Metal-free functionalized stilbene crystals exhibit silver luster

Stimuli-Responsive Biomimetic Metallic Luster Films Using Dye Absorption and Specular Reflection from Layered Microcrystals

“…A comparison of the XRD patterns of the crystalline film and the powder showed that certain diffraction peak intensities were higher in the film than in the powder, indicating that the crystal planes were highly oriented in the same direction within the film (Figure S13). 13,62 These data showed that the glossy texture was caused by specular reflection on a smooth surface formed by the orientation of the plate-like crystals in which the lamellar structure was grown (Figure 8a). In contrast, SEM images of the DAzo-DA1 and DAzo-DA2 powders showed small crystals oriented in random directions (Figure 7c,d).…”

Slippage- and load-induced changes in the crystalline orientation of oligo(3-methoxythiophene) powder to develop a gold-tone luster

“…1,2 Among these organic materials, the method by which the metallic luster is developed differs depending on the chemical properties of the material. Such methods include crystallization, [3][4][5][6][7][8] solidication by ltration, [9][10][11][12] electrochemical polymerization, [13][14][15][16] and solution application. [17][18][19][20][21][22][23] However, the design of a novel and more facile method for the development of metallic lusters could promote the application of the corresponding organic materials in the eld of decoration, while also expanding their range of uses.…”

Color Control of Metal-like Lustrous Films of 3-Alkoxythiophene Oligomer Dyes by Changing Subnanometer-Scale Interlamellar Distance

“…The different lengths of the alkoxy groups and the different DP p of the oligomers have almost no effect on the electronic state of each oligomer. In previously reported organic-based metallic luster materials, different luster colors resulted from changes in electronic states associated with major changes in the original molecular structure or external stimuli. − ,,,,− This is similar to the way the color of a substance can be modified. In contrast, our alkoxythiophene system has a consistent structure and electronic state and does not require external stimuli to generate distinct gloss colors.…”

“…Several molecules exhibit metallic luster solely with organic compounds. − For instance, polyacetylene, a semiconducting organic polymer, displays a silver luster, while air-stable fluorinated polyacetylene exhibits a gold luster in bulk solids . Kondo et al reported that low-molecular-weight azobenzene and stilbene derivatives exhibit gold- and silver-like luster, respectively, when crystallized and fabricated into films. ,, In addition, they reported luster color changes caused by external stimuli . Compounds that can exhibit metallic luster colors from organic materials alone are advantageous.…”

“…26 Kondo et al reported that low-molecular-weight azobenzene and stilbene derivatives exhibit gold-and silver-like luster, respectively, when crystallized and fabricated into films. 18,20,25 In addition, they reported luster color changes caused by external stimuli. 27 Compounds that can exhibit metallic luster colors from organic materials alone are advantageous.…”