Ferroelectric Polarization and Second Harmonic Generation in Supramolecular Cocrystals with Two Axes of Charge-Transfer

Ashwin Narayanan, Dennis Cao, Laszlo Frazer, Alok S. Tayi, Anthea K. Blackburn, Andrew C.H. Sue, John B. Ketterson, J. Fraser Stoddart*, Samuel I. Stupp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


Ferroelectricity in organic materials remains a subject of great interest, given its potential impact as lightweight information storage media. Here we report supramolecular charge-transfer cocrystals formed by electron acceptor and donor molecules that exhibit ferroelectric behavior along two distinct crystallographic axes. The solid-state superstructure of the cocrystals reveals that a 2:1 ratio of acceptor to donor molecules assemble into nearly orthogonal mixed stacks in which the molecules are positioned for charge-transfer in face-to-face and edge-to-face orientations, held together by an extended hydrogen-bonding network. Polarization hysteresis was observed along the face-to-face and edge-to-face axes at room temperature. The noncentrosymmetric nature of the cocrystals, required to observe ferroelectric behavior, is demonstrated using second harmonic generation measurements. This finding suggests the possibility of designing supramolecular arrays in which organic molecules support multidimensional information storage.

Original languageEnglish (US)
Pages (from-to)9186-9191
Number of pages6
JournalJournal of the American Chemical Society
Issue number27
StatePublished - Jul 12 2017

ASJC Scopus subject areas

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


Dive into the research topics of 'Ferroelectric Polarization and Second Harmonic Generation in Supramolecular Cocrystals with Two Axes of Charge-Transfer'. Together they form a unique fingerprint.

Cite this