Reusable Silica supported Perchloric acid and potassium bisulphate as green catalysts for thiocyanation of aromatic compounds under solvent free conditions Journal title: Iranian Chemical Communication Authors: Chinna Rajanna Kamatala, Y. Hemanth Sriram, Touheeth Fatima, M. Satish Kumar, R. Madhusudan Raju Subject(s): Chemistry