Remote activation of nanoparticulate biomimetic activity by light triggered pH-jump

Wang, Xiaopei; Gong, Ao; Luo, Wenhao; Wang, Haiqing; Lin, Changxu; Liu, Xiang Yang; Lin, Youhui

doi:10.1039/c8cc04279a

Cited by 17 publications

(12 citation statements)

References 39 publications

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“…This is a good general strategy for control of enzymes with a significant pH profile, shown in an example of acid phosphatase whose relative activity was increased from 3 to 78% by a light-induced pH shift from pH 8 to 6 . The same system has been applied for remote activation of oxidase-like activity of nanozymes . A dual photoresponsive system was designed for precise control of chemical reactions by optically controlling pH and temperature.…”

Section: Photoswitchable Proteins With Catalytic Activitymentioning

confidence: 99%

“…212 The same system has been applied for remote activation of oxidaselike activity of nanozymes. 213 A dual photoresponsive system was designed for precise control of chemical reactions by optically controlling pH and temperature. Graphene oxide, which absorbs near-infrared and coverts it to thermal energy, was chosen as a thermoregulator, and malachite green carbinol base, which releases OH − under UV light, was chosen as a pH regulator.…”

Section: Acs Catalysismentioning

confidence: 99%

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Photo-Biocatalysis: Biotransformations in the Presence of Light

et al. 2019

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Light has received increased attention for various chemical reactions but also in combination with biocatalytic reactions. Because currently only a few enzymatic reactions are known, which per se require light, most transformations involving light and a biocatalyst exploit light either for providing the cosubstrate or cofactor in an appropriate redox state for the biotransformation. In selected cases, a promiscuous activity of known enzymes in the presence of light could be induced. In other approaches, light-induced chemical reactions have been combined with a biocatalytic step, or light-induced biocatalytic reactions were combined with chemical reactions in a linear cascade. Finally, enzymes with a light switchable moiety have been investigated to turn off/on or tune the actual reaction. This Review gives an overview of the various approaches for using light in biocatalysis.

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Section: Photoswitchable Proteins With Catalytic Activitymentioning

confidence: 99%

Section: Acs Catalysismentioning

confidence: 99%

Photo-Biocatalysis: Biotransformations in the Presence of Light

et al. 2019

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“…As the important subfield of catalysis, nanozymes defined as nanostructures with enzyme-like characteristics are constantly emerging. , Nanozymes have outstanding advantages, including low cost, ease of preparation and modification, high durability and stability, as well as uniformity, which have been applied for sensing, cytoprotection, cancer diagnosis and treatment, and environmental remediation. − Although the nanozyme activity is well modulated by pH, light irradiation, and electrochemical oxidation and reduction, − the nanozyme substrates are consumed to yield various reaction products. The corresponding reaction systems are not reversible because the nanozyme substrates cannot be regenerated any more after reaction.…”

Section: Introductionmentioning

confidence: 99%

Blue Light-Gated Reversible Silver Nanozyme Reaction Networks that Achieve Life-like Adaptivity

Jiang

Deng

et al. 2020

ACS Sustainable Chem. Eng.

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Life is preserved by complex enzymatic reaction systems. Inspired by life, here we report on the first example to fabricate blue light-gated reversible silver nanozyme reaction networks that achieve life-like adaptivity. Upon blue light excitation, silver nanoparticles (AgNPs) display oxidase-like activity in the presence of Cl − as a cofactor. The addition of Cl − promotes the separation between hot holes and electrons that are generated by excited-state surface plasmon of AgNPs, inducing the generation of highly reactive hydroxyl and superoxide anion radicals. They oxidize colorless 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)diammonium salt (ABTS) to yield green ABTS radicals (ABTS •+ ). It is shown that ABTS •+ is able to be reduced by AgNPs to regenerate ABTS when the blue light is turned off, and the reaction system returns to its initial state, which is the typical feature of the artificial adaptive system. The dynamic process of the adaptive system is tunable by changing the concentrations of AgNPs and Cl − , and it possesses excellent recyclable performance, which can be repeated at least six times. Overall, the silver nanozyme reaction networks are capable of responding to blue light stimuli and renewing by recycling to the initial state without blue light irradiation.

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“…Since the discovery that Fe 3 O 4 nanoparticles have peroxidaselike activity, 1 numerous nano-scale materials like metal nanomaterials, 2,3 metal-oxide nanoparticles, [4][5][6][7] carbon nanoparticles, [8][9][10][11] and metal-organic frameworks 12,13 have been found to have enzyme-like activities. Nanomaterials with enzyme activity are known as nanozymes.…”

mentioning

confidence: 99%