An Unusual 3D Coordination Polymer Based on Bridging Interactions of the Nucleobase Adenine

Abstract

The first 3D coordination polymer containing a nucleobase as a bridging ligand, [[Cu2(mu-ade)4(H2O)2][Cu(ox)(H2O)]2 x approximately 14H2O]n (1), has been synthesized by reaction of adenine (Hade) with a basic solution of K2[Cu(ox)2] x 2H2O (ox = oxalato dianion). Compound 1 crystallizes in the trigonal space group R3 with a = b = 31.350(1) angstroms, c = 14.285(1) angstroms, V = 12158.7(10) angstroms3, and Z = 9. X-ray analysis shows a covalent 3D network in which the copper(II) centers are bridged by tridentate mu-N3,N7,N9 adeninate ligands. The compound has relatively large, nanometer-sized tubes associated with the self-assembly process directed solely by metal-ligand interactions. The covalent 3D framework remains intact upon removal of the guest water molecules trapped in the nanotubes. Magnetic measurements indicate an overall antiferromagnetic behavior of the compound.

Biologically derived metal organic frameworks

“…To date, the most commonly reported bio-MOFs are based on Adenine (Ade). [52,[115][116][117][118][119][120] Despite the advantages, bio-MOFs containing nucleobases are not exhaustive, which may be the result of no control over their binding modes to metal ions, and their inherent lack of symmetry which inhibit packing in the formation of crystalline materials. Most of the examples reported in the literature highlight the rich coordination modes of Ade leading in the formation of highly porous bio-MOFs.…”

Light-Activated Metal-Coordinated Supramolecular Complexes with Charge-Directed Self-Assembly

“…17 Garcia-Teran et al reported a complex formed by adenine and Cu. 18 Rosi and co-workers synthesized a metal-organic framework using Zn(II) and adenine, where Zn was coordinated via oxygen and controlled drug release was demonstrated. 19 Kimizuka and co-workers prepared supramolecular networks of adenosine monophosphate (AMP) with various lanthanides, where both oxygen and nitrogen ligands are proposed to participate in metal binding.…”

Base nitrogenatuak konposatu metal-organiko porotsuak eraikitzeko baliabide: zenbait adibide

“…Adeninaz eratutako lehenengo MOFen artean [Cu 4 (μ 3 -adeninato-κN3:κN7:κN9) 4 (oxalato) 2 (H 2 O) 4 ] n koordinazio konposatua aipa dezakegu [10]. Konposatu horretan [Cu 2 (μ-adeninato) 4 …”