A green alternative to synthetize azo compounds

Highly effective solid phase extraction of some heavy metal ions using a cartridge filled with imprinted silica-supported N4O4 type bis(diazoimine) ligands

“…Schiff base ligands can provide the opportunities to design new systems for selective extraction of specific metallic ions and they can form stable complexes with metal ions [1,2]. Diazonium cations are very important intermediates in the synthesis of derivatized organic and inorganic compounds because of their good electrophilic properties [3][4][5]. Even though many studies have been reported on the synthesis of mono(aryldiazonium) cations ArN þ 2 , synthesis of novel solid-supported bis(diazoimine) ligands and their solid phase extraction properties using syringe technique can be considered as a new area [6][7][8][9][10][11][12][13].…”

<span>Synthesis, Identification and Application Studies of a Cu(II)</span> <span>C</span><span>omplex with1,1&rsquo;,((1E,1&rsquo;E)-1,2-phenylene bis (diazene-2,1-diyl))bis(naphthalen-2-ol)</span><span></span>

“…The C=C is seen at 1625 and 1598 cm -1 . The peak at 1512 cm -1 is attributed to N=N stretching vibration [5,6]. The DRS spectrum is illustrated in Fig.…”

Synthesis, characterization and solid‐phase extraction properties of novel bis(diazo‐azomethine) ligands supported on mesoporous silica

“…Due to the aliphatic structure of primary amine groups, the modified ferric nitrate method was used in order to synthesize this compound . 1,3‐ bis (Aminomethyl)benzene (1 mmol, 0.1376 g, 99%) was dissolved in 10 ml acetonitrile, and HCl:H 2 O (1:1) solution was dropped in slowly while stirring for 30 min; 1 mmol Fe(NO 3 ) 3∙ 9H 2 O dissolved in acetonitrile was added to the acidified‐diamine solution.…”

“…Research has focused on the synthesis and investigation of the catalytic and adsorption properties of silica‐supported diazo‐imine compounds because these types of compounds are chemically stable in hard catalytic reactions and solid‐phase extraction applications . Because of the excellent electrophilic properties of diazonium cations, which are the substantial coupling intermediates, they can be used in the obtaining of compounds . Numerous studies have been published about mono‐aryldiazonium salts ArN 2 + ; however, novel synthetic derivatives and applications of bis (aryldiazo) compounds have not been sufficiently reported .…”