Carboxylato bridging Cu(II) coordination polymer: Structure, magnetism and catalytic reduction of nitrophenols

The 1D coordination polymer, [Cu-2(mu(2)-OH)(2)(DABA)(2)](n) (1), (HDABA = 4-Diallylamino-benzoic acid) is characterized by Single crystal X-Ray diffraction analysis. The structure switches to a 2D geometry by hydrogen bonding interactions. Hand grinding aqueous suspension of the coordination polymer, 1 , present in nano regime of av. 100 nm dimension and shows catalytic performance in the reduction of toxic nitrophenols to corresponding aminophenols by NaBH4. The rate constant values (kappa(app)) are 2.4 x 10(-3) (4-NP), 5.3 x 10(-3) (2,4-DNP) and 5.6 x 10(-3) (2,4,6-TNP) s(-1) are much higher than reduction by only NaBH4. The susceptibility measurements (chi T-M) of Cu(II) coordination polymer indicates the presence of a very weak antiferromagnetic coupling between the metal centres. The hand grinding technique and reusability of 1 makes the approach chemically green, cost effective and attracts the attention towards the real-life application. (C) 2021 Published by Elsevier B.V.