Photofunctional Materials Based on Sheet Polymer Capped Organic Molecules for Visible‐Light‐Responsive Rewritable Paper

Hasanin, Mohamed S.; Sharmoukh, Walid; Hassan, Youssef R.; Saied, Houssni El

doi:10.1007/s10904-021-02149-0

Cited by 1 publication

(1 citation statement)

References 32 publications

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“…Khazi et al, in their review paper, summarized various chromogenic rewritable materials, including hydrochromic, photochromic, mechanochromic, thermochromic, and redox materials . In addition to their discussions, numerous studies on rewritable papers have recently been conducted. − Recently, Luo et al successfully functionalized commercially available printed paper by performing a two-step infiltration using graphene laminates and SiO 2 colloidal spheres. Depending on the size of the colloidal spheres, a different wavelength of colored modified papers was obtained.…”

Section: Introductionmentioning

confidence: 99%

Flexible Multicolor Rewritable Paper Coated with Metallosupramolecular Polymers for Electrochromic Printing and Natural Erasing by Humidity

Zhang,

Jena,

Higuchi

2023

ACS Appl. Polym. Mater.

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Stamping an image on paper with ink is a conventional approach to displaying information. As a next-generation display, stimuli-responsive rewritable paper has attracted considerable attention. In this study, we present an electrical color printing approach using electrochromic (EC) Fe(II) and Ru(II)-based metallosupramolecular polymers (MSPs), which were synthesized via complexation of the metal ions and a chelating terpyridine ligand. The printing method involves a flexible ITO film with a Fe(II)-based MSP layer (an EC film), an erasing unit, and a printing unit. To conduct the writing or erasing process, the erasing unit or the printing unit was stuck on the EC film and an oxidative or reductive potential was applied to the EC layer of the EC film. The printing and erasing of an image were caused by the oxidation state changes between Fe(II) and Fe(III) in the EC layer. After printing, the printed information remained for more than a week due to the memory property of the Fe(III)-based MSP film. The printed information was quickly erased through electrochemical reduction. The rewritable EC film had a subsecond switching time (<1 s) and high stability for repeated writing/erasing more than 2500 times. In addition, it was also found that printed information could be naturally erased under humid conditions. An EC film containing both Fe(II)-and Ru(II)-based MSPs successfully displayed multiple colors by varying the potential application time.

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