Moderate molecular recognitions on ZnO m-plane and their selective capture/release of bio-related phosphoric acids†

Eisuke Kanao, Katsuya Nakano, Ryoma Kamei, Takuro Hosomi, Yasushi Ishihama, Jun Adachi, Takuya Kubo, Koji Otsuka, Takeshi Yanagida

Research output: Contribution to journalArticlepeer-review

Abstract

Herein, we explore the hidden molecular recognition abilities of ZnO nanowires uniformly grown on the inner surface of an open tubular fused silica capillary via liquid chromatography. Chromatographic evaluation revealed that ZnO nanowires showed a stronger intermolecular interaction with phenylphosphoric acid than any other monosubstituted benzene. Furthermore, ZnO nanowires specifically recognized the phosphate groups present in nucleotides even in the aqueous mobile phase, and the intermolecular interaction increased with the number of phosphate groups. This discrimination of phosphate groups in nucleotides was unique to the rich (101̄0) m-plane of ZnO nanowires with a moderate hydrophilicity and negative charge. The discrimination could be evidenced by the changes in the infrared bands of the phosphate groups on nucleotides on ZnO nanowires. Finally, as an application of the molecular recognition, nucleotides were separated by the number of phosphate groups, utilizing optimized gradient elution on ZnO nanowire column. Thus, the present results elucidate the unique and versatile molecular selectivity of well-known ZnO nanostructures for the capture and separation of biomolecules.

Original languageEnglish
Pages (from-to)1649-1658
Number of pages10
JournalNanoscale Advances
Volume4
Issue number6
DOIs
Publication statusPublished - Feb 17 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Materials Science(all)
  • Engineering(all)

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