Reduction of nitroarenes to corresponding arylamines using NaBH₄ catalyzed by the Fe₃O₄@SiO₂@KCC-1@MPTMS@Cu^II nanocomposite in water^f.

Entrya	Substrate	Product	RMCRb	Time (min)	Yieldc (%)	TONd	TOFe (min−1)
1			1 : 2 : 10	5	98	44.166	8.833
2			1 : 2 : 10	3	95	42.814	14.271
3			1 : 2 : 10	3	94	42.364	14.121
4			1 : 2 : 10	3	94	42.364	14.121
5			1 : 2 : 10	4	96	43.265	10.816
6			1 : 2 : 10	5	96	43.265	8.653
7			1 : 2 : 10	4	93	41.913	10.478
8			1 : 2 : 10	4	93	41.913	10.478
9			1 : 2 : 10	3	94	42.364	14.121
10			1 : 2 : 10	4	97	43.716	10.929
11			1 : 2 : 10	3	95	42.814	14.271
12			1 : 4 : 20	4	92	20.731	5.182
13			1 : 4 : 20	5	93	20.956	4.191
14			1 : 4 : 20	5	95	21.407	4.281
15			1 : 4 : 20	4	96	21.632	5.408
16			1 : 4 : 20	5	92	20.731	4.146

^aAll reactions were carried out in 3 mL of the water solvent.

^bRMCR (reaction main components ratio) = substrate (mmol) : NaBH₄ (mmol) : catalyst (mg).

^cYields refer to isolated pure products.

^dTON (turnover number) = [(mol of product formed)/(mol of catalyst used)].

^eTOF (turnover frequency) = [(mol of product formed)/(mol of catalyst used) × (time)].

^fThe TONs and TOFs values were calculated based on the existed amount of copper (Cu) in the as-prepared nanocatalyst (in 10 mg of the mesoporous nanocatalyst, 1.41 mg (or 0.022188650 mmol) of Cu has existed).