Metal-Organic Framework Photoconductivity via Time-Resolved Terahertz Spectroscopy

Brian Pattengale, Jens Neu, Sarah Ostresh, Gongfang Hu, Jacob A. Spies, Ryotaro Okabe, Gary W. Brudvig, Charles A. Schmuttenmaer

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

While metal-organic frameworks (MOFs) have been under thorough investigation over the past two decades, photoconductive MOFs are an emerging class of materials with promising applications in light harvesting and photocatalysis. To date, there is not a general method to investigate the photoconductivity of polycrystalline MOF samples as-prepared. Herein, we utilize time-resolved terahertz spectroscopy along with a new sample preparation method to determine the photoconductivity of Zn2TTFTB, an archetypical conductive MOF, in a noncontact manner. Using this technique, we were able to gain insight into MOF photoconductivity dynamics with subpicosecond resolution, revealing two distinct carrier lifetimes of 0.6 and 31 ps and a long-lived component of several ns. Additionally, we determined the frequency dependent photoconductivity of Zn2TTFTB which was shown to follow Drude-Smith behavior. Such insights are crucially important with regard to developing the next generation of functional photoconductive MOF materials.

Original languageEnglish
Pages (from-to)9793-9797
Number of pages5
JournalJournal of the American Chemical Society
Volume141
Issue number25
DOIs
Publication statusPublished - Jun 26 2019

ASJC Scopus subject areas

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

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    Pattengale, B., Neu, J., Ostresh, S., Hu, G., Spies, J. A., Okabe, R., Brudvig, G. W., & Schmuttenmaer, C. A. (2019). Metal-Organic Framework Photoconductivity via Time-Resolved Terahertz Spectroscopy. Journal of the American Chemical Society, 141(25), 9793-9797. https://doi.org/10.1021/jacs.9b04338