VIBRATIONAL PROPERTIES OF POLYANILINE FUNCTIONALIZED PbI_2

摘要

Functionalization of PbI_2 with polyaniline-emeraldine base (PANI-EB) or polyaniline-emeraldine salt (PANI-ES) is demonstrated by Raman spectroscopy. Two functionalization methods were used: electrochemical polymerization of aniline onto the PbI_2 modified Pt electrode and the mechanico-chemical reaction between PANI and PbI_2. The functionalization induces changes in the Raman spectrum of PbI_2 that consist in the appearance of new Raman lines with the peaks at 80, 144 and 170 cm~(-1). The first line is the signature of the "stacking faults" that disrupt the stacking sequence of layers I-Pb-I atomic layers along the c crystalline axis by the intercalation of polymer molecules. The bands at 144 and 170 cm~(-1) are attributed to a vibrational mode associated to the Pb-NHR"_2 (R"= C_6H_4) bond.