Controlling helical chirality of cobalt complexes by chirality transfer from vicinal diamines

Abstract

Stereoselective cis-trans isomerism of a Co(III)-N2O2 complex has been achieved by coordinating chiral vicinal diamines. The induced metal-centered helical chirality can be exploited for chirality amplification and asymmetric coordination chemistry.

Full characterization and cytotoxic activity of new silver(i) and copper(i) helicates with quaterpyridine

“…This results in the formation of helical structures. 17 The extraordinary architecture and topology of helicates generate numerous applications, especially in terms of medicinal chemistry, 18 chiral synthesis, 19 asymmetric catalysis 20 as well as the generation of optical devices 21 and advanced supramolecular materials. 22 Double-stranded metal helicates are positively charged in their core 23 which results in their ability to bind the DNA helix and consequently prevents the DNA cleavage by restriction enzymes.…”

Study on the Interaction Between Melamine-Cored Schiff Bases with Cucurbit[n]urils of Different Sizes and Its Application in Detecting Silver Ion

“…Schiff bases [1] , usually synthesized by the condensation of ammonia and active carbonyl compound, endowing them both hard nitrogen and oxygen donor atoms [2][3][4][5] , are not only readily coordinate with various transition metal ions to yield different metalorganic framework [6][7][8][9][10][11] , but also can be used as analytical reagents for the detection of different organic and inorganic substances [12][13][14] . Cucurbit[n]urils (Q[n]s, Scheme 1), a kind of supramolecular compound, formed by polymerization of glycoluril, contain rigid cavity for the study of host-guest chemistry and carbonyl groups for the study of coordination chemistry [15][16][17][18][19] .…”

Study on the interactions between melamine-cored Schiff bases with cucurbit[n]urils of different sizes and its application in detecting silver ions

“…Schiff bases [1] are usually synthesized by the condensation of amines and active carbonyl compounds, endowing them both nitrogen and oxygen donor atoms [2][3][4][5]. Schiff bases are not only easy to coordinate with various transition metal ions to yield different metal-organic frameworks [6][7][8][9][10][11], but also can be used as analytical reagents for the detection of different organic and inorganic substances [12][13][14]. Among the various central molecules for the synthesis of Schiff bases, melamine (2,4,6-triamino-s-triazine) has attracted much attention due to its threebranched structure and excellent physical and chemical properties, which is commonly used in many applications including plastic dishes, the main raw material for formaldehyde resin, etc.…”