Directional Electron Transfer in Crystals of [CrCo] Dinuclear Complexes Achieved by Chirality-Assisted Preparative Method

Shinji Kanegawa, Yoshihito Shiota, Soonchul Kang, Kazuyuki Takahashi, Hajime Okajima, Akira Sakamoto, Tatsuya Iwata, Hideki Kandori, Kazunari Yoshizawa, Osamu Sato

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The polarization switching mechanism is used in various devices such as pyroelectric sensors and memory devices. The change in polarization mostly occurs by ion displacement. The development of materials whose polarization switches via electron transfer in order to enhance operation speed is a challenge. We devised a synthetic and crystal engineering strategy that enables the selective synthesis of a [CrCo] heterometallic dinuclear complex with a polar crystal structure, wherein polarization changes stem from intramolecular charge transfer between Co and the ligand. Polarization can be modulated both by visible-light irradiation and temperature change. The introduction of chiral ligands was paramount to the successful polarization switching in the valence tautomeric compound. Mixing Cr and Co complexes with enantiopure chiral ligands resulted in the selective formation of only pseudosymmetric [CrCo] heterometallic complexes. Furthermore, the left-handed chiral ligands preferentially interacted with their right-handed counterparts, enabling molecules to form a polar crystal structure.

Original languageEnglish
Pages (from-to)14170-14173
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number43
DOIs
Publication statusPublished - Nov 2 2016

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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