High-Contrast Colorless-to-Colored Thermochromic Materials.

ABSTRACT: Herein, high-contrast colorless-to-colored thermochromic materials are accomplished through novel 3-component mixtures based on catechol/pyrogallol derivatives (color developer - CD), fatty acid phase change materials (PCM), and leuco dyes. Such components ensure: I) always highly colored hot liquid states, promoted by strong stabilization of the dye open form through hydrogen-bonding interactions with the CDs' vicinal -hydroxyl groups, as also demonstrated by density functional theory calculations; II) solid mixtures with fully controllable coloration state, which directly relies on the relative length of the alkyl chain of CD (C_CD) and PCM (C_PCM). As also rationalized by thermal and spectoscopic measurements, colorless solids are obtained when C_CD is larg

SUBMITTER: Dinda D 

PROVIDER: S-EPMC12723342 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature