Cobaltabisdicarbollide anion [Co(C2B9H11)2]− as doping agent on intelligent membranes for ion capture

Synthesis and electropolymerization of a series of 2,2′-(ortho-carboranyl)bisthiophenes

“…-(6) was used as doping agent for the electropolymerization of monomers; [16][17][18][19] (ii) pyrrole and thiophene monomers were modified by functionalization at the 2-position [20] and the N-position (e.i. 7) [21] with anion (6), followed by electropolymerization to form the self-doped polymers under suitable conditions; (iii) monomers were modified by using neutral carboranes (o-, m-, p-) at the 2-position [22,23] and at the 3 and/or 4-positions (e.g.…”

Synthesis, structure and electrical conductivity of fulvalenium salts of cobalt bis(dicarbollide) anion

“…x (°) S(3)-C(5)-S (4) 115 ( 7) 116(4) S(7)-C(9)-C(10) 118(5) S(1)-C(3)-S (3) 114 (3) S(8)-C(10)-C (9) 117 (3) …”

“…All these salts are based on iron, nickel, and chromium bis(dicarbollide) anions, and no radical cation salt derived from the cobalt bis(dicarbollide) anion [3,3 0 -Co(1,2-C 2 B 9 H 11 ) 2 ] À , the most studied metallacarborane [5], was reported. The cobalt bis(dicarbollide) anion and its derivatives are of interest for extraction of radionuclides from radioactive waste [6][7][8], as components of ion-selective electrodes [9,10], weakly-coordinating anions [11], for synthesis of agents for boron neutron capture therapy [12][13][14], radionuclide diagnostics [15], and HIV protease inhibitors [16]. In this contribution, we describe the syntheses of tetramethyltetraselenafulvalenium, tetrathiafulvalenium, and bis(ethylenedithio)-tetrathiafulvalenium salts of the cobalt bis(dicarbollide) anion as well as the results of their X-ray structure and electric conductivity studies.…”

Electropolymerization of nano-dimensioned polypyrrole micro-ring arrays on gold substrates prepared using submerged micro-contact printing

“…This process is known as over-oxidation and it means that the material has been irreversible damaged. polypyrrole doped with conventional anions (such as ClO 4ˉ, PF 6ˉ) produces an ORL of ~900 mV (with reference to an Ag/AgCl/KCl sat reference), whereas polypyrrole doped with a cobaltabisdicarbollide anion ([Co(C 2 B 9 H 11 ) 2 ]ˉ) [14][15][16] produces an ORL which is 300 mV more anodic, i.e. ~1.2 V [14].…”

“…2 ]ˉ anion, whose molecular structure is depicted in figure 1, is a non-nucleophilic, large volume, lipophilic species which retains a low charge density and which is non-coordinating. It is hydrophobic and highly chemically resistant, meaning it is stable in the polymer matrix even when subjected to strong acid/base conditions, and, upon polymer oxidation-reduction, it participates in cation exchange [14][15][16]. Polypyrrole doped with this anion is therefore an interesting material for the production of electrically conducting polypyrrole nanostructures.…”