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Hairpin-like structure and Jahn–Teller distortions in adenosine monophosphate copper coordination polymers: synthesis and chirality

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Nucleotides are fundamental units that make up nucleic acids and can be utilized to create functional materials with specific structures. The Jahn–Teller distortions provide information about the orientation of ligands that are coordinated with copper(II) in coordination materials. Herein, we are going to report two coordination polymers [Cu(AMP)(bpe)(H2O)3]·11H2O (1) and [Cu(AMP)(bpe)(H2O)3]·8H2O constructed by combining bipyridyl ethylene (bpe), adenosine monophosphate (AMP), and copper(II) ions, which were analyzed using single-crystal X-ray diffraction, FTIR, TGA, and chiral dichroism spectroscopy. The coordination polymers were examined to study their structural details related to hairpin-like structure and Jahn–Teller distortions. It was observed that the AMP’s chirality, or the way it twists, is maintained when AMP is combined with copper through noncovalent interactions. Our results indicate that the chirality of AMP with copper can be well preserved and delivered to its supramolecular architecture through noncovalent interactions. This research work sheds light on the self-assembly of purine nucleotide hairpins in coordination polymers and their characterization. To the best of our knowledge, Jahn–Teller distortion and hairpin-like structures in nucleotide coordination polymers have been discussed rarely. Nucleotide coordination polymers can be used for potential applications in the fields such as fluorescent detection, medicine, artificial data storage, and energy devices.

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This work was financially supported by the National Natural Science Foundation of China. I acknowledge that Rizwan Shoukat performed this work in the framework of the international Ph.D. in Innovation Sciences and technologies at the Università degli Studi di Cagliari, Italy.

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Correspondence to Muhammad Javed Iqbal or Hui Li.

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Iqbal, M.J., Shoukat, R., Talha, K. et al. Hairpin-like structure and Jahn–Teller distortions in adenosine monophosphate copper coordination polymers: synthesis and chirality. Chem. Pap. 77, 5687–5699 (2023).

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