COA of Formula: C7H9NO2SIn 2022 ,《Fluorogenic detection of sulfite in water by using copper(II) azacyclam complexes》 was published in Molecules. The article was written by Ciarrocchi, Carlo; Sacchi, Donatella; Boiocchi, Massimo; Weththimuni, Maduka Lankani; Orbelli Biroli, Alessio; Licchelli, Maurizio. The article contains the following contents:
Copper(II) azacyclam complexes (azacyclam = 1,3,5,8,12-pentaazacyclotetradecane) containing naphthyl or dansyl subunits can be prepared by template synthesis involving proper sulfonamide derivatives as locking fragments. The macrocyclic complexes are very poorly emissive due to the fluorescence-quenching behavior displayed by Cu2+ ions. However, the fluorescence can be recovered as a result of the decomposition of the complexes, which induces the release of free light-emitting subunits to the solution This reaction takes place very slowly in neutral water but its rate is increased by the presence of sulfite. Therefore, [Cu(azacyclam)]2+ derivatives have been investigated as simple chem. probes for the fluorogenic detection of sulfite both on laboratory and real samples. Preliminary tests performed on samples of white wine provided sulfite concentration values that are in agreement with those obtained by a standard anal. method. In the experiment, the researchers used 4-Methylbenzenesulfonamide(cas: 70-55-3COA of Formula: C7H9NO2S)
4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Acylation is one of the most important reactions of primary and secondary amines; a hydrogen atom is replaced by an acyl group (a group derived from an acid, such as RCOOH or RSO3H, by removal of ―OH, such as RC(=O)―, RS(O)2―, and so on). Reagents may be acid chlorides (RCOC1, RSO2C1), anhydrides ((RCO)2O), or even esters (RCOOR′); the products are amides of the corresponding acids.COA of Formula: C7H9NO2S
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics