Article
Engineering, Environmental
Jia Gu, Yang Song, Yi Yang, Chaoting Guan, Jin Jiang
Summary: The mechanism of the activation of peroxides by quinones has been investigated through quantum chemical calculations. Different quinone compounds activate peroxides in different ways.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Mo Sha, Huaping Zhao, Yong Lei
Summary: The 3D architecture electrodes offer significant opportunities to enhance the energy density, power density, and lifespan of microbatteries and microsupercapacitors. Although applying 3D architecture electrodes to MBs and MSCs can effectively improve their performance, it also brings some challenges.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Wenhao Yuan, Long Zhao, Jiuzhong Yang, Zhongyue Zhou, Yuyang Li, Fei Qi
Summary: This study investigated the experimental and kinetic modeling of the combustion of p-xylene in laminar premixed flames under different conditions, revealing key reactions and major products formed. The formation pathways of important intermediates and polycyclic aromatic hydrocarbons (PAHs) were studied, providing insights into the combustion mechanisms of p-xylene.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Inorganic & Nuclear
Katie Hobson, Claire J. Carmalt, Clare Bakewell
Summary: The mechanism of aluminum-mediated hydroboration of terminal alkynes was investigated using novel aluminum complexes with symmetric and asymmetric ligands. Kinetic analysis and stoichiometric reactions revealed that the mechanism likely proceeds via the initial formation of an Al-borane adduct. Additionally, the most unstable aluminum complex was found to promote the decomposition of the substrate, leading to catalysis of the reaction.
INORGANIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Degong Kong, Muliang Zhang, Yuchao Zhang, Zhenyang Yu, Hui Cao, Jie Wu
Summary: The synthesis of geminal and vicinal borosilanes from selective hydrosilylation of alkenyl boronates via photoinduced hydrogen atom transfer (HAT) catalysis is reported. Mechanistic studies reveal that the alpha-selectivity arises from a kinetically favored radical addition and an energetically favored HAT process. The selective synthesis of vicinal borosilanes is demonstrated through 1,2-boron radical migration. These strategies exhibit broad scopes and synthetic utility in accessing various boron compounds and multi-borosilanes.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Environmental
Yali Guo, Minghao Sui, Shuan Liu, Tian Li, Xinyuan Lv, Miao Yu, Yaojun Mo
Summary: In this study, a hollow sphere-like Co-modified LaFeO3 perovskite catalyst was developed for peracetic acid activation to degrade sulfamethoxazole. The results showed that the catalyst achieved a high degradation performance, attributed to the synergistic effect of electron transfer and oxygen defects. Cobalt substitution as the main active site and the generation of oxygen vacancies facilitated the activation of peracetic acid and the production of reactive oxygen species. The degradation pathways and the susceptible sites for oxidation were proposed based on theoretical calculations and intermediates identification.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Chemistry, Multidisciplinary
Bai Li, Manoj Kumar, Chuan Zhou, Lei Li, Joseph S. Francisco
Summary: This study simulated the reaction between Criegee intermediates and hydroperoxyl radicals and found that the reaction is temperature-dependent. The results suggest that HO2 radicals may play a role in the formation of new particles in the troposphere, and water molecules may also be important in the reactions of Criegee intermediates.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Quynh H. Nguyen, Ho Seong Hwang, Eun Jin Cho, Seunghoon Shin
Summary: Irradiation of N-enoxybenzotriazoles with blue LEDs in the presence of photosensitizers generates benzotriazolyl and alpha-carbonyl radicals, leading to the synthesis of biologically significant benzotriazolyl derivatives through atom-economic [1,3]-shift and group transfer radical addition reactions.
Review
Polymer Science
Maria Rapa, Raluca Nicoleta Darie-Nita, Ecaterina Matei, Andra-Mihaela Predescu, Andrei-Constantin Berbecaru, Cristian Predescu
Summary: Anthropogenic microplastics and nanoplastics are widespread pollutants found in various environments. This review focuses on the release of these plastic pollutants in drinking water sources, such as tap water and bottled water, and examines their potential effects on human health. The study also evaluates emerging technologies for removing microplastics and nanoplastics from drinking water sources. The findings show that microplastics larger than 10μm can be completely removed from drinking water treatment plants, and the smallest identified nanoplastic had a diameter of 58 nm. The study highlights the importance of a unified approach to detect and regulate these pollutants in drinking water for human consumption.
Article
Chemistry, Physical
Qixin Chen, Xixi Hu, Hua Guo, Daiqian Xie
Summary: A trajectory study of the reaction dynamics on a full-dimensional potential energy surface (PES) reveals that the energy of the highly exoergic reaction H + O-3 -> OH + O-2 is primarily channeled into the vibration of the OH product, deviating significantly from the statistical limit. The calculated highly inverted OH vibrational distribution, peaking near the highest accessible vibrational state, is in excellent agreement with experimental observations, validating the accuracy of the PES. Additionally, the nonthermal excitation of the OH vibrational mode is traced back to a small potential barrier in the entrance channel, controlling the energy flow into various degrees of freedom in the products.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Biochemistry & Molecular Biology
Myo Htet, Jane. E. Nally, Patricia. E. Martin, Yvonne Dempsie
Summary: This review discusses the association between dysregulated connexin-mediated signaling and pulmonary hypertension and provides evidence supporting this association.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Chemical
Peng Zhou, Shuang Meng, Minglu Sun, Kunsheng Hu, Yangyang Yang, Bo Lai, Shaobin Wang, Xiaoguang Duan
Summary: A metal-free co-catalyst, amorphous boron (A-Boron), was used to overcome the slow kinetics of Fe-II regeneration and inactive Fe-III accumulation in Fenton-like peroxydisulfate (PDS) activation. The A-Boron/Fe-III/PDS system efficiently degraded bisphenol A (BPA) without performance decline for ten cyclic runs. Fe(IV) and radicals ((OH)-O-center dot and SO4 center dot-) were identified as the primary reactive species responsible for universal pollutants oxidation. QSAR study revealed a linear dependence between the kobs values of pollutants and their EHOMO. A-Boron bound with Fe-III species for catalytic reduction, while the semi-metallic surface of A-Boron underwent stepwise transformation, enabling long-lasting iron circulation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Electrochemistry
Jia Zhang, Tianye Zheng, Ka-wai Eric Cheng, Kwok-ho Lam, Steven T. Boles
Summary: Group IVA elements show interesting Na storage capabilities similar to their Li alloy counterparts. However, their potential as anodes for sodium-ion batteries (SIBs) beyond hard carbon is still poorly understood. This study investigates the kinetic aspects of sodiation of Si and Ge, revealing that sodiation of Ge is kinetically limited and the phase transformations can be facilitated by temperature increases or sodiation rate decreases. The findings provide valuable insights into the sodiation mechanisms and potential advancements in SIBs.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Anna Wang, Zhechao Hua, Zihao Wu, Chunyan Chen, Shaodong Hou, Bangjie Huang, Yuge Wang, Ding Wang, Xuchun Li, Chuanhao Li, Jingyun Fang
Summary: This study examined the effects of bromide (Br-) at fresh water levels on radical chemistry in the UV/peroxydisulfate (UV/PDS) process. The presence of Br- promoted the conversion from sulfate radical (SO4-) to hydroxyl radical (HO-) and secondary reactive bromine species (RBS), significantly altering the radical chemistry of the process. Co-existing Cl- further enhanced the conversion from SO4- to HO- when combined with Br-.
Article
Engineering, Environmental
Di Zeng, Chengjin Li, Wenjing Wang, Lifang Zhang, Yu Zhang, Juxue Wang, Ling Zhang, Xiaoxia Zhou, Wenzhong Wang
Summary: The introduction of a hydrophobic structure using a PTFE coating on Cu-I promotes highly efficient CO2RR with a Faradaic efficiency of 70.2% for C2H4 production. The accelerated diffusion of gas at the interface increases the local concentration of CO2 for electrolysis. The hydrophobic Cu-I/PTFE electrode enhances the production of hydroxyl radicals, stabilizing Cu+ species and facilitating C-C coupling for the selective formation of C2+ products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Barbara Dellago, Altan Alpay Altun, Robert Liska, Stefan Baudis
Summary: Vinyl esters (VEs) have been extensively studied as monomers for additive manufacturing in tissue engineering due to their low cytotoxicity, good biocompatibility, and favorable degradation behavior. However, crosslinked VEs have poor mechanical properties, especially brittleness. A previous study found that covalently incorporating high molecular weight additives into the vinyl ester-thiol network can overcome this issue. In this work, poly(epsilon-caprolactone)-based additives modified with photopolymerizable end groups were used to improve the mechanical properties, specifically toughness, and to enable application in digital light processing stereolithography. Different toughness-enhancing additives and their effects on photochemical and (thermo)mechanical characteristics were investigated, as well as the impact of commercial flexible and synthesized rigid thiols on these properties. The results showed that the covalently incorporated toughness enhancers significantly improved the mechanical properties, particularly tensile toughness, without sacrificing photoreactivity.
JOURNAL OF POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Michal Swierczewski, Fabrice Cousin, Ewa Banach, Arnulf Rosspeintner, Latevi Max Lawson Daku, Abolfazl Ziarati, Rania Kazan, Gunnar Jeschke, Raymond Azoulay, Lay-Theng Lee, Thomas Buergi
Summary: A bidentate chiral dithiol (diBINAS) is used to connect Au-25 nanoclusters into oligomers. The stable fractions obtained through size separation are analyzed by various techniques to determine their structure and optical properties. The diBINAS molecule can be considered as a templating molecule for the directed self-assembly of metal clusters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Correction
Polymer Science
Benjamin Grob, Benedikt Frieser, Robert Liska, Yohann Catel
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Werner Seebacher, Marcel Kaiser, Pascal Maeser, Robert Saf, Eva-Maria Pferschy-Wenzig, Robert Weis
Summary: Several 1-benzyl and 1,3-dibenzyl derivatives of tetrahydropyridinylidene salts with varying electron withdrawing substituents at the aromatic residues have been synthesized and investigated for their biological activities and cytotoxicity. Characterization of these compounds was carried out using FT-IR, HRMS and NMR spectroscopy.
MONATSHEFTE FUR CHEMIE
(2023)
Article
Chemistry, Multidisciplinary
Katharina Gallas, Dominik Wohlmuth, Zhiquan Li, Aliasghar Ajami, Aleksandr Ovsianikov, Robert Liska, Christian Slugovc
Summary: This study reports the synthesis of two dye-labeled azides through de-symmetrization using a copper (I)-catalyzed alkyne-azide cycloaddition (CuAAC) method. Dansyl derivative and perylene diimide derivative with alkyne functional groups were employed as the fluorescent dyes. The photo-physical properties of these dye dyads were described, and their performance in multi-photon grafting onto polyethylene glycol-based hydrogels was investigated. It was found that the dansyl-conjugated BAC derivative was suitable for multi-photon grafting with lasers operating at 800 nm, while the perylene diimide-bearing dye did not yield the desired result.
MONATSHEFTE FUR CHEMIE
(2023)
Article
Chemistry, Multidisciplinary
Ke-Feng Zhang, Nidal Saleh, Michal Swierczewski, Arnulf Rosspeintner, Francesco Zinna, Gennaro Pescitelli, Celine Besnard, Laure Guenee, Thomas Burgi, Jerome Lacour
Summary: A chiral bispyrene macrocycle was synthesized for intermolecular excimer fluorescence upon aggregation using a double hydrothiolation method followed by intramolecular oxidation. High stereoselectivity was achieved for the thiol-ene additions under templated conditions. The structural evolution upon aggregation was monitored by ECD/CPL.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Lisa Staubmann, Agnes Mistlberger-Reiner, El Mehdi Raoui, Gertrude Brunner, Lisa Sinawehl, Marion Winter, Robert Liska, Marc Pignitter
Summary: This study investigates the stabilizing effects of pectin, guar gum, locust bean gum, and their combinations on ready-to-drink beverages containing 7% orange juice. Results show that in beverages with larger juice particles (0.6-200 μm), using 2.5 g pectin and 2.5 g guar gum per kg base is most suitable for stabilizing turbidity, while in beverages with smaller juice particles (0.5-120 μm), using 2 g pectin or 2.5 g pectin and 2.5 g locust bean gum per kg base can maintain stability. The combination of hydrocolloids has greater effects on long-term storage stability of the beverages compared to individual stabilizers.
FOOD HYDROCOLLOIDS
(2023)
Article
Chemistry, Physical
Jihad Sissaoui, Darya S. Budkina, Eric Vauthey
Summary: This study reveals that the broadening of the absorption band of crystal violet is caused by torsional disorder in the ground-state, with the center of the band being mainly due to symmetric molecules and the edges originating from transitions to symmetry-broken molecules. Transient-absorption measurements show that these two groups of molecules can interconvert rapidly in liquid but not in a rigid environment.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ines Taarit, Filipe Alves, Amina Benchohra, Laure Guenee, Bahman Golesorkhi, Arnulf Rosspeintner, Alexandre Furstenberg, Claude Piguet
Summary: This study successfully achieved molecular-level linear light upconversion by synthesizing a compact ligand [L2]+, which significantly reduced the distance between the sensitizer and activator. This mechanism allows near-infrared excitation to be converted into visible light, with an unprecedented brightness. Rating: 8/10.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Abolfazl Ziarati, Jiangtao Zhao, Jafar Afshani, Rania Kazan, Ariel Perez Mellor, Arnulf Rosspeintner, Siobhan McKeown, Thomas Burgi
Summary: Controllable CO2 reduction selectivity can be achieved by tuning the architecture of the photocatalyst. A planar structure (p Au/CN) showed high selectivity for HER with 87%, while a yolk@shell structure (Y@S Au@CN) exhibited high selectivity of carbon products by suppressing the HER to 26%. Further improvement was achieved by surface decorating the yolk@shell structure with Au-25(PET)(18) clusters, resulting in longer charge separation. The optimized Au@CN/Au-c/G Y@S structure achieved high photocatalytic CO2RR selectivity of 88%.
Article
Engineering, Manufacturing
Viola Hobiger, Anna-Lea Kutsch, Juergen Stampfl, Robert Liska, Stefan Baudis, Peter Krajnc
Summary: A highly reactive thiol-ene high internal phase emulsion was developed for light-driven additive manufacturing, resulting in highly porous customizable poly(high internal phase emulsion) materials. The formulation facilitates short irradiation times and low amounts of photoinitiator, while avoiding the need for harmful solvents. The addition of a selected thiol as a chain-transfer agent improves the brittleness of the acrylate-based system and potential oxygen inhibition, producing printed layers with a thickness<50 μm and an average pore size<5 μm.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
Pragya Verma, Christoph Nancoz, Johann Bosson, Geraldine M. Labrador, Jerome Lacour, Eric Vauthey
Summary: By combining ultrafast time-resolved fluorescence and transient electronic absorption, we investigated the stereoselectivity in the static stage of photoinduced electron transfer (ET). Our results show that the quenching dynamics for different diastereomeric pairs are the same, regardless of solvent polarity.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Pragya Verma, Mariusz Tasior, Palas Roy, Stephen R. R. Meech, Daniel T. T. Gryko, Eric Vauthey
Summary: In polar environments, most quadrupolar dyes behave like their dipolar counterparts when photoexcited. This is due to excited-state symmetry breaking (ES-SB) where the electronic excitation localizes on one side of the molecule. In this study, two A-D-A dyes containing different acceptor groups were investigated using time-resolved vibrational spectroscopy. The results showed that ES-SB occurs in dyes with cyanophenyl acceptors but not with dicyanovinyl acceptors, attributed to differences in electronic coupling between the D-A branches.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jiangtao Zhao, Abolfazl Ziarati, Arnulf Rosspeintner, Yanan Wang, Thomas Buergi
Summary: The conversion of hydrophobic Au25PET18 nanoclusters to Au25SR19 nanoclusters was achieved through ligand exchange reactions with thiolated terpyridine-metal complexes. The preference for ligand addition or exchange was found to be metal dependent. The photophysical properties of the resulting Au25SR19 nanoclusters were significantly different from those of Au25PET18.
Article
Materials Science, Multidisciplinary
Roland Taschner, Thomas Koch, Raffael Wolff, Jurgen Stampfl, Robert Liska, Patrick Knaack
Summary: Sulfonium hexafluorophosphates and perfluorinated tetraphenylborates are commonly used initiators in cationic photopolymerization and have been applied in 3D-printing at high temperatures. The cyanide-ligated borane-based photoinitiator B2 shows higher reactivity and lower cost compared to other borates. B2 exhibits excellent performance in epoxy monomer conversions at a wide range of temperatures. In addition, B2-based formulations are stable and can be sensitized by anthracene derivatives. B2 also outperforms existing sulfonium initiators in terms of layer quality and coloration in hot lithography.
ACS APPLIED POLYMER MATERIALS
(2023)
