Polyaniline (PANI) exists under 4 forms: eucoemaraldine, perigraniline, emaraldine and protonated emaraldine (Figure 1). The latter is conducting and their derivatives exhibit interesting features for the design of electrochemical sensors, rechargeable batteries, organic light emitting diodes (OLED) and solar cells. Recently, PANI received substantial attention as an 'ingredient' for the design of photovoltaic cells, notably dye sensitized solar cells (DSSCs). We recently explored the effect of replacing a fragment of PANI by the trans-Pt(C=C)2(PR3)2 unit (ChemComm, 2014  , 50, 350-352; Macromol. Rapid Comm. 2013  , 34, 511-515; Inorg. Chem., 2012  , 51, 13081-13095; ChemComm, 2012  , 48, 11542-11545) to form polymers P1a-e  , P2  and P3a-e . These materials were fully characterized by means of GPC and SAXS, and model compounds (X-ray structure determination, DFT computations). Their properties were addresses using electrochemistry, photophysics, UV-vis and luminescence spectroscopy. Clear evidence for electronic communication along the backbone of the polymers are detected, even in the reduced form, a communication secured by the N lone pair. Tautomeric forms were also detected in some cases when using amino-substituted anthraquinone diimine units.

Probing the Pt-organometallic versions of polyaniline: Surprising insights on the electronic communication in PANI

248th National Meeting (2014)

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