Journal
CHEMISTRY OF MATERIALS
Volume 32, Issue 18, Pages 7630-7638Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.0c00669
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Funding
- Mid-Career Researcher Program [2016R1A2B2011041]
- BRL Program [2020R1A4A1018259]
- NRF Global Ph.D. Fellowship Program of Republic of Korea
- National Research Foundation of Korea [5199991614006, 22A20130012479] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Bandwidth-tunable anisotropic spatial light modulators are fabricated with redox-responsive dichroic mesogens. By introducing an ionic group and a polymerizable group into the chromophore, the programmed reactive mesogen (PDI-MA) exhibits a lyotropic chromonic liquid crystal (LCLC) phase. The PDI-MA molecule forms a stable aromatic dianion state so that the absorption wavelengths of the dichroic mesogen can be reversibly tuned by redox reactions. Through a continuous process of coating, molecular self-assembly, and polymerization, redox-responsive and uniaxially oriented LCLC polymer films are fabricated. Because of the high dichroic ratio of PDI-MA, the uniaxially oriented LCLC network is capable of anisotropic light modulation in the visible-light spectrum. Uniaxially oriented LCLC films are applied to flexible multichromic smart windows and optical security filters for anticounterfeiting.
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