Vitamins, 14. Vitamin C (<scp>l</scp>‐Ascorbic Acid)

Elste, Volker; Peng, Kun; Kleefeldt, Andreas; Litta, Gilberto; Medlock, Jonathan; Pappenberger, Florian; Oster, Bernd; Fechtel, Ulrich

doi:10.1002/14356007.o27_o10.pub2

Cited by 2 publications

(3 citation statements)

References 117 publications

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“…Moreover, as a result of the combustible nature of hydrazine, extreme care must be taken to prevent accidents. Conversely, the benign l -ascorbic acid used in this work is industrially produced by modification of the classical Reichstein process using d -glucose as the precursor with over 90% yield in each step . Furthermore, most of the l -ascorbic acid produced globally is made by the fermentative oxidation of l -sorbose using Ketogulonicigenium vulgare .…”

Section: Resultsmentioning

confidence: 99%

“…Conversely, the benign l -ascorbic acid used in this work is industrially produced by modification of the classical Reichstein process using d -glucose as the precursor with over 90% yield in each step . Furthermore, most of the l -ascorbic acid produced globally is made by the fermentative oxidation of l -sorbose using Ketogulonicigenium vulgare . The stabilizing and capping agent used in this work, l -alanine, is traditionally produced by the enzymatic conversion of l -aspartic acid, which utilizes immobilized microbial cells .…”

Section: Resultsmentioning

confidence: 99%

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Low-Temperature Sintering of l-Alanine-Functionalized Metallic Copper Particles Affording Conductive Films with Excellent Oxidative Stability

Pereira

Killalea

Amabilino

2022

ACS Appl. Electron. Mater.

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Here, the alpha amino acid l -alanine is employed as both a capping and stabilizing agent in the aqueous synthesis of submicron-sized metallic copper particles under ambient atmospheric conditions. The reduction of the copper(II) precursor is achieved using l -ascorbic acid (vitamin C) as the reducing agent. The nature of the complex formed between l -alanine and the copper(II) precursor, pH of the medium, temperature, and the relative proportion of capping agent are found to play a significant role in determining the size, shape, and oxidative stability of the resulting particles. The adsorbed l -alanine is shown to act as a barrier imparting excellent thermal stability to capped copper particles, delaying the onset of temperature-induced aerial oxidation. The stability of the particles is complemented by highly favorable sintering conditions, rendering the formation of conductive copper films at significantly lower temperatures ( T ≤ 120 °C) compared to alternative preparation methods. The resulting copper films are well-passivated by residual surface l -alanine molecules, promoting long-term stability without hindering the surface chemistry of the copper film as evidenced by the catalytic activity. Contrary to the popular belief that ligands with long carbon chains are best for providing stability, these findings demonstrate that very small ligands can provide highly effective stability to copper without significantly deteriorating its functionality while facilitating low-temperature sintering, which is a key requirement for emerging flexible electronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Low-Temperature Sintering of l-Alanine-Functionalized Metallic Copper Particles Affording Conductive Films with Excellent Oxidative Stability

Pereira

Killalea

Amabilino

2022

ACS Appl. Electron. Mater.

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“…The 2,5‐diketo‐gluconate is then converted to 2‐ketogulonic acid using a strain of Corynebacterium . Finally, 2‐ketogluconic acid is rearranged in an acid medium to become ascorbic acid (Elste et al, 2020). Recently, other processes have been developed and reviewed (Pappenberger & Hohmann, 2014), allowing profitable production of ascorbic acid, if Vitamin C or other value‐added specialty chemicals are synthesized (Lim et al, 2020; Reshmy et al, 2022).…”

Section: Building Blocks and Chemicals Derived From Carbohydratesmentioning

confidence: 99%

Surfactants produced from carbohydrate derivatives: A review of the biobased building blocks used in their synthesis

Ortiz

Alvarado

Zambrano³

et al. 2022

J Surfact & Detergents

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This work reviews the use of carbohydrates and their derivatives as renewable raw materials in the production of surfactants. Methods to attain state‐of‐the‐art carbohydrate‐derived surfactants are described. This includes surfactants widely used nowadays and others that have not yet transcended beyond the academic field. Given the abundance of hydroxyl groups in carbohydrates and the considerable quantity of different surfactant structures that can be generated during their synthesis, selectively obtaining a target product represents a challenge. Therefore, this work focuses on the platform chemicals available to synthesize biobased surfactants. The first part of the review comprises a brief introduction of simple and complex carbohydrates to better understand their chemistry. Then, a description of the processes to obtain biobased building blocks derived from carbohydrates according to the National Renewable Energy Laboratory (NREL, USA), and their usefulness in synthesizing surfactants is presented. This provides an organized inventory of the knowledge around the synthesis–production of surfactants from carbohydrate derivatives, emphasizing raw materials that could be inserted into the circular bioeconomy concept. Finally, the current industry trends and the potential role of biobased surfactants around new dioxane regulations are discussed.

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Vitamins, 14. Vitamin C (l‐Ascorbic Acid)

Cited by 2 publications

References 117 publications

Low-Temperature Sintering of l-Alanine-Functionalized Metallic Copper Particles Affording Conductive Films with Excellent Oxidative Stability

Low-Temperature Sintering of l-Alanine-Functionalized Metallic Copper Particles Affording Conductive Films with Excellent Oxidative Stability

Surfactants produced from carbohydrate derivatives: A review of the biobased building blocks used in their synthesis

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