A facile synthesis of contorted spirobisindane-diamine and its microporous polyimides for gas separation
Shrestha, B. B., Wakimoto, K., Wang, Z. G., Isfahani, A. P., Suma, T., Sivaniah, E. & Ghalei, B.
RSC advances 8, 6326-6330, doi:10.1039/c7ra12719g (2018).