Crystal growth and characterization of fluorinated perylene diimides
Jiachi Huang , Hanying Li , Xiong Mo , Minmin Shi , Mang Wang , Hongzheng Chen
Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (1) : 63 -67.
Crystal growth and characterization of fluorinated perylene diimides
One-dimensional crystals of fluorinated perylene diimides were achieved by the self-assembly of them via solvent-nonsolvent exchanging. The π-conjugated fluorinated perylene diimides were assembled into highly-ordered nanostructures of well-defined morphologies in organic solvents due to the π-π interaction between the aromatic cores. It was found that with more introduced F atoms, perylene diimides showed remarkably improved solubility and thus were much easier to grow into crystals, due to the increased polarity induced by the strong electron-withdrawing F group. More importantly, single crystal of N,N′-diperfluorophenyl-3,4,9,10-perylenetetracarboxylic diimide(DPFPP) was obtained, and the unit cell-dimensions of triclinic structure were determined by the selected area electron diffraction( SAED) patterns to be a=0.712 nm, b=1.072 nm, c=2.914 nm, α=97.0°, β=89.6°, γ=93.4°. Owing to most of the longest c-axis orienting nearly vertically to the long axis of the needle crystal, the molecular planes are expected to be vertical to the needle axis.
Perylene diimide / Fluorination / Crystal growth
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