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Issue 40, 2020
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Co(ii) coordination polymers constructed from a bent chiral linker: influencing framework topology using co-ligands

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Abstract

A semi-rigid chiral ligand (1R, 2R)-4,4′-(trans-cyclohexane-1,2-diyl)bis(azanediyl)bis(carbonyl) dibenzoic acid (H2cbba) was combined with various Co(II) salts and dipyridyl co-ligands to obtain four 2D homochiral coordination polymers of composition [Co(cbba)(dipyridyl)]·solvate (dipyridyl = 4,4′-bipyridyl (bipy), bis(4-pyridyl)ethylene (bpe), 1,4-bis(4-pyridyl)benzene (1,4-bpb), 2,5-bis(4-pyridyl)thiazolo [5,4-d]thiazole (2,5-bptztz)) (1–4). The topology of the frameworks is mediated by the length of the co-ligands, with short dipyridyl co-ligands (4,4′-bipy and bpe) resulting in the formation of (413·62) networks (1–2), while long co-ligands (1,4-bpb and 2,5-bptztz) led instead to (44·62) (sql) networks that undergo 2D → 2D parallel interpenetration to form a rare example of a homochiral polyrotaxane (3–4). The length of the dipyridyl co-ligand was also found to have an effect on the conformation of the flexible cbba2− ligands and the crystal packing of the networks.

Graphical abstract: Co(ii) coordination polymers constructed from a bent chiral linker: influencing framework topology using co-ligands

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Article information


Submitted
11 Aug 2020
Accepted
14 Sep 2020
First published
16 Sep 2020

CrystEngComm, 2020,22, 6690-6698
Article type
Paper

Co(II) coordination polymers constructed from a bent chiral linker: influencing framework topology using co-ligands

H. M. Tay and C. Hua, CrystEngComm, 2020, 22, 6690
DOI: 10.1039/D0CE01172J

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