Nano Co-Fe-prussian blue analogue as a reusable catalyst for the thiocyanation of aromatic and heteroaromatic compounds in presence of NH₄SCN under acid free solvothermal and solvent free conditions

Abstract

Co-Fe-Prussian blue analogue (Co-Fe-PBA) is developed as a reusable nano catalyst and characterized by XRD, SEM, TEM, and BET SA-PSD methods. It is used for the thiocyanation of aromatic and hetero aromatic compounds in presence of NH₄SCN under acid free solvothermal and solvent-free conditions. Observed Reaction times are dramatically reduced from solvothermal (15 to 20 hr) to sonication reactions (25 to 40 min), which are further reduced in mortar-pestle grinding (8 to 10 min) and in microwave assisted (4 to 7 min) protocols. Reaction products are confirmed by the well-established spectroscopic methods. Rate accelerations from solvothermal to greenery Sonication, microwave, and Mortar-Pestle grinding are explained suitably.

Keywords:

• Co-Fe-PBA
• Reusable Nano Catalyst
• NH₄SCN/ Thiocyanation
• Acid-free solvothermal and solvent-free reactions

Acknowledgements

Authors gratefully acknowledge to Head, Department of Chemistry, Osmania University, Hyderabad for facilities. Authors are grateful to Professor P. K. Sai Prakash (Former Dean, Faculty of Science, O.U), and Prof. T. Navaneeth Rao (Former Vice-chancellor, O.U), For Constant encouragement. Authors are thankful to CSIR-IICT, Hyderabad, and CFRD (Central Facilities for Research and Development), O.U. for providing spectroscopic studies. One of the authors (Vijay Shekar Pulusu) is highly thankful to CSIR, New, Delhi for the award of Junior Research Fellowship.

Disclosure statement

No potential conflict of interest was reported by the authors.