Title Cu1.5PMo12O40as an efficient, mild and heterogeneous catalyst for the condensation of indole with carbonyl compounds Type Article Keywords Bis(indoyl)methanes· Cu1.5PMo12O40 · Tetraethylammonium chloride· Catalytic condensation· Copper catalyst Abstract Bis(indoyl)methanes have been synthesized in excellent yields in the presence of catalytic amount of Cu1.5PMo12O40in molten tetraethylammonium chloride as an ionic liquid. The catalyst is recovered and recycled Researchers neda Seyedi (First researcher)Hojatollah Khabazzadeh (Second researcher)Kazem Saidi (Third researcher)