Article
Chemistry, Multidisciplinary
Yimin Liang, Shangshang Wang, Min Tang, Lin Wu, Lifang Bian, Liang Jiang, Zheng-Bin Tang, Jiali Liu, Aocong Guan, Zhichang Liu
Summary: In this study, we describe a one-pot synthesis of benzo[1,2-a:3,4-a':5,6-a'']triazulene (BTA) through a tandem reaction involving Suzuki coupling and Knoevenagel condensation. The resulting compound exhibits excellent stability, fluorescence, and large Stokes shifts. Additionally, its nitrated product, BTA-NO2, demonstrates unique solvatochromic effects and hydrogen-bonding-induced emission transfer.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Shyam Kumar Banjare, Pranav Shridhar Mahulkar, Tanmayee Nanda, Bedadyuti Vedvyas Pati, Lamphiza O. Najiar, Ponneri C. Ravikumar
Summary: Alkynes play a crucial role as coupling partners in transition metal-catalysed reactions. Their ability to effectively coordinate with metal d-orbitals makes them highly versatile for the synthesis of valuable organic molecules. Despite extensive research, there is still a lot more to explore in terms of the reactivity of alkynes and their potential applications.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xuan Yang, Frank Rominger, Michael Mastalerz
Summary: Longer acenes with more than six linearly fused six-membered rings have unique photophysical properties and high potential for organic electronics applications, but they rapidly lose chemical stability as size increases. Stabilization approaches involving bulky or electron-withdrawing groups and peri-annulation have been used to stabilize these compounds. Peri-annulated compounds, although no longer real acenes, also exhibit fascinating properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Matthias Schnitzlein, Chongwei Zhu, Kazutaka Shoyama, Frank Wuerthner
Summary: In this study, negatively curved pi-extended pleiadienes were synthesized using palladium-catalyzed reaction. The crystal structure and theoretical calculations revealed the unique properties of these compounds. Additionally, a naphthalene-fused pleiadiene was formed through a chemical reaction, resulting in a new aromatic compound with distinct properties.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
David Savary, Olivier Baudoin
Summary: C-H activation-based ring-forming methods are powerful for constructing complex molecular structures, especially useful for synthesizing chiral polycyclic aromatic hydrocarbons and other important organic electronic materials. A new enantioselective synthesis method using Pd-catalyzed C(sp(2))-H arylation protocol has been described, delivering diverse polycyclic compounds with high yield and good to excellent enantioselectivity, with investigation into their chiroptical properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Khadimul Islam, Vinay Arora, Vikas, Bedabara Nag, Akshai Kumar
Summary: Readily available and inexpensive bromide salt based on earth-abundant nickel has been used as a catalyst for the Suzuki coupling of various aryl halides with good yields and functional group tolerance under ambient conditions. The reaction follows a Ni(0)/Ni(II) catalytic cycle, where the oxidative addition of the aryl halide to Ni(0) is likely the rate-determining step.
Article
Chemistry, Organic
Matthias Schnitzlein, Carina Mutzel, Kazutaka Shoyama, Jeffrey M. Farrell, Frank Wurthner
Summary: In this study, a series of heptagon-extended corannulenes were synthesized using Pd-catalyzed [5+2] annulation from a borinic acid precursor obtained by C-H borylation strategy. Single-crystal X-ray analysis revealed the presence of two conformational enantiomers crystallizing in a racemic mixture. Theoretical calculations were employed to elucidate their optoelectronic properties and aromaticity.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Chang-Sheng Wang, Qiao Sun, Felipe Garcia, Chen Wang, Naohiko Yoshikai
Summary: The study presents a simple and inexpensive catalytic system based on cobalt(II) iodide, 1,3-bis(diphenylphosphino)propane, and Zn for the [2+2+2] cycloaddition of various nitriles and diarylacetylenes to synthesize a broad range of polyarylated pyridines. DFT studies support a reaction pathway involving oxidative coupling of two alkynes, insertion of the nitrile into a cobaltacyclopentadiene, and C-N reductive elimination, leading to the synthesis of tetra- and pentaarylpyridines that can be used as precursors for nitrogen-containing polycyclic aromatic hydrocarbons.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Organic
Aleksandra Khomutetckaia, Niels Hildebrandt, Peter Ehlers, Alexander Villinger, Peter Langer
Summary: The incorporation of heteroatoms into polycyclic aromatic hydrocarbons (PAHs) is a valuable tool to alter their optical and electrochemical properties and is considered a promising next-generation semiconductor material. In this study, the synthesis of diindenopyrene, a fragment of C(70), and two of its nitrogen-doped analogs is reported. The developed synthetic procedure involves Bronsted-acid-mediated cycloisomerization followed by Pd-catalyzed C-H activation. The impact of N-doping on the optical and electrochemical properties is studied and supported by DFT calculations.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Zhitong Zheng, Xu Ma, Xinpeng Cheng, Ke Zhao, Kaylaa Gutman, Tianyou Li, Liming Zhang
Summary: Homogeneous gold catalysis has seen significant development since the turn of the millennium, with oxidative gold catalysis being a vibrant subfield delivering valuable synthetic methods. This comprehensive review covers the mechanistic aspects, oxidants, and synthetic applications of oxidative gold catalysis.
Article
Chemistry, Multidisciplinary
Lili Tang, Yuejun Ouyang, Kai Sun, Bing Yu
Summary: A metal-free visible-light-induced decarboxylative radical addition/cyclization procedure at room temperature was developed for the synthesis of acylated benzimidazo/indolo[2,1-a]isoquinolines. Traditional heating and metal reagents were effectively avoided, and the desired products were obtained in satisfactory yields under mild reaction conditions.
Article
Chemistry, Multidisciplinary
Md Raja Sk, Arya Bhattacharyya, Shuvendu Saha, Arpita Brahma, Modhu Sudan Maji
Summary: Annulative pi-extension (APEX) reaction is a precise synthesis method for polycyclic aromatic hydrocarbons (PAHs) such as nanographene and graphene. In this study, a masked bay-region APEX reaction was successfully used to efficiently synthesize valuable PAH pyrene with substitutions at the challenging K-region. The reaction involved Rh-III-catalyzed C-H activation, alkyne-insertion, intramolecular nucleophilic attack, dehydration, and aromatization steps.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Yusuke Nakakuki, Takashi Hirose, Hikaru Sotome, Min Gao, Daiki Shimizu, Ruiji Li, Jun-Ya Hasegawa, Hiroshi Miyasaka, Kenji Matsuda
Summary: Helically twisted conductive nanocarbon materials are suitable for optoelectronic and electromagnetic molecular devices on the nanometer scale, showing a large effective conjugation length and ultrafast decay dynamics. The extended π-helicenes achieved a large effective conjugation length through helical fusion, leading to an absorption edge in the near-infrared region.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xiushang Xu, Amy L. Vonder Haar, Rengo Yoshioka, Qizheng Zhang, Serhii Vasylevskyi, Andrew J. Musser, Akimitsu Narita
Summary: A benzo[rst]pentaphene derivative, BPP-MeOPA, was synthesized and characterized by NMR and single-crystal X-ray analysis. Investigation of its photophysical properties, including transient absorption spectroscopy, revealed improved absorption and emission features from an S-1 state with excitonic and charge-transfer character by introducing MeOPA groups.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Reka Mokrai, Rozsa Szucs, Matthew P. Duffy, Vincent Dorcet, Thierry Roisnel, Zoltan Benko, Laszlo Nyulaszi, Pierre-Antoine Bouit, Muriel Hissler
Summary: PAHs with planar, twisted, and negatively curved topologies were synthesized from polycyclic phospholes through pericyclic reactions. Deviation from planarity is caused by steric interactions with ester substituents, and their effects on optical and redox properties were studied through DFT calculations. This synthetic approach allows for the preparation of topologically diverse PAHs with tunable electronic properties for potential applications in organic electronics.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Computer Science, Software Engineering
Xin Yang, Li Liu, Chen Zhu, Yingqing Guo, Dake Zhou
Summary: This paper proposes an improved SR algorithm based on low-rank constraint, which achieves better image reconstruction quality and speed by introducing locally weighted regularization and constraints on reconstruction blocks.
Article
Ecology
Chen Zhu, Wande Li, Tremaine Gregory, Duorun Wang, Peng Ren, Di Zeng, Yi Kang, Ping Ding, Xingfeng Si
Summary: The study developed a camera trap sampling method to monitor plant-frugivore interactions in trees, which proved to be reliable in a fragmented landscape. A sampling strategy covering the fruit maturation period was found to be effective in sampling plant-frugivore interactions.
REMOTE SENSING IN ECOLOGY AND CONSERVATION
(2022)
Article
Chemistry, Multidisciplinary
Lun Shu, Yuan Peng, Rui Yao, Hongling Song, Chenyu Zhu, Weishen Yang
Summary: A facile strategy has been developed to construct defect-free and flexible metal-organic framework (MOF)-based membranes with high selectivity. The fabricated soft-solid MOF composite membranes showed excellent separation performance for H-2/CO2 separation. This study demonstrates the potential of MOF-based membranes in practical separation applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Physics, Multidisciplinary
Long-Long Sun, Ya-Peng Hu, Chen-Ping Zhu, Yan-Jun Wang, Pei-Wen Yao
Summary: Investigation on passenger flight delays using statistical physics methods is lacking. This study treats flights as particles and employs quasi-thermodynamic variables to describe their behavior, proposing a new model for delay gases.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Peng Lu, Guanru Zhang, John Apps, Chen Zhu
Summary: This article introduces the features and applications of the PHREEQC program, and evaluates and compares its thermodynamic data files. The results show that using different thermodynamic data files can lead to different modeling results, so it is important for users to specify the data file used when reporting modeling results.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geochemistry & Geophysics
Jinting Kang, Jacquelyn N. Bracco, J. Donald Rimstidt, Gregory H. Zhu, Fang Huang, Chen Zhu
Summary: The study measured barium attachment and detachment fluxes from and to barite crystal surfaces. Experimental data accurately fit the AB crystal growth model, suggesting that barite recrystallization occurs through ion-by-ion addition and removal. Ba attachment and detachment fluxes at a fixed saturation state increase monotonically with [Ba]/[SO4] ratios, potentially impacting isotope and trace element cycling in natural environments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Physics, Multidisciplinary
Chen-Lu Zhu, Bin Hu, Bo Li
Summary: We investigate the monogamy of multipartite quantum discord. The research shows that quantum discord is monogamous for multiqubit systems if it does not increase under the discard of subsystems. We analyze a family of multiqubit states and demonstrate that the above conditions hold. By examining the dynamics of quantum discord and geometric discord under the local decoherence channel based on previous studies, we find that even-partite systems exhibit frozen phenomenon while odd-partite systems do not. In terms of geometric discord, this family of states also shows the frozen phenomenon under local decoherence conditions. The results indicate that compound noises are not necessary for sudden changes in quantum correlation, and one qubit of quantum noise is sufficient. The investigation of these non-loss conditions is of great importance for understanding the evolution of quantum systems in the environment.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Peng Lu, Pan Luo, Wei Wei, Chen Zhu
Summary: Varied concentrations of H2S have been discovered in the carbonate reservoir of the Puguang gas field in China, where thermochemical sulfate reduction (TSR) is considered the primary process for H2S generation. The study conducted reactive transport modeling to simulate TSR and H2S generation processes, indicating that mineralogical composition and gas saturation in the reservoir affect the efficiency and extent of TSR reactions. The modeling results were reliable, with predicted H2S and CO2 concentrations comparable to observed values after calibration.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Energy & Fuels
Chenyang Zhu, Ziwen Zhang, Sa Xue, Kun Hou, Hui Liu, Xiangyang Liu, Maogang He
Summary: This study investigates the association effects on the density and viscosity of fatty acid ester + alcohol mixtures. Experimental results show that the mixtures exhibit positive excess volume and viscosity deviation. By employing the Cubic-Plus-Association equation of state (CPA EoS) and the friction theory model, the properties of the mixtures are successfully modeled and the relationships between their associations and density, viscosity, and excess properties are established.
Article
Geochemistry & Geophysics
Jonas Toupal, David R. Vann, Chen Zhu, Reto Giere
Summary: There are several Li-mica and spodumene deposits in Central Europe, with the Cinovec deposit being the largest known hard-rock Li deposit in Europe. The weathering and mining of these deposits may release Li and F into the environment, posing potential health risks. However, the aqueous geochemistry of streams and creeks around Li hard-rock deposits is not well understood.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Chemistry, Applied
Rui Yao, Wenhao Zhang, Yuan Peng, Hongling Song, Chenyu Zhu, Lun Shu, Weishen Yang
Summary: Pure UZM-5 zeolite with nanosheet or rosette-shaped morphology was successfully synthesized by adjusting the synthesis parameters and incorporating trace ethanol in the reagent solution. The pure UZM-5 zeolite showed Lewis acid sites, making it a promising catalyst for electrocatalytic reduction of nitrate to ammonia.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Editorial Material
Geosciences, Multidisciplinary
Chen Zhu, D. Kirk Nordstrom
Article
Green & Sustainable Science & Technology
Peng Lu, Guanru Zhang, Yi Huang, John Apps, Chen Zhu
Summary: This study investigates the potential use of dawsonite mineral trapping for carbon capture and storage (CCS) as a strategy. By utilizing a dawsonite-rich CO2 gas reservoir in northern China as a natural analogue, along with numerical modeling, the study demonstrates the possibility of generating a large amount of dawsonite in sandstone formations. The short-term trapping of CO2 in dawsonite helps lower CO2 pressure and mitigates the risk of leakage, while the re-dissolution of dawsonite facilitates the dissipation of CO2 over time. Considering aquifer geochemistry can significantly increase the number of potential CCS sites globally.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Geosciences, Multidisciplinary
Chen Zhu, Alan E. Fryar, John Apps
Summary: Research in hydrogeochemistry has made significant progress in the past two decades, including arsenic contamination in groundwater, the use of isotopic and chemical tracers, chemical reaction kinetics, and the transformation of geochemical modeling. In the future, advancements in technology such as machine learning, cyberinfrastructure, and isotope analytical tools will enable breakthrough research and enhance the role of hydrogeochemistry in addressing climate change and the transition to renewable energies.
Article
Chemistry, Multidisciplinary
Yiming Jiang, Jiawei Zhu, Li Li, Yahui Gao, Juncai Leng, Jiai Yan, Shuoming Liu, Feng Zhang, Han Liu, Chenlu Zhu, Lichun Guo, Haijiao Xie, Wei Zhao
Summary: Researchers have designed and fabricated a novel peroxidase mimic catalyst based on Pd@PtxRu4-x (1 <= x <= 3). The catalyst exhibits higher catalytic activity and kinetics compared to classical PtRu nanozyme and horseradish peroxidase. Density functional theory calculations suggest that the superior catalytic performance is due to the modulation of the adsorption behavior of key reaction intermediates on the surface. The catalyst also shows potential for sensing glucose and glutathione molecules in human serum.