Effect of aliphatic dicarboxylate tether on topology in luminescent cadmium coordination polymers containing bis(4-pyridylformyl)piperazine

Add time:09/28/2019    Source:infona.pl

Hydrothermal synthesis has generated a series of luminescent cadmium aliphatic dicarboxylate coordination polymers containing the neutral multitopic bis(4-pyridylformyl)piperazine (bpfp) ligand, which were characterized by single-crystal X-ray diffraction, luminescence spectroscopy. {[Cd(suc)(bpfp)(H 2 O)]·2H 2 O} n (1, suc=succinate) has a simple yet very rare 4-connected 6 5 8 layered topology. {[Cd(dmg)(bpfp)(H 2 O)]·H 2 O} n (2, dmg=2,2-dimethylglutarate) also shows a 4-connected net, but with a 3-fold interpenetrated sra 4 2 6 3 8 topology. {[Cd(Hemg) 2 (bpfp)(H 2 O)]·2H 2 O} n (3, emg=3-ethyl, 3-methylglutarate) is a simple 1-D chain coordination polymer. {[Cd 2 (adp)(bpfp) 2 (H 2 O) 2 ](ClO 4 ) 2 ·2H 2 O} n (4, adp=adipate) has {Cd 2 O 2 } dimeric units linked by adp and exotridentate bpfp ligands into a rare (3,8)-connected tfz-d binodal topology. The oxoanion free derivative [Cd(adp)(bpfp)] n (5) shows a non-interpenetrated 6-connectd pcu topology.

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