Smart materials for light absorptive rewritable paper: Chromic mechanisms and structural design

Xi, Guan; Sheng, Lan; Zhang, Sean Xiao-An

doi:10.1016/j.mser.2024.100774

Materials Science and Engineering: R: Reports

2024

DOI: 10.1016/j.mser.2024.100774

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Smart materials for light absorptive rewritable paper: Chromic mechanisms and structural design

Guan Xi,

Lan Sheng,

Sean Xiao-An Zhang

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Cited by 13 publications

References 151 publications

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Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

Sacherer,

Dube

2024

Advanced Materials

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Molecular photoswitches produce light‐controlled changes at the nanometer scale and can therefore be used to alter the states and behavior of materials in a truly bottom‐up fashion. Here an escalating photonic complexity of material property control with light is shown using a recently developed aza‐diarylethene in combination with hemiindigo (HI) photoswitches. First, aza‐diarylethene can be used as a photoswitch in polystyrene (PS) to reversibly inscribe relief‐type 3D structures into PS. Second, aza‐diarylethene can further be used as a photoinitiator for light‐induced polymerization of methyl acrylate (MA), demonstrating for the first time light‐controlled chemical reactivity control with its zwitterionic switching state. Third, aza‐diarylethene and HIs are implemented into aza‐diarylethene polymerized MA, generating photochromic polymers. At the fourth level, a binary mixture allows to synergize aza‐diarylethene‐induced photopolymerization with localized photochromism changes of the simultaneously entrapped functional HI. With such multilevel light response, the utility of this particular photoswitch combination for applications in advanced photonic materials is demonstrated.

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Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

Sacherer,

Dube

2024

Advanced Materials

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The Influence of Halogen Anions on the Color/Fluorescence Dual‐Switching Behaviors of 1,10‐Phenanthroline‐Based Viologen Derivatives

Zhuang,

Zhang,

Lin

2024

ChemNanoMat

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Stimuli‐responsive color/fluorescence dual‐switchable materials have garnered significant attention in displays, sensors, and anti‐counterfeiting. However, current material systems are hampered by the single stimulus‐response and unregulated fluorescence. Viologen derivatives featuring fluorophore as N‐substituent and halogen anions as counteranions not only exhibit responsiveness to both electric and light stimuli but also enable adjustable emission. In this work, we explored the influence of halogen anions on the color/fluorescence dual‐switching behaviors of 1,10‐phenanthroline‐based viologen derivatives. The energy level gaps for phen‐Vio[2Cl−] (2.93 eV), phen‐Vio[2Br−] (2.67 eV), and phen‐Vio[2I−] (2.34 eV) decreased with the decrease of electron affinity of halogen anions (Cl−>Br−>I−), which leads to a sequential improvement in their electrochromic/electrofluorochromic and photochromic/photofluorochromic properties. This work has important guidance for the design and development of smart materials and their optoelectronic devices.

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Multi‐Colored Aqueous Ink for Rewritable Paper

Das,

Maity

2024

Small

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As sustainable and eco‐friendly replacements to conventional paper, rewritable paper is a very attractive alternative for communication, information circulation, and storage. Development is made for rewritable paper using chromogenic materials that change its color in presence of external stimuli. However, the new techniques have faced several major challenges including feasible operational method, eco‐friendly approach. Herein, a simple, convenient, and eco‐friendly strategy is described for the preparation of rewritable paper substrate, and multi colored ink for efficient use in writing, painting or printing purpose. In addition, writing with “invisible ink” on the rewritable paper can be realized for potential anti‐counterfeiting application. The written, painted, or printed information on the paper substrate can be easily erased using an aqueous solution. Thus, the original paper can be retrieved and the paper substrate can be reused multiple times. Besides, the written or printed information can be retained for a prolonged time at ambient conditions. Overall, this approach shows the rewritable paper as a prototype of multicolor writing/painting application, offering a sustainable solution for reducing paper waste and promoting environmental stewardship.

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Smart materials for light absorptive rewritable paper: Chromic mechanisms and structural design

Cited by 13 publications

References 151 publications

Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

Combined Photopolymerization and Localized Photochromism by Aza‐Diarylethene and Hemiindigo Synergy

The Influence of Halogen Anions on the Color/Fluorescence Dual‐Switching Behaviors of 1,10‐Phenanthroline‐Based Viologen Derivatives

Multi‐Colored Aqueous Ink for Rewritable Paper

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