Polyaniline Salts and Complexes as Catalyst in Bisindole Synthesis

Conjugated Polymers as Heterogeneous Catalyst in Organic Synthesis

“…Similarly bisindole (3,3'-bis(indolyl)phenylmethane) was obtained in excellent yields with simple and environmentally more benign procedure using polyaniline salts [18], which were prepared by doping of polyaniline base with different Bronsted acids (H 2 SO 4 , HNO 3 and H 3 PO 4 ), organic acid (ptoluenesulfonic acid (PTSA)) and iodine (I 2 ). Polyaniline complexes were also prepared using Lewis acids (BF 3 , AlCl 3 and SnCl 2 ).…”

Polyvinylsulfonic acid as a novel Brønsted acid catalyst for the synthesis of bis(indolyl)methanes

“…Hence, it necessitates having more than stoichiometric amounts of Lewis acid in the reaction mixture (4). A number of synthetic methods for preparation of bis(indolyl)alkane derivatives have been reported in the literature in the presence of either a Lewis acids, such as molecular iodine (5), lithium perchlorate (6), Dy(OTf) 3 (7), TiO 2 (8), sodium dodecylsulfonate (9), ZrOCl 2 /silica gel (10), polyindole salts (11), phosphated zirconia (12), and polyaniline (13), tungstophosphoric acid/zirconia (14), CeCl 3 ×7H 2 O (15), Ru III complexes (16), or protic acids like glycerol as a promoter (17), phosphorodiamidic acid (18), SBA-15 supported poly(4-styrenesulfonyl(perfluorobutylsulfonyl)imide) (19), Brønsted acidic ionic liquids (20,21), cellulose sulfuric acid (22), PEG-supported sulfonic acid (23), and tetrabutylammonium tribromide (24).…”

Two-Dimensional Texture of Intrinsic Conductive Poly(styrene-co-maleanilic Acid) Grafted with Polyaniline: Formation and Conductivity

“…Notably, polyaniline (PANI), polypyrrole (PPy), polythiophene (PT), polyacetylene (PA), poly(p-phenylenevinylene (PPV) and their derivatives have attracted the interest of researchers in multidisciplinary fields primarily for their unique structural and electronic properties. Their applications in a wide variety of advanced technical and biotechnical devices have prompted intensive research into their opto-electronic, electro-optical, chemical, electrochemical, biochemical, bioactive, and biomechanical characteristics [9][10][11][12][13][14][15][16][17][18]. Of particular importance is their exploitation in organic light emiting diodes (OLED) [9], solar photovoltaic (solar cells) [10], rechargeable batteries [12], fuel cells [13], sensors [14], actuators [15], protective coatings [16], catalysis [17], tissue engineering, and drug-delivery systems [18], to name a few.…”