Article
Chemistry, Multidisciplinary
Jaya Mehara, Brandon T. Watson, Anurag Noonikara-Poyil, Adway O. Zacharias, Jana Roithova, H. V. Rasika Dias
Summary: This paper investigates the interactions between copper(I), silver(I), and gold(I) metals and pi-ligands, showing that these interactions are influenced by the electron-donating and electron-withdrawing substituents of the ancillary ligands.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Physical
Jessica Rodriguez, David Vesseur, Alexis Tabey, Sonia Mallet-Ladeira, Karinne Miqueu, Didier Bourissou
Summary: A (MeDalphos)AuCI complex has been discovered to efficiently catalyze the cross-coupling reaction of indoles and allyl acetates/alcohols. The reaction tolerates various functional groups and selectively produces branched C3-allylated products. It utilizes the hemilabile character of the P<^>N ligand.
Article
Chemistry, Organic
Peizhuo Lv, Ali Wang, Xin Xie, Yulong Chen, Yuanhong Liu
Summary: An efficient method for the coupling of allyl trifluoroborates with aryl halides has been developed. The method offers high efficiency, mild reaction conditions, wide substrate scope, and functional group compatibility. Mechanistic studies suggest the formation of a pi-allyl nickel(III) intermediate as a key reaction intermediate.
Article
Chemistry, Multidisciplinary
Arpan Das, Soumi Chakraborty, Swadhin K. Mandal
Summary: Abnormal N-heterocyclic carbene (aNHC) based Ni(II) pi-allyl complexes (3 and 4) were synthesized from a Ni(0) precursor and characterized. The mechanism for the formation of Ni(II) eta(3)-allyl complexes from a Ni(0) precursor using a free abnormal N-heterocyclic carbene was elucidated. Exposure of complex 3 to O-2 gas under ambient pressure resulted in the activation of molecular oxygen to form a mu-hydroxo bridged Ni(II) dimer.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Review
Chemistry, Physical
Jaehan Bae, Eun Jin Cho
Summary: Bidentate P,N ligands, integrating phosphine and nitrogen donors, have versatile characteristics and offer electronic and steric tunability. This Review focuses on Ni-catalyzed cross-coupling reactions mediated by P,N ligands, with their asymmetrical nature playing a crucial role in the catalytic cycle and providing control, stability, and unique regioselectivity in catalytic processes.
Article
Chemistry, Multidisciplinary
Ruiping Li, Nitsan Barel, Vasudevan Subramaniyan, Orit Cohen, Francoise Tibika, Yuri Tulchinsky
Summary: This article reports the synthesis and characterization of complexes of sulfonium cations Rh(i) and Pt(ii), and establishes the coordination of aromatic sulfonium for the first time. The computational analysis shows that sulfonium cations have strong pi-accepting properties, and embedding them within a pincer framework enhances their pi-acidity. The article suggests that these pincer complexes may turn sulfonium cations into powerful tools for pi-acid catalysis.
Article
Chemistry, Physical
Angela Burhenn, Roberta Bavaro, Viktoria H. Gessner
Summary: In this study, a series of chloro- and polyhalogenated compounds, including polychlorinated biphenyls (PBCs) extracted from construction dust, were successfully dehalogenated under mild reaction conditions using palladium complexes with ylide-substituted phosphines (YPhos) as ligands. Ethanol was used as the hydride source in the reaction, and site-selective deuterations could be achieved by switching to deuteroethanol.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Vitor Rosa, Helena Laronha, Clara S. B. Gomes, Cristina M. Cordas, Joao Brinco, Flavia Freitas, Marco D. R. Gomes da Silva, Teresa Aviles
Summary: A new neutral dimeric Ar-BIAN Cu(I) complex was synthesized and its structure and electrochemical properties were studied. The complex exhibited good catalytic activity in the oxidation of benzylic alcohols. Rating: 8 points
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Jairus L. Lamola, Paseka T. Moshapo, Cedric W. Holzapfel, Banothile C. E. Makhubela, Munaka Christopher Maumela
Summary: The study investigates the influence of ligand steric bulk on the Pd-catalyzed borylation of ortho-substituted aryl bromides and chlorides under mild conditions (25 - 80 degrees C). Catalysts derived from the less hindered biaryl phobane[3.3.1] 1 (cone angle = 178.5 degrees) exhibited high efficiency for borylation of various ortho-substituted aryl bromides. Dialkylbiaryl phosphine 5 (cone angle = 181.3 degrees) and biaryl phosphacycle 2 (cone angle = 220.0 degrees) possessed suitable ligand steric bulk for facile Pd-catalyzed borylation of ortho-substituted aryl chlorides.
TETRAHEDRON LETTERS
(2023)
Article
Chemistry, Physical
Hunter Shirley, Thomas More Sexton, Nalaka P. Liyanage, Morgan A. Perkins, Shane A. Autry, Louis E. McNamara, Nathan I. Hammer, Sean R. Parkin, Gregory S. Tschumper, Jared H. Delcamp
Summary: The study demonstrates that electron withdrawing substituents in the pyNHC-aryl ligand and extending conjugation along the backbone of the ligand can impact the photocatalytic CO2 reduction reaction. A strong correlation is observed between excited-state lifetimes, photocatalytic rates, and computationally determined dissociation energy of the labile ligand in the complexes.
Article
Chemistry, Physical
Jihong Xu, Yanhong Liu, Chengbu Liu, Dongju Zhang
Summary: DFT calculations reveal the mechanism preference in the Pd(0)-catalyzed reaction of 1,2-allenyl ketones with aryl boronic acids, dependent on the substituents.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Agata Szlapa-Kula, Magdalena Malecka, Anna M. Maron, Henryk Janeczek, Mariola Siwy, Ewa Schab-Balcerzak, Marcin Szalkowski, Sebastian Mackowski, Tomasz Pedzinski, Karol Erfurt, Barbara Machura
Summary: In this study, eight rhenium(I) complexes incorporating 2,2':6',2''-terpyridine (terpy) and 2,6-bis(pyrazin-2-yl)pyridine (dppy) with appended 1-naphthyl-, 2-naphthyl-, 9-phenanthrenyl, and 1-pyrenyl groups were comprehensively studied. The presence of naphthyl and phenanthrenyl substituents did not significantly affect the energy of the MLCT absorption and emission bands, while the addition of the electron-rich pyrenyl group resulted in a noticeable red shift and increased molar absorption coefficients of the lowest energy absorption. The excited states of complexes with 1-pyrenyl-functionalized ligands were found to exhibit predominant characteristics of (ILpyrene)-I-3/(ILCTpyrene -> terpy)-I-3 at 77 K.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Saqib Javed, Dennis Ropel, Dieter Vogt
Summary: Polyethylene terephthalate (PET) waste is difficult to degrade and has a low recycling rate, but glycolysis using sodium ethoxide (EtONa) as a catalyst shows promise for chemical recycling of PET. Through response surface methodology and regression models, optimization of reaction parameters resulted in high PET conversion (98%) and BHET yield (76%). Compared to other catalysts, EtONa showed superior performance, making it a promising low-cost catalyst for large-scale PET depolymerization.
Article
Environmental Sciences
Patrick S. Bauerlein, Maarten W. Erich, Willem M. G. M. van Loon, Svenja M. Mintenig, Albert A. Koelmans
Summary: This study analyzed microplastic particles in marine sediments in coastal and transitional waters in the Netherlands and provided a monitoring and data analysis method. The results showed that the particle size distribution of microplastics followed a power law, and the composition of microplastics varied between different sediment locations. The relative standard error of the mean (RSEM) was used to quantify the micro-spatial variation of microplastic concentrations, which could help optimize the sensitivity of trend detection in microplastic monitoring networks by selecting locations with lower micro-spatial variation.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Patrick S. Bauerlein, Eelco N. Pieke, Frank I. H. M. Oesterholt, Thomas ter Laak, Stefan A. E. Kools
Summary: In this study, two parallel analytical methods were compared, and a microplastics mitigation method was tested. The effectiveness of a bubble curtain in reducing microplastics in a wastewater treatment plant (WWTP)-effluent canal was assessed over six months using laser direct infrared (LDIR) and optical microscopy (OM). The comparison of the two analytical strategies showed similar trends and fluctuations in particle and fibre numbers, but with different absolute values and levels of information provided. LDIR could identify plastic type and shape, while OM could not determine plastic type and had a higher size limit.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xin Tian, Frederic Been, Yiqun Sun, Peter van Thienen, Patrick S. Bauerlein
Summary: Identifying environmental polymers and micro-plastics is crucial, and various spectroscopy techniques and machine learning models can be used for accurate identification and classification. This study compares different machine learning models on different data set sizes and proposes a data augmentation technique for generating synthetic samples. The results show that an ensemble ML model achieves the best performance with a classification accuracy of 99.5%.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
P. Rajapaksha, R. Orrell-Trigg, D. Shah, S. Cheeseman, K. B. Vu, S. T. Ngo, B. J. Murdoch, N. R. Choudhury, H. Yin, D. Cozzolino, Y. B. Truong, A. F. Lee, V. K. Truong, J. Chapman
Summary: Antimicrobial resistance is a global health challenge, which requires innovative nanomaterials and antimicrobial strategies. In this study, a broad-spectrum antimicrobial nanomaterial combining light-responsive ZnO nanoparticles and reduced graphene oxide was developed for water depollution. The nanocomposite demonstrated strong antimicrobial efficacy against methicillin-resistant Staphylococcus aureus, Escherichia coli, and Salmonella typhimurium bacteria, and also showed potential for photocatalytic degradation of dye.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Organic
Thomas Kuckhoff, Richard C. Brewster, Calum T. J. Ferguson, Amanda G. Jarvis
Summary: The design and development of artificial metal-free photoenzymes aim to combine the selectivity of enzymatic reactions with the benefits of modern synthetic photocatalysts. This study presents the design of a novel artificial photoenzyme by integrating an organophotocatalytic moiety into a steroid carrier protein (SCP-2L). The modified photoenzymes showed selectivity for the oxidation of organic sulfides, with up to 192 turnovers.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Joao Otavio Mendes, Andrea Merenda, Karen Wilson, Adam Fraser Lee, Enrico Della Gaspera, Joel van Embden
Summary: The growth of (001) oriented antimony chalcogenide thin films can be controlled by tuning the substrate nanostructure, which is crucial for enhancing the performance of these films.
Review
Chemistry, Physical
Hamidreza Arandiyan, Putla Sudarsanam, Suresh K. Bhargava, Adam F. Lee, Karen Wilson
Summary: Biomass is a renewable energy source that is being increasingly utilized due to concerns about climate change caused by fossil fuel consumption. Waste biomass-derived fuels and chemicals offer a solution to reduce reliance on fossil fuels and achieve "Net Zero 2050 CO2 emissions" with environmental, health, and economic benefits. This review focuses on the use of perovskite oxide catalysts for biomass valorization, discussing their structure-reactivity relationships in various reactions. The study highlights the prospects and challenges for the broader application of perovskite oxide catalysts in biomass valorization.
Article
Chemistry, Multidisciplinary
Sabina Siles-Quesada, Christopher M. A. Parlett, Alexander C. Lamb, Jinesh C. Manayil, Yang Liu, Jim Mensah, Hamidreza Arandiyan, Karen Wilson, Adam F. Lee
Summary: Researchers successfully synthesized an ordered macroporous KIT-6 material with 370nm macropores, a face-centered cubic Ia3d structure, and 5nm mesopore channels. After functionalization, this material allows rapid diffusion and esterification of fatty acids. Compared with traditional mesoporous PrSO3H/KIT-6, the esterification rate of fatty acids increased by 5 times, and it also showed a 33% enhancement compared with ordered macroporous PrSO3H/SBA-15.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Energy & Fuels
Prince J. J. Sagayaraj, Ashil Augustin, Mariyappan Shanmugam, Brahmari Honnappa, Thillai Sivakumar Natarajan, Karen Wilson, Adam F. Lee, Karthikeyan Sekar
Summary: This review discusses the sustainable production of solar fuels through reduction of molecular CO2 using photocatalysts, emphasizing the importance of this approach for controlling global warming. The unique properties of graphene quantum dots (GQD), such as enhanced solar light absorption and high photocatalytic efficiency, are highlighted. Additionally, the challenges and future outlook of GQD-based photocatalytic systems for solar fuels production are presented.
Article
Chemistry, Multidisciplinary
Jiajia Zhao, Yuan Wang, Hamidreza Arandiyan, Anita M. D'Angelo, Aaron Seeber, Daksh Shah, Rachel A. Caruso, Ivan S. Cole, Yunxia Yang, Karen Wilson, Renata Lippi, Adam F. Lee
Summary: We demonstrate how subtle changes in a mixed phase zirconia support induce large changes in catalyst activity and selectivity. Ru/Sn0.2Zr0.8O2 catalyst exhibited similar structrue and metal ion distribution as Ru/ZrO2, but XRD evidence showed new crystalline phases where Sn substituted for Zr. Operando infrared spectroscopy identified linear surface CO* as a catalytic spectator, and Sn0.2Zr0.8O2 promoted CO2 decomposition, favoring a reverse water gas shift pathway.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Oliver D. Johnson, Stephen G. Wainwright, Adrian C. Whitwood, Duncan W. Bruce
Summary: Hydrogen-bonded complexes were formed between 4-alkoxystilbazoles and different chlorophenols, and their crystal structures were determined. The complexes showed a dimeric motif with two chlorophenols and a stilbazole forming hydrogen bonds. Most complexes exhibited liquid crystal properties except those with pentachlorophenol. The stability of mesophases in these complexes was lower compared to fluorophenol analogues due to the larger size of chlorine atoms.
Correction
Chemistry, Physical
Vannia C. dos Santos-Durndell, Lee J. Durndell, Mark A. Isaacs, Adam F. Lee, Karen Wilson
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Vannia C. C. dos Santos-Durndell, Lee J. J. Durndell, Mark A. A. Isaacs, Adam F. F. Lee, Karen Wilson
Summary: Despite its significance in aqueous phase reactions and those wherein water is a by-product, the hydrophobicity of catalysts is often neglected. In this study, we synthesized WOx/ZrOx impregnated periodic mesoporous organosilicas (PMOs) with varying organic framework content. The incorporation of phenyl groups into the framework of mesoporous SBA-15 silica imparted surface hydrophobicity and tuned the solid acidity, leading to excellent turnover frequencies (TOFs) for the esterification reactions. The hydrophobic, solid acid catalysts showed superior activity and stability compared to the hydrophilic catalysts, making them suitable for aqueous phase synthesis.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Linda J. McAllister, James Taylor, Natalie E. Pridmore, Alice J. McEllin, Adrian C. Whitwood, Peter B. Karadakov, Duncan W. Bruce
Summary: Strongly halogen-bonded complexes between 4-alkoxyphenyl-4-pyridines and iodine, ICl, and IBr were studied using single crystal X-ray crystallography. The complexes exhibited a liquid-crystalline smectic A phase upon heating, although decomposition was observed. Small-angle X-ray scattering revealed that the complexes formed an antiparallel, head-to-head dimeric arrangement in the mesophase. Quantum chemical calculations demonstrated that the complexes had high dipole moments and the mesophase stability was attributed to antiparallel correlations induced by the strong molecular dipoles.
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
