Crystals (Mar 2020)

(Perylene)<sub>3</sub>-(TCNQF<sub>1</sub>)<sub>2</sub>: Yet Another Member in the Series of Perylene–TCNQF<sub>x</sub> Polymorphic Charge Transfer Crystals

  • Tommaso Salzillo,
  • Raffaele G. Della Valle,
  • Elisabetta Venuti,
  • Aldo Brillante,
  • Gabriele Kociok-Köhn,
  • Daniele Di Nuzzo,
  • Matteo Masino,
  • Alberto Girlando

DOI
https://doi.org/10.3390/cryst10030177
Journal volume & issue
Vol. 10, no. 3
p. 177

Abstract

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The 3:2 Charge Transfer (CT) co-crystal (Perylene)3(TCNQF1)2 is grown by the Physical Vapor Transport (PVT) method, and characterized structurally and spectroscopically. Infrared analysis of the charge sensitive modes reveals a low degree of charge transfer (less than 0.1) between donor and acceptor molecules. The crystal is isostructural to the other 3:2 CT crystals formed by Perylene with TCNQF2 and TCNQF4, whereas such stoichiometry and packing is not known for the CT crystals with non-fluorinated TCNQ. The analysis of the isostructural family of 3:2 Perylene−TCNQFx (x = 1,2,4) co-crystal put in evidence the role of weak F…HC bonding in stabilizing this type of structure

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