Correction
The authors regret to have overlooked an error in (Figure five) of the original version of this article [1]. The original, incorrect form (Figure 1), and the corrected form (Figure 2) are shown in this article.
Figure 1.

Synthesis of PIM-1, a-reagent and condition, K2CO3, DMAc and DEB at 150°C for 1 h (Incorrect form).
Figure 2.

Synthesis of PIM-1, a-reagent and condition, K2CO3, DMAc and DEB at 150°C for 1 h (Corrected form).
Footnotes
The online version of the original article can be found at 10.1186/1556-276X-7-504
Contributor Information
Muntazim Munir Khan, Email: muntazim.khan@hzg.de.
Volkan Filiz, Email: volkan.filiz@hzg.de.
Gisela Bengtson, Email: gisela.bengtson@hzg.de.
Sergey Shishatskiy, Email: sergey.shishatskiy@hzg.de.
Mushfequr Rahman, Email: mushfequr.rahman@hzg.de.
Volker Abetz, Email: volker.abetz@hzg.de.
References
- 1.Khan MM, Filiz V, Bengtson G, Shishatskiy S, Rahman M, Abetz V. Functionalized carbon nanotubes mixed matrix membranes of polymers of intrinsic microporosity for gas separation. Nanoscale Res Lett. 2012;7:504. doi: 10.1186/1556-276X-7-504. [DOI] [PMC free article] [PubMed] [Google Scholar]
