Co(II) coordination polymers exhibiting reversible structural transformation and color change: A comparative analysis with Ni(II) analogue

Zn(ii) and Co(ii) coordination polymers based on semi-rigid bis-pyridyl-bis-amide and angular dicarboxylate ligands: synthesis, structures and properties

“…The orientations of the pyridyl rings and carbonyl group of L 1 and L 2 can be expressed as follows: 23 (1) cis and trans conformations are given if the two CO groups are in the same and in the opposite direction, respectively. (2) Because of the different orientations adopted by the pyridyl nitrogen atoms and the amide oxygen atoms, three more conformations, syn – syn , syn – anti and anti – anti , can also be found.…”

Structural transformations in cobalt(ii) coordination polymers constructed from flexible N,N′-bis(3-pyridylmethyl)sebacoamide and benzene-1,3,5-tricarboxylic acid

“…The ligand N,N′-bisIJ3-pyridylmethyl)sebacoamide (L) was prepared according to published procedures. 16,21 Preparation of {[CoIJL)IJ1,3,5-HBTC)]•H 2 O} n , 1 A mixture of CoIJCH 3 COO) 2 •4H 2 O (0.050 g, 0.20 mmol), L (0.076 g, 0.20 mmol), and 1,3,5-H 3 BTC (0.042 g, 0.20 mmol) in 5 mL of H 2 O was sealed in a 23 mL Teflon-lined steel autoclave, which was heated under autogenous pressure to 120 °C for two days, and then cooled down to room temperature for two days. Purple crystals were obtained.…”

A Pair of CoII Supramolecular Isomers Based on Flexible Bis-Pyridyl-Bis-Amide and Angular Dicarboxylate Ligands

“…The reagents Co(CH 3 COO) 2 •4H 2 O, Co(BF 4 ) 2 •6H 2 O and 4,4 -sulfonyldibenzoic acid (H 2 SDA) were purchased from Aldrich Chemical Co (St. Louis, MO, USA). The ligand N,N'-bis(pyrid-3ylmethyl)adipoamide (L) was prepared by using modified procedures for bpba ligands [13,23].…”