Oxidative oligomerisation of 1,4-diaminobenzene by copper and cobalt catalysts

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

“…235 Molar mass distribution measurements revealed that the products of oxidative polymerization of aryldiamines are low-to high-molar-mass oligomers rather than polymers. Oligo/polyaryldiamines have shown tunable electroactivity, 236 high permselectivity to various electroactive species, 237,238 unique electrochromism, 239 linear sensitivity of the conductivity to moisture, 240 controlled variation of the conductivity with temperature 241 and an external electric field, 242 high sensibilities of polymer-modified electrodes to biosubstances at an extremely low concentration, 243,244 good ability in detecting electro-inactive anions, 245 Oligo/polyaryldiamines have shown tunable electroactivity, 236 high permselectivity to various electroactive species, 237,238 unique electrochromism, 239 linear sensitivity of the conductivity to moisture, 240 controlled variation of the conductivity with temperature 241 and an external electric field, 242 high sensibilities of polymer-modified electrodes to biosubstances at an extremely low concentration, 243,244 good ability in detecting electro-inactive anions, 245 …”

Novel Michael Addition Products of Bis(amino acidato)metal(II) Complexes: Synthesis, Characterization, Dye Degradation, and Oxidation Properties

“…The complex was prepared according to general procedure A, using bis(Lalaninato)zinc ( (8) b ) 11.0249(4) b ) 11.5298(5) c ) 8.806 (5) c ) 6.4258(2) c ) 16.2837 (5) c ) 10.9835(4) R ) 97.129 (5) R ) 90 R ) 90 R ) 90 ) 100.281 (5) ) 110.672 (2) ) 109.1240 (10) ) 99.0850(10) γ ) 97.274 (5) γ ) 90 γ ) 90 γ ) 90 volume/Å 3 330.6(4) 749.52 (4) 1929. 29(11) 1071.16 (7 atoms, with C-H ) 0.97 Å and with U iso (H) values of 1.2 U eq (C) for hydrogen atoms.…”

“…4 Bisglycinatocopper(II) complexes, through some of their reactions, are also known to produce aggregates, which function as thermoelectric switches. 5 Some polymer-supported copper(II) complexes are also used as chiral catalysts. 6 Nuclear magnetic resonance and other studies have demonstrated that the protons on the R-carbon atom as well as those on the nitrogen atom of chelated amino acid complexes dissociate under alkaline conditions.…”

Chemical oxidative polymerization of benzocaine

“…Investigations were focused on the oxidation of ortho/meta-and N-substituted anilines since it was expected that ortho/meta-and Nsubstituted anilines can prevalently give NAC4 coupled oligomers/polymers upon the oxidation, similarly to PANI. Considerable attention has also been paid to the oxidative polymerization of para-substituted anilines [4-46], e.g., CH 3 A (p-toluidine) [4,5], CH 3 CH 2 A [6], (CH 3 ) 3 CA [7], C 6 H 5 A [8], H 2 NAC 6 H 4 A (benzidine) [9][10][11][12][13], N"CA [7,14], HOOCA (4-aminobenzoic acid) [14][15][16], FA [7,[17][18][19], ClA [5][6][7]14,18,20,21], BrA [7,14,18,21], JA [21], H 2 NA (p-phenylenediamine) [10,12,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36], C 6 H 5 ANHA (4-aminodiphenylamine) [37]…”

“…Peroxydisulfates (NH þ 4 , K + ) are most frequently used as oxidants [5,6,12,13,19,21,25,29,30,38,40,41,44]. Bromine [23], iodine [29], Fe(III) compounds [6,28,37], metal chelate/O 2 [27], tetrachloroauric acid [35], hydrogen peroxide without catalyst [31] and with horseradish peroxidase [32,42], cis-bisglycinato Cu(II)-monohydrate/Co(II)-dionemonoxime [34], silver nitrate [36], and sodium dichromate [46] are occasionally employed. The enzyme-catalyzed oxidative polymerization has also been studied [20,32,33,42].…”