TY - JOUR
T1 - A precursor strategy for the synthesis of low band-gap polymers
T2 - An efficient route to a series of near-infrared electrochromic polymers
AU - Qian, Gang
AU - Abu, Hana
AU - Wang, Zhi Yuan
PY - 2011/6/7
Y1 - 2011/6/7
N2 - A precursor strategy for the synthesis and screening of a series of conjugated donor-acceptor polymers is demonstrated by successful preparation of low band-gap polymers (P2-P5) containing triphenylamine as an electron donor and several heterocycles as acceptors, such as [1,2,5]thiadiazolo[3,4-g] quinoxaline, [1,2,5]thiadiazolo[3,4-i]dibenzo[a,c]phenazine, benzo[1,2-c:4,5-c′]bis([1,2,5]thiadiazole), and selenadiazole[3,4-f] benzo[c][1,2,5]thiadiazole, that are transformed from a single reactive polymer (P1). Polymers P2-P5 have the band gap of 1.71-1.29 eV and show the absorption and emission in the near infrared (NIR) spectral region. All the polymers are also NIR electrochromic. In particular, polymer P3 is electrochemically switchable between leaf-like green coloring and near-infrared absorbing states with an efficiency of 479 cm2 C-1 at 1310 nm or 232 cm2 C-1 at 1550 nm, making it potentially useful for electrically switchable day-to-night camouflage applications.
AB - A precursor strategy for the synthesis and screening of a series of conjugated donor-acceptor polymers is demonstrated by successful preparation of low band-gap polymers (P2-P5) containing triphenylamine as an electron donor and several heterocycles as acceptors, such as [1,2,5]thiadiazolo[3,4-g] quinoxaline, [1,2,5]thiadiazolo[3,4-i]dibenzo[a,c]phenazine, benzo[1,2-c:4,5-c′]bis([1,2,5]thiadiazole), and selenadiazole[3,4-f] benzo[c][1,2,5]thiadiazole, that are transformed from a single reactive polymer (P1). Polymers P2-P5 have the band gap of 1.71-1.29 eV and show the absorption and emission in the near infrared (NIR) spectral region. All the polymers are also NIR electrochromic. In particular, polymer P3 is electrochemically switchable between leaf-like green coloring and near-infrared absorbing states with an efficiency of 479 cm2 C-1 at 1310 nm or 232 cm2 C-1 at 1550 nm, making it potentially useful for electrically switchable day-to-night camouflage applications.
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U2 - 10.1039/c1jm10629e
DO - 10.1039/c1jm10629e
M3 - Article
AN - SCOPUS:79956271747
SN - 0959-9428
VL - 21
SP - 7678
EP - 7685
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
IS - 21
ER -