TY - JOUR
T1 - Conducting tetraaniline derivatives with fast switching time, enhanced contrast and coloration efficiency
AU - Cao, Linyu
AU - Gong, Chen
AU - Yang, Jiping
N1 - Publisher Copyright:
© 2016 Elsevier Ltd.
PY - 2016/2/20
Y1 - 2016/2/20
N2 - Pristine tetraaniline and three carboxyl-substituted tetraaniline derivatives, that is, tetraaniline ((Ani)4), carboxyl-capped tetraaniline ((Ani)4-COOH), amino/carboxyl-capped tetraaniline (NH2-(Ani)4-COOH) and carboxyl-capped star-shaped tetraaniline (Tri-(Ani)4-COOH) were synthesized, and the influence of substituent and molecular architecture on their electrochromic properties was investigated. Pristine (Ani)4 shows lowest electrochromic properties while the carboxyl-capped star-shaped Tri-(Ani)4-COOH possesses the best electrochromic properties with fast bleaching and coloring times of 2.04 s and 1.90 s, respectively, promising optical contrast of 74.2%, and improved coloration efficiency of 133.31 cm2C-1 at 750 nm. This enhanced electrochromic performance can be attributed to the introduction of carboxyl substituent and star-shaped molecular architecture, which are able to improve the interchain charge movement, electron movement between films and substrate and enhanced ion diffusion resulting from loosely packed molecular structure of films, and confirmed by cyclic voltammetry and atomic force microscope results, implying the introduction of special substituent and molecular architecture is an effective strategy to improve the electrochromic properties of aniline oligomers.
AB - Pristine tetraaniline and three carboxyl-substituted tetraaniline derivatives, that is, tetraaniline ((Ani)4), carboxyl-capped tetraaniline ((Ani)4-COOH), amino/carboxyl-capped tetraaniline (NH2-(Ani)4-COOH) and carboxyl-capped star-shaped tetraaniline (Tri-(Ani)4-COOH) were synthesized, and the influence of substituent and molecular architecture on their electrochromic properties was investigated. Pristine (Ani)4 shows lowest electrochromic properties while the carboxyl-capped star-shaped Tri-(Ani)4-COOH possesses the best electrochromic properties with fast bleaching and coloring times of 2.04 s and 1.90 s, respectively, promising optical contrast of 74.2%, and improved coloration efficiency of 133.31 cm2C-1 at 750 nm. This enhanced electrochromic performance can be attributed to the introduction of carboxyl substituent and star-shaped molecular architecture, which are able to improve the interchain charge movement, electron movement between films and substrate and enhanced ion diffusion resulting from loosely packed molecular structure of films, and confirmed by cyclic voltammetry and atomic force microscope results, implying the introduction of special substituent and molecular architecture is an effective strategy to improve the electrochromic properties of aniline oligomers.
KW - electrochromism
KW - star-shaped architecture
KW - substituent
KW - tetraaniline derivative
UR - https://www.scopus.com/pages/publications/84958205903
U2 - 10.1016/j.electacta.2016.02.016
DO - 10.1016/j.electacta.2016.02.016
M3 - 文章
AN - SCOPUS:84958205903
SN - 0013-4686
VL - 192
SP - 422
EP - 430
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -