fig1
![Fluorinated porous organic frameworks for C<sub>2</sub>F<sub>6</sub>/CF<sub>4</sub> gases separation](https://image.oaes.cc/14cc6b5a-2b09-479a-a043-ba6c7977a5d9/cs3079.fig.1.jpg)
Figure 1. FT-IR spectra of monomers and POFs: (A) SPPOF-4F; (B) SPPOF-8F; and XPS spectra enlarged views of C1s in (C) SPPOF-4F and (D) SPPOF-8F. FT-IR: Fourier transform infrared; POFs: porous organic frameworks; XPS: X-ray photoelectron spectroscopy.