Citation:
Jia Zheng, Yijun Zheng, Xinhua Wan, ZhiYuan Wang. VISIBLE AND NEAR-INFRARED CHIROPTICAL GELS CONTAINING ELECTROCHROMIC ANTHRAQUINONE IMIDE GROUPS[J]. Chinese Journal of Polymer Science,
;2012, 30(2): 328-336.
doi:
10.1007/s10118-012-1128-0
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A cholesterol-based organogelator bearing an anthraquinone imide (AQI) group was synthesized and characterized. It self-assembled into chiral gels in acetonitrile at low concentrations, which displayed a combination of electrochromic and chiroptical properties. Upon electrochemical reduction at-700 mV, the gel exhibited new absorption bands at around 820 nm corresponding to *-* (SOMOLUMO) transitions of the radical anion of AQI and strong negative Cotton effects in the same spectral region. With further reduction at-1000 mV, a new CD band with a negative Cotton effect in the range from 500 nm to 800 nm appeared concomitant with the variation of absorption spectrum. Thus, with the use of electrochromic AQI chromophore as a switch-responsive unit and the stable gel of compound N-[3-cholest-5-en-3-yl N-(2-aminoethyl) carbamate] anthraquinone-2,3-dicarboxylic imide as a chiral scaffold, a redox-triggered chiroptical switch operating in visible and near-infrared region was realized.
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Keywords:
- Near-infrared
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