Photoluminescence and Raman spectroscopy studies on polyaniline/PbI{sub 2} composite

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.01.007· OSTI ID:21370344

Baibarac, M ^[1]; Baltog, I ^[1]; Lefrant, S ^[2]

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1. National Institute of Materials Physics, Laboratory Optics and Spectroscopy, Bucharest-Magurele, MG-7, R77125 (Romania)
2. Institut des Materiaux 'Jean Rouxel', 2 rue de la Houssiniere, B.P. 32229, 44322 Nantes Cedex 3 (France)

Functionalization of PbI{sub 2} with conjugated polymers (polyaniline-emeraldine base (PANI-EB) or polyaniline-emeraldine salt (PANI-ES)) is demonstrated by Raman and luminescence studies. PbI{sub 2}/PANI hybrid material was prepared by electrochemical polymerization of aniline onto the PbI{sub 2} modified Pt electrode and mechanico-chemical reaction between the two constituents. PANI interacting with the PbI{sub 2} gives rise to new Raman bands at 80, 144 and 170 cm{sup -1}. First line reveals the formation of 'stacking faults' that disrupt the I-Pb-I layers stacking along the c axis by the insertion of polymer molecules. The bands at 144 and 170 cm{sup -1} are attributed to the vibrational mode associated with Pb-NHR''{sub 2} (R''=C{sub 6}H{sub 4}) bond. The functionalization of PbI{sub 2} with PANI-EB brings forth the PANI-ES form. Depending on the semiconducting (PANI-EB) or conducting (PANI-ES) properties of the polymer in the PbI{sub 2}/PANI intercalated material, a partial or total collection of the charges generated under band to band irradiation is revealed by photoluminescence studies. - Graphical abstract: Experimental illustration of the extending along the c axis of a PbI{sub 2} single crystal by an intercalation process. In (a) is shown a crystal slide cleaved from a Bridgman-grown PbI{sub 2} crystal ingot and in (b) the same sample intercalated with pyridine obtained after an exposure for 24 h in a saturated atmosphere of pyridine.

• OSTI ID: 21370344
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMINES
ANILINE
AROMATICS
AZINES
CHEMICAL REACTIONS
CHEMISTRY
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CRYSTALS
ELECTROCHEMISTRY
EMISSION
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IODIDES
IODINE COMPOUNDS
LASER SPECTROSCOPY
LEAD COMPOUNDS
LEAD HALIDES
LEAD IODIDES
LUMINESCENCE
MONOCRYSTALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
POLYMERIZATION
POLYMERS
PYRIDINE
PYRIDINES
RAMAN SPECTROSCOPY
SPECTROSCOPY
STACKING FAULTS