Morphology-controlled approach for bulk synthesis of conducting poly (5-aminoindole)

Self‐Assembly of Solution‐Processable Polyindole via Langmuir‐Blodgett Technique: An Insight to Layer‐Dependent Charge Transport and Electronic Parameters

“…Other peaks at δ‐values around 8.08, 7.86, 6.95 and 6.78‐6.38 ppm correspond to H‐4, H‐7, H‐5 and H‐6 aromatic protons of monomeric unit that are persistent in PIn respectively. These values are in accordance to previous reports, thus verifying the 2,3‐linkage in PIn ,…”

“…Electrochemically synthesized PIn was characterized via 1 H‐NMR and FT‐IR spectroscopy for its 2,3‐linkage and N−H bond existence. Figure (a) indicates proton chemical shift (δ‐value) at 10.93 ppm validating the existence of N−H bond ,. Other peaks at δ‐values around 8.08, 7.86, 6.95 and 6.78‐6.38 ppm correspond to H‐4, H‐7, H‐5 and H‐6 aromatic protons of monomeric unit that are persistent in PIn respectively.…”

“…Also, N−H bond deformation at 1610 cm −1 validate its persistence after polymerization. Peaks around 1600–1400 cm −1 region peaks arise due to C−C stretching modes of benzene ring . Peak at 1103 cm −1 designates to aromatic C−N stretch and peak at 736 cm −1 (C−H bend; out‐of‐plane deformation) validates non‐involvement of benzene ring in polymerization ,.…”

“…Thenafter, band gap (E g ) of PIn LB film was calculated from the absorbance spectra of the PIn (inset of Figure (a)). If absorption coefficient is denoted by α, energy of absorbed light is denoted by h 𝒱 then optical bandgap of the polymer is estimated by fundamental relation given by, …”

“…Recently, PIn (inset of Figure (a)) and its derivatives being a new class of conductive polymers, have attracted significant scientific interest due to its ease in synthesis via chemical and electrochemical route, excellent redox activity, thermal stability, low toxicity, good electrochromic properties, electrocatalytic properties, electronic property and sensing property . However, their two most important downsides i. e. poor conductivity and poor solubility in common volatile organic solvents have plagued them for practical applications and fabrication of devices.…”