@misc{roeder_protonation_of_2007, 
author={Roeder, J., Gomes, D., Ponce, M.L., Abetz, V., Pereira Nunes, S.},
title={Protonation of Sulfonated Poly(4,4’-diphenylether-1,3,4-oxadiazole) Membranes},
year={2007},
howpublished = {journal article},
doi = {https://doi.org/10.1002/macp.200600515},
abstract = {band shifts are associated to the interaction between acid groups and oxadiazole ring nitrogen atoms. The IR spectra evidenced the presence of three absorption species (HSO4, SO2 4 and free H2SO4) depending on the sulfuric acid concentration. For the protonated SPOD-DPE membranes, a proton conductivity around 10 mScm1 was reached at 50 8C.},
note = {Online available at: \url{https://doi.org/10.1002/macp.200600515} (DOI). Roeder, J.; Gomes, D.; Ponce, M.; Abetz, V.; Pereira Nunes, S.: Protonation of Sulfonated Poly(4,4’-diphenylether-1,3,4-oxadiazole) Membranes. Macromolecular Chemistry and Physics. 2007. vol. 208, 467-473. DOI: 10.1002/macp.200600515}}