Two host-guest 2D MOFs based on hexyl viologen cations: Photochromism

Zhao, Guozheng; Liu, Wenya; Yuan, Fang; Liu, Jinjian

doi:10.1016/j.dyepig.2021.109196

Cited by 17 publications

(10 citation statements)

References 59 publications

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“…The color of 1 changes from light yellow to cyan blue upon exposure to UV-light irradiation for less than 1s (Figure a), which demonstrates a faster response than most previously reported complexes (Table S4). ,,,− It is worth noting that cyan blue is stable in air and slowly decolored to dark in more than 3 months. The colored crystals could be decolored to light yellow samples by heating at 100 °C for 1 h under ambient conditions.…”

Section: Results and Discussionmentioning

confidence: 99%

Multistimuli-Responsive Materials Based on Zn(II)-Viologen Coordination Polymers and Their Applications in Inkless Print and Anticounterfeiting

et al. 2022

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Recently, stimuli-responsive materials have attracted great attention, while most of them respond to single or two stimuli. Thus, it is essential to design multifunctional stimuli-responsive materials and develop their applications. The strategy that constructing high-dimensional coordination polymers facilitates the application scope of a viologen-based photochromic system is put forward and confirmed for the first time. Herein, a novel multistimuli-responsive viologen-based Zn-MOF with a two-dimensional framework has been successfully designed and synthesized. Complex 1 exhibits chromic behavior under a variety of external stimuli such as 365 nm UV, X-rays, heat, electricity, and ethylamine. More interestingly, the crystal state of complex 1 displays dual fluorescence and room-temperature phosphorescence (RTP) emission and emits a yellow afterglow when turning off the UV lamp. In addition, Eu(III)-functionalized hybrids, Eu 3+ @Zn-MOF, were prepared by coordinated postsynthetic modification based on viologen complexes for the first time. The sample of Eu 3+ @Zn-MOF inherits the photochromic characteristics of the viologen complexes and gives the distinctive fluorescence of the europium ions. Based on the multicolor switching of 1 and Eu 3+ @Zn-MOF, their possible practical utilization was successfully developed in the fields of inkless, erasable print media, electrochromic information tag printing, information encryption, and anticounterfeiting.

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Section: Results and Discussionmentioning

confidence: 99%

Multistimuli-Responsive Materials Based on Zn(II)-Viologen Coordination Polymers and Their Applications in Inkless Print and Anticounterfeiting

et al. 2022

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“…It is able to effectively convey ET as well as facilitate the formation of viologen radicals. Based on our previous research, [27][28] the π⋅⋅⋅π interaction and hydrogen bonding may be the main reason why complex 1 has a higher discoloration rate than 2.…”

Section: Photochromism Of 1 Andmentioning

confidence: 99%

Crystal Structure and Photochromic Properties of Two Complexes based on 1‐(4‐carboxybenzyl)‐4,4′‐bipyridinium Ligand

et al. 2023

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Selecting different metal ions, two novel complexes {[Zn(BCbpy)(m‐BDC)(H2O)] ⋅ 2H2O}n (1) and [Co(H2O)6]0.5[Co0.5(BCbpy)(H2O)2](m‐BDC) ⋅ 3H2O ⋅ DMF (2) have been prepared and structurally characterized in the presence of the viologen ligand 1‐(4‐carboxybenzyl)‐4,4′‐bipyridinium (BCbpy) and 1,3‐benzenedicarboxylic acid (m‐H2BDC). The crystal structures and photochromic properties of two complexes have been investigated in this article. 1 possesses a two‐dimensional (2D) layered structure, while the structure of 2 is zero‐dimensional (0D). As expected, 1 and 2 were discovered to be photochromic accompanying electron transfer (ET). Interestingly, 1 can be dissolved in ethanol solution and deposited on filter paper, applied to a printing medium without ink.

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“…Although there have been remarkable advances in the use of viologen-based CPs as stimuli-responsive materials, the majority of them only respond to single stimulus. In reality, external stimuli are multiple and diverse, which results in single-stimulus-responsive materials becoming very limited in practical applications. − The synthesis of multi-stimuli-responsive (MSR) viologen-based CPs provides a useful approach to address this problem. − Therefore, all-in-one CP materials, which can combine multiple properties into one, are part of the pursuit of scientists. In synthesizing viologen-based CP materials, besides the common symmetrical moieties modified viologen-based derivatives, asymmetrical units modified ones are also interesting organic linkers, which can be used to build abundant and unpredictable intriguing structures. , …”

Section: Introductionmentioning

confidence: 99%

Multi-Stimuli-Responsive Chromic Behaviors of an All–in–One Viologen-Based Cd(II) Complex

Luo,

Liu,

et al. 2023

Inorg. Chem.

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Two host-guest 2D MOFs based on hexyl viologen cations: Photochromism

Cited by 17 publications

References 59 publications

Multistimuli-Responsive Materials Based on Zn(II)-Viologen Coordination Polymers and Their Applications in Inkless Print and Anticounterfeiting

Multistimuli-Responsive Materials Based on Zn(II)-Viologen Coordination Polymers and Their Applications in Inkless Print and Anticounterfeiting

Crystal Structure and Photochromic Properties of Two Complexes based on 1‐(4‐carboxybenzyl)‐4,4′‐bipyridinium Ligand

Multi-Stimuli-Responsive Chromic Behaviors of an All–in–One Viologen-Based Cd(II) Complex

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