Details

Autor(en) / Beteiligte

• Kang, Dong-Gue
• Rim, Minwoo
• Ko, Hyeyoon
• Koo, Jahyeon
• Lim, Seok-In
• Park, Minwook
• Yoon, Won-Jin
• Choi, Yu-Jin
• Jeong, Kwang-Un

Titel

Uniaxially Oriented and Polymerized Chromonic Nanocolumns for Redox-Responsive Smart Glass

Ist Teil von

• Chemistry of materials, 2020-09, Vol.32 (18), p.7630-7638

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.