Nano silica chromic acid/wet SiO2 and NaNO2 as an efficient reagent system for synthesis of azo dyes based on 1-naphthol at room temperature and solvent-free conditions
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Abdolhamid Bamoniri; Bi Bi Fatemeh Mirjalili; Arash Ghorbani-Choghamarani; Mohammad E. Yazdanshenas; Abbas Shayanfar; Ahmad Akbari