δ/Λ-Configured Tetrahedral Zinc Complexes through Enantiopure Schiff Base Complexes: Combined Vibrational Circular Dichroism, Density Functional Theory, 1H NMR, and X-ray Structural Studies

“…7 The chelate ring is interpreted as a segment of a helix or screw along the C 2 rotation axis (Scheme 1). 8À10 There are continuous developments of optically active Schiff base (HSB*) ligands and their transition metal complexes 11 for applications as enantioselective catalysts, 12 compounds for second harmonic generation, 13 chiral magnetic metal clusters, 14 chiral fluorescent sensors, 15 as homochiral porous lamellar solids for enantioselective recognition and separation, 16 and dielectric materials. 17 If the chelate ligand contains a single, configurationally stable stereogenic center, the R-or S-chirality of the ligand ((R)-A ∧ B or (S)-A ∧ B) and the Δ-or Λ-configuration at the metal center can give rise to four different stereoisomers, if enantiomerically pure ligands are combined with the metal atom: As a general rule, the diastereomeric ratio depends on the thermodynamics of stereochemical induction by the ligand.…”

Optical Super-Resolution Imaging of Surface Reactions

“…It is well-known that metal nanoparticles can catalyze many important chemical processes in industry. 2 Their catalytic activity is largely determined by their surface structures, which are mainly governed by their size, shape, composition, porosity (hollow vs solid), and supports. 10,48,49,113−115 Advances in surface science have led to a large amount of knowledge about the catalytic sites for a wide range of chemical reactions.…”

“…Surface reactions on nanomaterials are important for many modern industrial processes because of the large variety of surface transformations involved, including (de)­hydrogenation, redox, carbon-based bond coupling, and cleavage reactions. − Tremendous work had been done with traditional ensemble methods. − However, because of the inherent heterogeneity among nanoparticles in size, shape, morphology, surface composition, and so on, it is challenging to determine the precise structure–reactivity relationship from such ensemble measurements. For a deeper and more precise understanding of structure–reactivity relationships, it is highly desirable to study surface reactions in situ at the single-molecule/single-particle level in real time with sufficiently high spatiotemporal resolution.…”

Chiral salen Mn(III) complex-based enantioselective potentiometric sensor for l-mandelic acid

“…Current techniques for chiral discrimination of MA have been based on NMR [26], quartz crystal microbalance (QCM) detection [27,28], fluorescence detection [29,30], etc. In this study, chiral salen Mn(III) complex (see Fig.…”