Metal–Organic Framework Membrane Nanopores as Biomimetic Photoresponsive Ion Channels and Photodriven Ion Pumps

Yanan Jiang, Wenjie Ma, Yujuan Qiao, Yifei Xue, Jiahao Lu, Jun Gao*, Nannan Liu, Fei Wu, Ping Yu, Lei Jiang, Lanqun Mao*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)

Abstract

Biological ion channels and ion pumps with sub-nanometer sizes modulate ion transport in response to external stimuli. Realizing such functions with sub-nanometer solid-state nanopores has been an important topic with wide practical applications. Herein, we demonstrate a biomimetic photoresponsive ion channel and photodriven ion pump using a porphyrin-based metal–organic framework membrane with pore sizes comparable to hydrated ions. We show that the molecular-size pores enable precise and robust optoelectronic ion transport modulation in a broad range of concentrations, unparalleled with conventional solid-state nanopores. Upon decoration with platinum nanoparticles to form a Schottky barrier photodiode, photovoltage across the membrane is generated with “uphill” ion transport from low concentration to high concentration. These results may spark applications in energy conversion, ion sieving, and artificial photosynthesis.

Original languageEnglish
Pages (from-to)12795-12799
Number of pages5
JournalAngewandte Chemie - International Edition
Volume59
Issue number31
DOIs
Publication statusPublished - 27 Jul 2020

Keywords

  • ion transport
  • membranes
  • metal–organic frameworks
  • nanopores
  • photodriven ion pumps

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