Third order nonlinear optical susceptibility of polyaniline

Nonlinear Optical Properties of Halogenated Aniline Oligomers

“…As shown in Table 3, the hexamer of the pernigraniline containing fluorine and dimethylamine displays the highest  value. In relation to , emeraldine presents the best perfomance; pernigraniline has an intermediary value, and leucoemeraldine exhibits the smallest magnitude (Maciel et al, 1998;Halvorson et al, 1993;Osaheni et al, 1992). The results indicate that our selected substitution pattern effectively increases the  values of the pernigraniline and emeraldine oligomers, in agreement with experiments.…”

“…This -conjugated polymer lends itself to application in several areas, including energy storage, rectification and reversible conductance switching, optical biosensing, electrochromism, protection against corrosion, and use in transistors devices, among others (Chandrasoma et al, 2012;Fan et al, 2011;Nemzera & Epsteina, 2010;Zhao et al, 2009;Bernard et al, 2001;Delongchamp & Hammond, 2001; Bartllet et al, 2000;Vivier, 2000;Guo et al, 1999;Kim et al, 1999;Parente et al, 1992). Polyaniline exhibits enhanced values of the () optical second hyperpolarizability according to experimental measurements (Maciel et al, 1998;Halvorson et al, 1993;Cao et al, 1992;Osaheni et al, 1992). In addition, polyaniline and aniline derivatives present relevant magnitudes of the () first hyperpolarizability, as has been experimentally and theoretically assessed (Costa et al, 2007;Machado & da Gama, 2005;Machado et al, 2002;Azevêdo et al, 1998).…”

Cubic Nonlinear Optical Properties of π-Conjugated Polymers from Reflection-Mode Measurements

“…The signals from polyaniline were similar in magnitude to those from the PPVs, thus, not taking into account any other factors influencing the DFWM reflectivities (that is the different linear optical properties of the polymers) one may conclude that the results are consistent with effective jn 2 j for polyaniline being on the order of a few times 10 À12 cm 2 =W. This is in agreement with previous studies of polyanilines [10][11][12][13][14][15][16][17][18][19][20][21] and other results shown below.…”

Synthesis and thermophysical studies of polyanilines

“…Polyaniline is one of the most extensively studied conducting polymers because of its simple synthesis and doping/dedoping chemistry [1,2], comparatively low cost, moderate-to-high conductivity and excellent moisture and air stability. Polyanilines have a broad scope of applications in rechargeable batteries, modern optical information storage, shielding of electromagnetic interference [3][4][5], microwave and radar absorbing materials [6], sensors, indicators, catalysts [7][8][9], electronic and bioelectronic components [10], membranes [11], electrochemical capacitors [12], electrochromic devices, nonlinear optical and light-emitting devices [13][14][15], electromechanical actuators [16], antistatic [17], anti-corrosion coatings [18] etc. Their electromagnetic and optical properties are strongly influenced by their oxidation state and degree of protonation [19][20][21].…”