Tunable Crystallinity and Charge Transfer in Two-Dimensional G-Quadruplex Organic Frameworks

Yi Lin Wu*, N. Scott Bobbitt, Jenna L. Logsdon, Natalia E. Powers-Riggs, Jordan N. Nelson, Xiaolong Liu, Timothy C. Wang, Randall Q. Snurr, Joseph T. Hupp, Omar K. Farha, Mark C. Hersam, Michael R. Wasielewski

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


DNA G-quadruplex structures were recently discovered to provide reliable scaffolding for two-dimensional organic frameworks due to the strong hydrogen-bonding ability of guanine. Herein, 2,7-diaryl pyrene building blocks with high HOMO energies and large optical gaps are incorporated into G-quadruplex organic frameworks. The adjustable substitution on the aryl groups provides an opportunity to elucidate the framework formation mechanism; molecular non-planarity is found to be beneficial for restricting interlayer slippage, and the framework crystallinity is highest when intermolecular interaction and non-planarity strike a fine balance. When guanine-functionalized pyrenes are co-crystallized with naphthalene diimide, charge-transfer (CT) complexes are obtained. The photophysical properties of the pyrene-only and CT frameworks are characterized by UV/Vis and steady-state and time-resolved photoluminescence spectroscopies, and by EPR spectroscopy for the CT complex frameworks.

Original languageEnglish (US)
Pages (from-to)3985-3989
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number15
StatePublished - Apr 3 2018


  • G-quadruplexes
  • charge-transfer complexes
  • crystal engineering
  • organic frameworks
  • self-assembly

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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