@article{article03bace88,
title   = {Clay-porphyrin systems: spectroscopic evidence of TMPyP protonation, non-planar distortion and meso substituent rotation},
author = {Dias, Patrícia Moura and Faria, Dalva Lúcia Araújo de and Constantino, Vera Regina Leopoldo},
year = {2005},
doi = {10.1346/ccmn.2005.0530404},
journal   = {Clays and Clay Minerals}
}