Using Aryl Diazonium Salts in Palladium-Catalyzed Reactions under Safer Conditions

In this review, we give a concise but complete overview of methods describing the use of aryl diazonium salts in palladium-catalyzed reactions under safe conditions from a laboratory scale to a multikilogram scale. The approaches summarized herein are critically discussed, highlighting strengths and weaknesses

Chemically-modified cellulose paper as smart sensor device for colorimetric and optical detection of hydrogen sulfate in water

A portable, recyclable and highly selective paper-based sensor device for the colorimetric and optical detection of hydrogen sulfate anions in water was developed. The detection system features a rhodamine-based sensor covalently grafted onto the highly hydrophilic surface of cellulose paper

A paper-based biomimetic device for the reduction of Cu(II) to Cu(I) - application to the sensing of Cu(II)

A biomimetic device for the reduction of Cu(II) to Cu(I) consisting of thioglycolic acid covalently grafted to cellulose paper was developed. The device displays exceptionally fast reducing properties allowing the reduction of Cu(II) in seconds and the formation of deeply colored Cu(I)-SCH2R complexes onto the cellulose paper. This biomimetic and biomaterial-based concept was exploited for the detection of copper in water samples with a limit of detection as low as 2 ppm

Harnessing the Dual Properties of Thiol-Grafted Cellulose Paper for Click Reactions: A Powerful Reducing Agent and Adsorbent for Cu

A new approach exploiting the dual properties of thiol-grafted cellulose paper for promoting copper-catalyzed [3+2]-cycloadditions of organic azides with alkynes and adsorbing residual copper species in solution was developed. The thiol-grafted cellulose paper, used as a paper strip, effects the reduction of Cu-II to catalytically active Cu-I and acts as a powerful adsorbent for copper, thereby facilitating the work-up process and leaving the crude mixture almost free of copper residues after a single filtration

Chemically Modified Cellulose Filter Paper for Heavy Metal Remediation in Water

A chemically modified cellulose filter paper with ethylenediaminetetraacetic acid (EDTA) is described as a device for metal remediation. This new material was prepared by esterification of the paper with EDTA dianhydride. The high hydrophilicity of cellulose paper associated with the strong chelating properties of the EDTA moieties for metals allow the treatment of water samples containing various metal cations, including Ag(I), Pb(II), Ni(II), Sn(II), and Cu(II), with 90-95% removal efficiency. The mechanism of adsorption was deeply studied with the support of kinetic experiments and adsorption isotherms. As a practical feature, one can note that the cellulose EDTA material works at a wide range of pH values and can be used either as a solid adsorbent or a membrane for continuous wastewater treatment

Pleural ultrasonography, new standard for para pneumonic effusion? French multicentric prospective study. Preliminary report

European-Respiratory-Society (ERS) International Congress, Milan, ITALY, SEP 09-13, 2017International audienc