Dual Intermediates in C–C Coupling Reactions and High-Performance Sodium–Iodine Batteries: In Situ Generated Quasi-Graphene in Anthraquinone-Inserted Layered Double Hydroxide

Article

Author: Li, Kai ; Gong, Yun ; Li, Ruijie

Na-I₂ batteries are a cost-effective alternative to conventional energy storage technologies. However, their development is hindered by highly soluble polyiodides and sluggish redox kinetics. Herein, the issues are solved by a 1,8-dianthraquinone (AQ)-inserted layered double hydroxide (CoNi LDH-AQ) formulated as Co_1.65Ni_4.35(CO₃)_1.5(OH)₃(AQ)₃, whose interlayer channel not only immobilizes polyiodides but also acts as a confined vessel for the C-C couplings of AQ into functionalized quasi-graphene (F-GO). The in situ generated I⁺ not only promotes the I^-/I₂/I⁺ multielectron conversion to boost redox kinetics, eliminate shuttle effect, and achieve superior capacities/lifespans but also accelerates the couplings of AQ with low barriers. The work proposes a two-in-one strategy, which combines inorganic and organic reactions together with the same intermediate. It provides a routine to synthesize quasi-graphene based on the couplings of small organic species in a confined space to suppress aggregation. And the good conductivity of quasi-graphene in turn facilitates electron transfer in Na-I₂ batteries.

04 Mar 2025·Journal of Macromolecular Science, Part A

Synthesis and characterization of benzotriazole-functionalized 1,3,5-triazine-based luminescent high-performance polymers and their antibacterial efficacy

Author: Rajput, Radha R. ; Patel, Saurabh K.

A straightforward approach in fabricating novel thermally stable fluorescent polymeric materials by incorporating 1,3,5-triazine as a core moiety, coumarin as a fluorophore and 1,2,3-benzotriazole as a synthetic auxiliary resulting in the synthesis of 2-(1,2,3-benztriazolo)-4,6-bis-(7-hydroxy-coumarin-4-acetyl chloride)-s-triazine as the key monomer.A range of aromatic and aliphatic diols were introduced by using cetrimide as the initiator under polar aprotic solvent to synthesize desired polyesters.Incorporation of bulky pendent group in structure increases the thermal stability and solubility of the polyesters.The intrinsic, reduced and inherent viscosities were determined by using Huggins and Kraemer′s method.A detailed kinetic study based on the thermogravimetric anal. has been carried out and activation energy was calculated by using Broido, Horowitz and Metzger methods.Moreover, FTIR, ¹H NMR, photoluminescent behavior and antibacterial efficacy have also been evaluated.This study contributes to the development of multifunctional polymeric materials with fluorescence, thermal stability and antibacterial capabilities, such as bioimaging, drug delivery and antimicrobial coatings for medical devices.The selection of these components is guided by their distinctive features and synergistic potential in the production of high-performance polymers.

01 Mar 2025·Journal of Food Science

Toxicological evaluation of Chlamydomonas reinhardtii enriched with protoporphyrin IX

Article

Author: Xie, Zemi ; Wu, Yuejin ; Wang, Qinxi ; Qu, Xuefeng ; Zhang, Yangjunna ; Wang, Yin ; Liu, Zhen

AbstractThe Chlamydomonas reinhardtii (red) is a strain rich in protoporphyrin IX, which could be used as algal‐derived novel sustainable nutritional sources. However, the safety research on C. reinhardtii (red) remains insufficient and further investigation is needed. In order to assess the safety of C. reinhardtii (red) and to expand its use in food applications, a series of toxicological safety evaluations were carried out to observe acute toxicity, subchronic toxicity and genotoxicity of C. reinhardtii (red). The C. reinhardtii (red) was administered to an acute oral toxicity test, mammalian micronucleus test, mouse chromosomal aberration test in Institute of Cancer Research (ICR) mice, and 90‐day repeated‐dose oral toxicity test in Sprague‐Dawley (SD) rats. In the acute oral toxicological test, no mortality or abnormalities were observed in male and female rats, with an median lethal dose(Lethal Dose, 50%) (LD50) exceeding 10.0 g/kg body weight (BW). Similarly, male and female mice exhibited no mortality or abnormalities, with an LD50 surpassing 20.0 g/kg BW. The results of bacterial reverse mutation test, mammalian micronucleus test, and mouse chromosomal aberration test were all negative, suggesting that the C. reinhardtii (red) did not show mutagenicity under the conditions of this experiment. In a 90‐day repeated‐dose oral toxicity study, the SD rats were orally administered daily doses of 2.0 g/kg BW, 4.0 g/kg BW, and 8.0 g/kg BW without exhibiting any signs or symptoms of toxicity. Therefore, the no observed adverse effect level (NOAEL) of C. reinhardtii (red) was 8.0 g/kg BW/day. This study contributes to information necessary to form a basis for safety for expanding the application range of C. reinhardtii (red) in food.Practical ApplicationThe aim of this study was to assess the safety of C. reinhardtii (red) and to expand its use in food applications. The major finding of this study is that the C. reinhardtii (red) did not show acute toxicity, subchronic toxicity and genotoxicity under the conditions of this experiment. This study contributes to information necessary to form a basis for safety for expanding the application range of C. reinhardtii (red) in food.

100 Deals associated with Dantron

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KEGG	Wiki	ATC	Drug Bank
D07107	Dantron	A06AB03	DB04816

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Constipation	United Kingdom	-	08 Nov 1999

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