Article
Biochemistry & Molecular Biology
Robert Mroczka, Agnieszka Slodkowska, Agata Ladniak, Agnieszka Chrzanowska
Summary: The interactions between functional additives SPS and PEG in the presence of chloride ions were studied using TOF-SIMS and CV. The electrochemical suppressing/accelerating abilities of PEG, thiolate, and chloride surface coverages were estimated and discussed. The conformational influence of the molecules and the hydrophobic interaction of PEG with chloride ions were analyzed, showing a significant synergy between SPS and PEG.
Article
Biochemistry & Molecular Biology
Ahlem Meziadi, Navid Zuberi, Hendrick W. de Haan, Marc A. Gauthier
Summary: This study reveals that the inefficiency of bioconjugation reactions, such as protein PEGylation, is caused by the excluded volume effect (EVE) between methoxy poly(ethylene glycol) (mPEG) and proteins. The researchers found that this EVE leads to the self-assembly of proteins and reactive mPEG into separate protein-rich and mPEG-rich domains. By adding unreactive low-molecular weight mPEG as a co-solvent, the association between the larger protein and reactive mPEG can be promoted, resulting in improved reaction efficiency.
Article
Chemistry, Multidisciplinary
Shuigen Zhou, Yihao Chen, Kailei Li, Xiaowei Liu, Ting Zhang, Wei Shen, Ming Li, Lei Zhou, Rongxing He
Summary: By rational component design, three novel Cu(i)-based metal halides DPCu4X6 [DP = (C6H10N2)(4)(H2PO2)(6); X = Cl, Br, I] were synthesized and exhibited highly efficient yellow-orange photoluminescence with a broad excitation band. DPCu4I6 showed a dual-band emission. Using DPCu4I6 as a single-component phosphor, a high-performance white-light emitting diode (WLED) with a high color rendering index of 85.1 was achieved. This work reveals the role of halogens in the photophysical processes of cuprous halides and provides new design principles for high-performance single-component WLEDs.
Article
Energy & Fuels
Qing-Lin Li, Rui Shan, Shu-Xiao Wang, Tao-li Huhe, Hao-Ran Yuan, Yong Chen
Summary: The design of efficient catalysts is crucial for plastic waste recycling. In this study, high-dispersion nickel-based catalysts were developed using the ethylene glycol assisted impregnation method for the production of carbon nanotubes from pyrolytic catalysis of polyethylene. The addition of ethylene glycol promoted the dispersion of nickel metal, resulting in smaller NiO particle size and enhanced conversion of polyethylene into carbon nanomaterials. This study provides promising directions for the preparation of high-performance catalysts for the production of high-value chemicals from plastic waste.
Article
Polymer Science
Yuxiang Jiang, Chunyu Ji, Jiajia Wu, Qiurui Han, Chen Cui, Wenquan Shi, Zhili Peng
Summary: Despite their wide applications, the synthesis and photoluminescence mechanism of carbon dots (C-dots) have received less attention, limiting their further developments. In this study, C-dots were prepared from polyethylene glycol (PEG) with different molecular weights (M.W.), and the effects of PEG M.W. on the formation, structure, and optical properties of C-dots were carefully investigated. It was found that the particle sizes, fluorescence intensities, surface chemistry, thermal stability, and bioimaging capabilities of C-dots were significantly influenced by the PEG M.W. Moreover, these C-dots showed low cytotoxicity and promising potential for cellular bioimaging.
Article
Chemistry, Inorganic & Nuclear
Jagodish C. Sarker, Rosie Nash, Suwimon Boonrungsiman, David Pugh, Graeme Hogarth
Summary: The synthesis and characterization of stable diaryl dithiocarbamate salts and their conversion to thiuram disulfides have been investigated. The coordinating ability of diaryl dithiocarbamates has been demonstrated through the preparation of metal complexes. In addition, a competitive intramolecular free-radical cyclization reaction has been observed for certain dithiocarbamate salts.
DALTON TRANSACTIONS
(2022)
Article
Crystallography
Bing Lei, Xin Wu, Wei Liu
Summary: An organic-inorganic hybrid structure based on copper (I) iodide staircase chain has been synthesized using a slow-diffusion method, showing red emission at 620 nm with an internal quantum yield of 6.5% under 360 nm excitation. This compound exhibits potential as a non-rare-earth light-emitting phosphor alternative.
Article
Chemistry, Multidisciplinary
Imran Ozer, Garrett Kelly, Renpeng Gu, Xinghai Li, Nikita Zakharov, Parul Sirohi, Smita K. Nair, Joel H. Collier, Michael S. Hershfield, Angus M. Hucknall, Ashutosh Chilkoti
Summary: Protein therapeutics, especially those with PEG decoration, face challenges of short half-life and immunogenicity. The authors developed a poly(oligo(ethylene glycol) methyl ether methacrylate) (POEGMA) conjugate to improve the stability and immunogenicity of PEGylated proteins. The uricase-POEGMA conjugate demonstrated enhanced pharmacokinetics and reduced immunogenicity compared to traditional PEGylated proteins.
Article
Chemistry, Physical
Xubing Sun, Jiayong Zhang, Yaohui You
Summary: Xanthated black wattle tannin gel (XBTG) was prepared by modifying black wattle tannin gel (BTG) with carbon disulfide to enhance Cu(II) removal efficiency. The introduction of xanthate groups onto BTG improved Cu(II) adsorption rate and capacity. XBTG could be regenerated using ethylenediaminetetraacetic acid disodium salt solution, and the regenerated adsorption capacity remained equivalent to that of BTG.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Dominika Trager, Dagmara Slota, Karina Niziolek, Wioletta Florkiewicz, Agnieszka Sobczak-Kupiec
Summary: Bone tissue degeneration is a significant problem affecting various social groups. This study presents a novel ceramic-polymer coating modified with carbon nanotubes for bone regeneration. The results demonstrate that the coatings are bioactive and do not negatively affect their properties.
Article
Chemistry, Physical
Samuel Jeong, Tatsuhiko Ohto, Tomohiko Nishiuchi, Yuki Nagata, Jun-ichi Fujita, Yoshikazu Ito
Summary: The study presents a method of accelerating the electrochemical reduction of CO2 and increasing the formation rate using a polymer-covered Sn catalyst. Nickel phosphide demonstrates high Faradaic efficiency at -1.2 V (vs RHE).
Article
Chemistry, Inorganic & Nuclear
Thomas Rotaermel, Pascal Specht, Jonathan Becker, Adam Neuba, Siegfried Schindler
Summary: In the active site of copper monooxygenases, thioether residues coordinate through the sulfur atom. The reaction between dioxygen and copper(I) complexes with thioether groups was investigated, and the formation of labile intermediates and copper(II) complexes was detected. The finding of increased stability in the formed superoxido copper complex by replacing the ethyl group with a methyl group in a specific derivative was particularly interesting. Ozone measurements were conducted to explore alternative ways to obtain and stabilize labile intermediates.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Leo Boivin, Adrien Schlachter, Daniel Fortin, Christophe Lescop, Pierre D. Harvey
Summary: This study conducted a systematic statistical analysis to investigate the effects of different ligands and salt concentrations on CuI aggregates, and determined new structures through experiments and structural analysis. The study also discovered a 0D complex with thermally activated delayed fluorescence.
Article
Chemistry, Multidisciplinary
Flavia Zisi Tegou, Diana Velluto, Aaron A. Stock, Samantha N. Fitzgerald, Samuel Stealey, Silviya P. Zustiak, Allison L. Bayer, Alice A. Tomei
Summary: This study developed a polyethylene glycol hydrogel platform for sustained release of beta cell antigens and CCL21 immunomodulatory molecule, enabling the development of antigen-specific tolerance therapies for Type-I Diabetes.
JOURNAL OF CONTROLLED RELEASE
(2022)
Article
Engineering, Multidisciplinary
Baowei Qiu, Qian Zou, Tong Sun, Youquan Ling, Shengtai Zhou, Yang Chen, Shuang Xia, Zhengguang Heng, Huawei Zou, Mei Liang
Summary: High modulus carbon fibers are widely used in aerospace and robotics, but their high degree of graphite microcrystalline structure leads to poor interfacial properties with host matrices in carbon fiber reinforced polymer composites (CFRPs). To address this issue, a method involving synthetic water-based epoxy emulsion nanospheres was proposed to improve the interfacial properties of CFRPs. The modified CFRPs showed enhanced interfacial properties by 25% compared to untreated counterparts, while also retaining monofilament tensile strength and protecting CFs during industrial processing. This approach opens up possibilities for developing materials with superior interfacial performance for various inert high modulus fibers.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Organic
Habib Firouzabadi, Nasser Iranpoor, Forough Gorginpour, Arash Samadi
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2015)
Article
Chemistry, Physical
Habib Firouzabadi, Nasser Iranpoor, Mohammad Gholinejad, Arash Samadi
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
(2013)
Article
Plant Sciences
Noviany Noviany, Arash Samadi, Nita Yuliyan, Sutopo Hadi, Muhammad Aziz, Neny Purwitasari, Suriyati Mohamad, Nur Najihah Ismail, Kevin P. Gable, Taifo Mahmud
PHYTOCHEMISTRY LETTERS
(2020)
Article
Chemistry, Medicinal
Noviany Noviany, Arash Samadi, Evan L. Carpenter, Mostafa E. Abugrain, Sutopo Hadi, Neny Purwitasari, Gitali Indra, Arup Indra, Taifo Mahmud
Summary: The chemical structures of two compounds isolated from Sesbania grandiflora have been revised, and seven new derivatives have been synthesized. Compound 6 showed moderate antibacterial activity, while compounds 8 and 12 exhibited cytotoxicity against melanoma cancer cells.
JOURNAL OF NATURAL MEDICINES
(2021)
Article
Multidisciplinary Sciences
Takeshi Tsunoda, Arash Samadi, Sachin Burade, Taifo Mahmud
Summary: This article reports the complete biosynthetic pathway of acarbose, a drug used for treating type-2 diabetes, and identifies a pseudoglycosyltransferase enzyme. The market demand for acarbose has increased as the number of type-2 diabetes patients worldwide rises.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Auday A. A. Eida, Arash Samadi, Takeshi Tsunoda, Taifo Mahmud
Summary: This study reports the synthesis process of the potent antitumor antibiotic pactamycin, and reveals the synthetic pathway by post-glycosylation modifications of its sugar moiety.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Organic
Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh
Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.
TETRAHEDRON LETTERS
(2024)
