Issue 42, 2021

Cobalt(ii) coordination polymers constructed from bis(N-pyrid-3-ylmethyl)adipoamide and polycarboxylic acids: reversible structural transformation upon proton delivery and removal

Abstract

Hydrothermal reactions of cobalt(II) salts and bis(N-pyrid-3-ylmethyl)adipoamide (L) with various polycarboxylic acids in water and NaOH solutions afforded {[Co(L)0.5(1,3,5-HBTC)(H2O)]·H2O}n (1,3,5-H3BTC = benzene-1,3,5-tricarboxylic acid), 1, {[Co1.5(L)1.5(1,3,5-BTC)(H2O)4]·4H2O}n, 2, [Co(L)(5-tert-IPA)(H2O)2]n (5-tert-H2IPA = 5-tert-butylbenzene-1,3-dicarboxylic acid), 3, and {[Co(L)(5-NH2-IPA)]·H2O}n (5-NH2-H2IPA = 5-aminoisophthalic acid), 4, respectively, which have been structurally characterized by using single crystal X-ray crystallography. Complexes 1–3 display two-dimensional (2D) networks, showing bey, bex and hcb topologies, respectively, while complex 4 exhibits a three-dimensional (3D) framework with the xww topology (standard representation), which can be further simplified as the tfz-d topology (cluster representation), revealing the structure-directing roles of the substituent groups on the polycarboxylate ligands. Reversible structural transformation upon delivery and removal of H+ in 1 and 2 is observed, which can be ascribed to the various bonding modes of the benzene-1,3,5-tricarboxylate anions and the flexible nature of L.

Graphical abstract: Cobalt(ii) coordination polymers constructed from bis(N-pyrid-3-ylmethyl)adipoamide and polycarboxylic acids: reversible structural transformation upon proton delivery and removal

Supplementary files

Article information

Article type
Paper
Submitted
08 Ndz 2021
Accepted
01 Nhl 2021
First published
01 Nhl 2021

CrystEngComm, 2021,23, 7471-7478

Cobalt(II) coordination polymers constructed from bis(N-pyrid-3-ylmethyl)adipoamide and polycarboxylic acids: reversible structural transformation upon proton delivery and removal

J. Hu, Y. Liu and J. Chen, CrystEngComm, 2021, 23, 7471 DOI: 10.1039/D1CE01216A

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