Organic‐Inorganic Hybrid Silica Film with a TGBA Structure

• Published in: Chemistry : a European journal 2024-12, Vol.30 (71), p.e202403140-n/a
• Main Authors: Sun, Wei, Zhao, Jinghua, Wu, Limin, Li, Yi, Liu, Wei, Li, Hongkun, Yang, Yonggang
• Format: Article
• Language: English
• Subjects: Colorful Pattern; Crystal structure; Grain boundaries; Liquid Crystal; Liquid crystals; Organic–Inorganic Hybrid Silica; Polymer films; Polymers; Silica; Silicon dioxide; TGBA phase; Thermochroism
• ISSN: 0947-6539; 1521-3765; 1521-3765
• DOI: 10.1002/chem.202403140

Twisted grain boundary (TGB) phases exhibit highly frustrated and complex liquid crystal structures, and have attracted enormous interest because of their unique internal structure, textures and properties. However, among the few real concerns related to these interesting structures, applying them to prepare polymer‐stabilized colored liquid crystal films has been challenging. Herein, the organic‐inorganic hybrid silica (OIHS) films with a TGBA* structure were prepared using two organosilanes and one chiral additive under an acidic condition. The structural color of the films can be adjusted by varying the polycondensation temperature and the concentration of the chiral additive. A structurally colored pattern was prepared by the inject printing, which was suitably applied for decoration and anti‐counterfeiting. Structurally colored organic‐inorganic hybrid silica (OIHS) films with a TGBA* structure are prepared using a thermochromic liquid crystal mixture. The structural color is sensitive to the polymerization temperature and the chiral additive concentration. A colorful OIHS pattern is prepared by the inject printing, which can be applied for decoration and anti‐counterfeiting.