Chiral 1D Metal–Organic Materials Based on Cu(II) and Amino Acid Schiff Bases

Carlos Cruz, Carla Gonzalez, Francisco Rubio, Juan Erices, Kerry Wrighton-Araneda, Diego Cortés-Arriagada, Diego Venegas-Yazigi, Nathalie Audebrand, Verónica Paredes-García

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Four new chiral coordination polymers (CPs), {[Cu(HLn)MeOH]·NO3} (n = 1–4), were obtained using a chiral building block synthesized from the condensation reaction of l- or d-valine with an imidazole aldehyde. These CPs crystallize in a noncentrosymmetric space group P212121, evidencing that the chirality of the α-amino acid valine is transferred to the structure of the coordination polymer. Moreover, the CPs present a 1D structure with a Cu(II) cation in a square base pyramid geometry formed by two units of chiral ligand and a methanol molecule. The magnetic measurement and theoretical calculations show that the Cu(II) spin carriers are magnetically communicated through the carboxylate bridge, presenting a 1D ferromagnetic chain behavior. Furthermore, four new stable molecular compounds [Cu(HLn)DMSO]+ (n = 1–4), sharing the same chiral building block of CPs, were characterized by circular dichroism (CD). The theoretical electronic excited states of the molecular compounds reproduce the CD experimental spectra showing that the intrinsic chiral activity of the α-amino acid Schiff base is transferred to the Cu(II) centers. Remarkably, using crystal engineering tools, a family of chiral coordination compounds was obtained and analyzed combining several experimental and theoretical approaches, leading to a robust understanding of its chemical and physical properties.

Original languageEnglish
Pages (from-to)237-250
Number of pages14
JournalCrystal Growth and Design
Volume22
Issue number1
DOIs
Publication statusPublished - 5 Jan 2022

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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