. 2022 Dec 23;13(1):674–687. doi: 10.1039/d2ra07077d

Comparison of the catalytic activity of PMA@MIL-53 (Fe) in the nitration of phenol with other reported catalyst systems in the literature.

Entry	Catalyst	Time (min)	Yield (%)			Ref
Entry	Catalyst	Time (min)	Total	Ortho	Para	Ref
1	Montmorillonite KSF	60	84	44	40	81
2	Tetrabutylammonium chromate	2880	80	44	36	82
3	[KHSO₄·2KHSO₅·K₂SO₄]	180	79	40	39	83
4	Cerium(iv) ammonium nitrate (CAN)	1440	69	28	41	84
5	Silica sulfuric acid	25	79	36	43	85
6	PMA@MIL-53 (Fe)	15	99.99	54.98	45.01	This work