bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kaskadenreaktionen von aryl‐substituierten terminalen Alkinen unter Beteiligung von in situ erzeugten α‐Imino‐Goldcarbenen
Authors: Sun Qiaoying , Hüßler Christopher , Kahle Justin , Mackenroth Alexandra V. , Rudolph Matthias , Krämer Petra , Oeser Thomas , Hashmi A. Stephen K. 
Published: October 2023

AbstractWir berichten über eine effiziente, hochselektive und divergente Synthesemethode zur Herstellung von 2‐substituierten Indolen und aryl‐anellierten Carbazolen über die intermolekulare Erzeugung von α‐Imino‐Goldcarbenen aus terminalen Alkinen oder Diinen in Kombination mit Sulfiliminen. Wichtig ist, dass die Tandemreaktion durch eine intermolekulare Goldcarbenbildung/C−H‐ Anellierung, gefolgt von der Aktivierung eines zweiten Alkins, die zu einer 6‐endo‐dig‐Zyklisierung führt, abläuft, was sich deutlich von früheren Ansätzen der dualen Aktivierung oder 1,6‐Carbenverschiebung für Diin‐Systeme unterscheidet. Im Falle von ortho‐Alkinylanilin als Ausgangsmaterial wurde eine unerwartete regioselektive Bildung der Indolkomponente über den intermolekularen Weg anstelle einer intramolekularen Hydroaminierung entdeckt. Diese Reaktivität ebnete den Weg für eine Eintopfsynthese des 11H‐Indolo‐[3,2‐c]‐Chinolin‐Gerüsts, indem das gebildete Aminoindol für eine anschließende Pictet–Spengler‐Reaktion mit Aldehyden genutzt wurde. Die photophysikalischen Eigenschaften der Carbazole zeigten eine gute violett‐blaue Emission mit Quantenausbeuten von bis zu 40 %.
Multicomponent Synthesis of Imidazole‐Linked Fully Conjugated 3D Covalent Organic Framework for Efficient Electrochemical Hydrogen Peroxide Production
Authors: Zhang Yuting , Qiao Zelong , Zhang Rui , Wang Zhengqi , Wang Hui‐Juan , Zhao Jie , Cao Dapeng , Wang Shitao 
Published: October 2023

AbstractThe semiconducting properties and applications of three dimensional (3D) covalent organic frameworks (COFs) are greatly hampered because of their long‐ranged non‐conjugated skeletons and relatively unstable linkages. Here, a robust imidazole‐linked fully conjugated 3D covalent organic framework (BUCT‐COF‐7) is synthesized through the one‐pot multicomponent Debus‐Radziszewski reaction of the saddle‐shaped aldehyde‐substituted cyclooctatetrathiophene, pyrene‐4,5,9,10‐tetraone, and ammonium acetate. The semiconducting BUCT‐COF‐7, as a metal‐free catalyst, shows excellent two electron oxygen reduction reaction (ORR) activity in alkaline medium with high hydrogen peroxide (H2O2) selectivity of 83.4 %. When the BUCT‐COF‐7 as cathode catalyst is assembled into the electrolyzer, the devices showed high electrochemical production rate of H2O2 up to 326.9 mmol g−1 h−1. The accumulative amount of H2O2 could totally degrade the dye methylene blue via Fenton reaction for wastewater treatment. This is the first report about intrinsic 3D COFs for efficient electrochemical synthesis of H2O2, revealing the promising applications of fully conjugated 3D COFs in the environment‐related field.
Dynamic Stereochemistry of M8Pd6 Supramolecular Cages Based on Metal‐Center Lability for Differential Chiral Induction, Resolution, and Recognition
Authors: Huang Yin‐Hui , Lu Yu‐Lin , Zhang Xiao‐Dong , Liu Chen‐Hui , Ruan Jia , Qin Yu‐Han , Cao Zhong‐Min , Jiang Jijun , Xu Hai‐Sen , Su Cheng‐Yong 
Published: October 2023

AbstractA series of isostructural supramolecular cages with a rhombic dodecahedron shape have been assembled with distinct metal‐coordination lability (M8Pd6‐MOC‐16, M=Ru2+, Fe2+, Ni2+, Zn2+). The chirality transfer between metal centers generally imposes homochirality on individual cages to enable solvent‐dependent spontaneous resolution of Δ8/Λ8−M8Pd6 enantiomers; however, their distinguishable stereochemical dynamics manifests differential chiral phenomena governed by the cage stability following the order Ru8Pd6>Ni8Pd6>Fe8Pd6>Zn8Pd6. The highly labile Zn centers endow the Zn8Pd6 cage with conformational flexibility and deformation, enabling intrigue chiral‐Δ8/Λ8−Zn8Pd6 to meso‐Δ4Λ4−Zn8Pd6 transition induced by anions. The cage stabilization effect differs from inert Ru2+, metastable Fe2+/Ni2+, and labile Zn2+, resulting in different chiral‐guest induction. Strikingly, solvent‐mediated host–guest interactions have been revealed for Δ8/Λ8−(Ru/Ni/Fe)8Pd6 cages to discriminate the chiral recognition of the guests with opposite chirality. These results demonstrate a versatile procedure to control the stereochemistry of metal‐organic cages based on the dynamic metal centers, thus providing guidance to maneuver cage chirality at a supramolecular level by virtue of the solvent, anion, and guest to benefit practical applications.
Rheological behaviors and foaming behaviors of crosslinked ethylene–vinyl acetate with polyfunctional monomers
Authors: Wang Xiaodong , Hua Lei , Zhang Jiachen , Luo Lihua 
Published: October 2023

AbstractTo produce ethylene–vinyl acetate (EVA) foams with a higher foaming ratio and stable cell size, the efficiency of the crosslinking reaction is required to conduct simultaneously with the blowing reaction. Hence, the multifunctional monomer trimethylolpropane trimethacrylate (TMP) as a crosslinking promoter and a crosslinking agent dicumyl peroxide are used together as a crosslinking system to EVA foaming, when chemical blowing agent azodicarbonamide (ADC) is used. The TMP concentration of approximately 1.0 phr (per hundred resin) is most effective for balancing the expansion ratio and fine cell size. In the SEM diagram and expansion ratio results, it can be found that when the concentration of TMP ranges from 0 to 1.0 phr, the cell mean size is reduced from 360.3 to 140.5 μm and the expansion ratio is reduced from 13.6 to 9.1 at 170°C. The results of time‐sweep experiment of thermogravimetric analysis (TGA) show that the foaming time of ADC in the melt increases with the addition of TMP. Capillary rheometer and rotational rheometer tests show that the viscosity and the crosslinking efficiency of the melt are improved with the TMP addition. The curing time has been reduced from 2.93 to 2.22 min for 170°C.
The effects of graphene oxide addition on low velocity impact performance of aramid fiber reinforced epoxy composites
Authors: Azimpour‐Shishevan Farzin , Mohtadi‐Bonab M. A. , Rahmatinejad Bahman 
Published: October 2023

AbstractIn this study, the impact of incorporating graphene oxide (GO) nanoparticles into the matrix of aramid fiber reinforced polymer (AFRP) composites was investigated. The GO nanoparticles were dispersed in the AFRP matrix at three different weight percentages: 0.1%, 0.3%, and 0.5%. The fabrication of the GO dispersed AFRP nanocomposites was achieved using the vacuum assisted resin infusion molding (VARIM) method, and the AFRP plates were cut using a water jet. The sectioned specimens of the fabricated nanocomposites were subjected to low velocity impact tests. The effects of introducing GO nanoparticles at different percentages were evaluated by analyzing the contact force, deflection, maximum absorbed energy versus time and contact force versus deflection curves. Finally, the key parameters of low velocity impact, including contact force, deflection, and maximum absorbed energy, were compared for the different fabricated AFRP nanocomposites. Based on the results, the AFRP composite with 0.3 wt.% of GO nanoparticles exhibited the best performance under low velocity impact loading conditions. However, the agglomeration of nanoparticles became a significant challenge when higher percentages of GO nanoparticles were added to the composite structure. The findings highlight the importance of determining the optimal percentage of nano materials for incorporation into composite structures.
Escalated Phase Separation Driven Enhanced Magnetoresistance in Manganite/Iridate Epitaxial Heterostructures
Authors: Roy Pinku , Zhang Di , Kunwar Sundar , Cucciniello Nicholas , Mazza Alessandro R. , Chen Aiping , Jia Quanxi 
Published: October 2023

AbstractPhase separation in manganites leads to unique magnetic and electronic properties. 50% Ca‐doped LaMnO3 (LCMO), at the boundary of ferromagnetic (FM) and antiferromagnetic (AFM) states in La1‐xCaxMnO3 (0 ≤ x ≤ 1), is an ideal system to study phase separation behavior. The investigation reveals the effect of a 5d‐metal perovskite SrIrO3 (SIO) on the phase separation, magnetic, and magnetoresistance (MR) properties of LCMO. Single‐layer and bilayer LCMO films, both appear purely ferromagnetic along the in‐plane (IP) magnetic field direction, but show the tendency of temperature‐dependent ferromagnetic and antiferromagnetic or charge‐ordered (CO) phase separation with the out‐of‐plane (OOP) applied field. The MR, and colossal magnetoresistance (CMR), observed in LCMO/SIO bilayers are two orders and an order of magnitude (in %) larger, respectively than that in the single‐layer film. The coexistence of FM and AFM/CO phases is responsible for the CMR and MR enhancement in the LCMO/SIO bilayer, pointing toward the importance of the phase separation and competition of both the individual materials in enhancing their magnetic and electronic properties.
New paracetamol hybrids as anticancer and COX‐2 inhibitors: Synthesis, biological evaluation and docking studies
Authors: Alam Mohammad Mahboob , Alsenani Nawaf I. , Abdelhamid Antar A. , Ahmad Abrar , Baothman Othman A. , Hosawi Salman A. , Altayeb Hisham , Nadeem Mohammad Shahid , Ahmad Varish , Nazreen Syed , Elhenawy Ahmed A. 
Published: October 2023

AbstractDrug repurposing is an emerging field in drug development that has provided many successful drugs. In the current study, paracetamol, a known antipyretic and analgesic agent, was chemically modified to generate paracetamol derivatives as anticancer and anticyclooxygenase‐2 (COX‐2) agents. Compound 11 bearing a fluoro group was the best cytotoxic candidate with half‐maximal inhibitory concentration (IC50) values ranging from 1.51 to 6.31 μM and anti‐COX‐2 activity with IC50 = 0.29 μM, compared to the standard drugs, doxorubicin and celecoxib. The cell cycle and apoptosis studies revealed that compound 11 possesses the ability to induce cell cycle arrest in the S phase and apoptosis in colon Huh‐7 cells. These results were strongly supported by docking studies, which showed strong interactions with the amino acids of the COX‐2 protein, and in silico pharmacokinetic predictions were found to be favorable for these newly synthesized paracetamol derivatives. It can be concluded that compound 11 could block cell growth and proliferation by inhibiting the COX‐2 enzyme in cancer therapy.
A Metal‐Organic Complex Constructed from Co(II), Azo‐amide‐pyridyl and Benzenetricarboxylate Mixed Ligands: Efficient Catalysis for Selective Oxidation of Benzyl Alcohols to Benzyl Acids
Authors: Li Yuyao , Li Xiaohui , An Zhixuan , Chu Yang , Wang Xiuli 
Published: October 2023

AbstractBy using one‐step hydrothermal synthesis, a novel metal‐organic complex containing Co(II), the azo‐amide‐pyridyl ligand (E)‐4,4′‐(diazene‐1,2‐diyl)bis(N‐(pyridin‐3‐yl)benzamide (DABA) and benzenetricarboxylate was synthesized, with a molecular formula of [Co2(DABA)0.5(MTC)(μ3‐OH)(H2O)2] ⋅ 2H2O (namely 1, DABA=(E)‐4,4′‐(diazene‐1,2‐diyl)bis(N‐(pyridin‐3‐yl)benzamide, H3MTC=1,2,4‐benzenetricarboxylic acid) which was characterized by single crystal X‐ray diffraction, PXRD, IR spectroscopy, TGA, and XPS. In the structure of complex 1, tetranuclear Co(II) clusters were connected by MTC to form a 2D bilayer structure and further constructed a 3D structure with DABA ligand. Complex 1 was used as an efficient heterogeneous catalyst for the oxidation of benzyl alcohol, and the conversion rate of benzyl alcohol reached 98.6 % and the selectivity of benzoic acid reached 94.8 %. In addition, complex 1 can be reused 5 times without significant loss of activity. The oxidation of benzyl alcohol with different substituents also showed satisfactory conversion and selectivity, indicating that complex 1 had good catalytic performance.
The therapeutic effect of engineered phage, derived protein and enzymes against superbug bacteria
Authors: Boroujeni Mahshid Badakhshan , Mohebi Samane , Malekian Azam , Shahraeini Seyed Sadegh , Gharagheizi Zahra , Shahkolahi Shaghayegh , Sadeghi Rezvaneh Vahedian , Naderifar Mahin , Akbarizadeh Majid Reza , Soltaninejad Simin , Moghadam Zahra Taati , Moghadam Majid Taati , Mirzadeh Farzane 
Published: October 2023

AbstractDefending against antibiotic‐resistant infections is similar to fighting a war with limited ammunition. As the new century unfolded, antibiotic resistance became a significant concern. In spite of the fact that phage treatment has been used as an effective means of fighting infections for more than a century, researchers have had to overcome many challenges of superbug bacteria by manipulating phages and producing engineered enzymes. New enzymes and phages with enhanced properties have a significant impact on the ability to fight antibiotic‐resistant infections, which is considered a window of hope for the future. This review, therefore, illustrates not only the challenges caused by antibiotic resistance and superbug bacteria but also the engineered enzymes and phages that are being developed to solve these issues. Our study found that engineered phages, phage proteins, and enzymes can be effective in treating superbug bacteria and destroying the biofilm caused by them. Combining these engineered compounds with other antimicrobial substances can increase their effectiveness against antibiotic‐resistant bacteria. Therefore, engineered phages, proteins, and enzymes can be used as a substitute for antibiotics or in combination with antibiotics to treat patients with superbug infections in the future.
Guidelines for developing the shari'ah‐compliant products and shari'ah governance for sustainable banks in Bangladesh
Authors: Uddin Mohammad Nazim , Hosen Mosharrof , Azad Md. Abul Kalam , Günerhan Hatıra , Hoque Nazamul , Uddin Mahi , Mamun Abdullahil 
Published: October 2023

AbstractThe industry of Islamic banking and finance (IBF) has undergone rapid expansion over the past forty years. However, it's imperative that this sector continues to evolve—making sure it aligns with contemporary market trends while staying abreast with modern financial practices. With financial offerings becoming more complex than ever before, adhering closely to shari'ah principles certainly poses a newer level of daunting challenges that need urgent attention in this burgeoning field. Moreover, the infamous products and current shari'ah governance of Islamic banks have been widely debated following the publication of an article titled “Terrible November for Islamic banks” in a reputable newspaper, Prothom Alo, 2022. In order to bridge the gap this study investigates drivers, enablers, and inhibitors of shari'ah‐compliant products and the successful implementation of shari'ah governance for sustainable Islamic banks in Bangladesh. The qualitative data have been collected through in‐depth personal interviews and focus group discussions with 41 well‐known scholars. The analysis shows shari'ah board and research division are required to collaborate to develop shari'ah‐compliant products as outlined in the Qur'an and Hadith. Additionally, a strong legislative framework for shari'ah‐compliant product development and shari'ah governance is essential to promote a sustainable Islamic banking industry. Good shari'ah governance and compliance in a banking institution are significantly dependent on the good intentions of its board members and operational managers. The study offers a legal framework and core value‐based banking that develops unique and fully shari'ah‐compliant products to uphold sustainable development goals (SDGs). Important policy implications are discussed.
A case report of heterochronic presentation of a bilateral tubal pregnancy
Authors: Mansouri Zeinab , Tarafdari Azam , Azizi Sepideh , Mehdikhani Bahareh , Shababi Amirali , Vaghef Davari Farzad 
Published: October 2023

Key Clinical MessageThis paper highlights that diagnosis and treatment of one ectopic pregnancy does not rule out the happening of a second ectopic pregnancy in the same patient concurrently, especially if the patient has rising β‐hCG and persistent symptoms.AbstractBilateral tubal pregnancy (BTP) is the most uncommon form of tubal ectopic pregnancy. Complications can lead to maternal morbidity and mortality. We reported a case of left tubal pregnancy and the patient underwent laparoscopic salpingostomy. During the follow‐up, the contralateral ectopic pregnancy was discovered and treated with MTX.
Oxygen Vacancy Mediated Reactivity of CaO/CuO Composite for the Synthesis of Amino‐N‐heterocycles
Authors: Rajendran K. , Madampadi Roshni , Shee Sayan , Subramaniam Rameshkumar , Khan Tuhin S. , Gupta Shelaka , Haider M. Ali , Jagadeesan Dinesh 
Published: October 2023

AbstractUtilising the oxygen‐vacancy‐mediated reactivity of CaO/CuO and hydrazine monohydrate in isopropyl alcohol at 353 K, a variety of amino‐derivatives of N‐heterocycles, including pyridine, indole, quinoline, isoquinoline, and benzothiazole, have been selectively synthesised by reducing their nitro analogues. It is demonstrated that CaO/CuO composite is a reusable, solvent‐resilient solid reducing agent that can reduce a variety of nitro‐N‐heterocyclic substrates. The critical role of the structure of CaO/CuO on the nitro‐reduction activity has been studied using spectroscopy and microscopy. DFT simulations indicate the facile formation of oxygen vacancies (EO,vac=−43.4 kJ/mol) on the interface of CaO/CuO surface under reducing environment. The presence of CaO facilitated a stronger interaction of the nitro‐substrate on the oxygen vacant CuO (111) surface, resulting into a significantly lower activation energy (Ea=21.9 kJ/mol) for N−O dissociation. The reaction could be scaled up from 1 to 12 mmol of substrate. CaO/CuO is a reusable and a cost‐effective alternative to the conventional catalyst (Pd/C, Pt/C).
Just‐in‐time latent autoregressive residual generation for dynamic process monitoring
Authors: Hu Shi , Chang Kuan 
Published: October 2023

AbstractWith a goal of timely and adaptively exploiting the inconsistency inherited in the monitored samples of current interest, a novel dynamic process monitoring method based on just‐in‐time latent autoregressive residual generation (JITLAR2G) model is proposed. Different from the mainstream dynamic modeling and monitoring methods which usually train a signature generating mechanism and then repeatedly apply it for online monitored samples, the proposed JITLAR2G‐based approach provides a JITLAR2G model for the online monitored samples after data augmentation, so that the corresponding inconsistency within the given consecutive samples could be timely and adaptively uncovered. Instead of expressing the time‐serial relationship that generally accepted by the normal samples in the given dataset, solving the objective function designed for JITLAR2G in a just‐in‐time manner can adaptively and correspondingly seek but only one projecting vector as well as coefficient vector to generate residual, which points to the potential inconsistency inherited in the monitored samples, for the sole purpose of fault detection. As demonstrated through comparisons, the proposed JITLAR2G model can consistently guarantee its effectiveness, in terms of reducing both false alarm rate and missed alarm rate, for dynamic process monitoring, the salient performance achieved by the proposed JITLAR2G‐based method in contrast to the counterparts can be always confirmed.
Magnetic Relaxations of Chromium Nitride Porphyrinato Complexes Driven by the Anisotropic g‐Factor
Authors: Yamabayashi Tsutomu , Horii Yoji , Li Zhao‐Yang , Yamashita Masahiro 
Published: October 2023

AbstractMolecule‐based magnetic materials are useful candidates as the spin qubit due to their long coherence time and high designability. The anisotropy of the g‐values of the metal complexes can be utilized to access the individual spin of the metal complexes, making it possible to achieve the scalable molecular spin qubit. For this goal, it is important to evaluate the effect of g‐value anisotropy on the magnetic relaxation behaviour. This study reports the slow magnetic relaxation behaviour of chromium nitride (CrN2+) porphyrinato complex (1), which is structurally and magnetically similar with the vanadyl (VO2+) porphyrinato complex (2) which is known as the excellent spin qubit. Detailed analyses for vibrational and dynamical magnetism of 1 and 2 revealed that g‐value anisotropy accelerates magnetic relaxations greater than the internal magnetic field from nuclear spin does. These results provide a design criterion for construction of multiple spin qubit based on g‐tensor engineering.
CoFe Alloys Dispersed on Se, N Co‐Doped Graphitic Carbon as Efficient Bifunctional Catalysts for Zn‐Air Batteries
Authors: Dai Longhua , Feng Chuanzhen , Luo Yangjun , Wan Jin , Sun Yue , Zheng Yanan , Zhang Huijuan , Wang Yu 
Published: October 2023

AbstractThe development of a stable and efficient non‐noble metal catalyst with both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is paramount to achieving the widespread application of Zn‐air batteries (ZABs) but remains a great challenge. Herein, a novel Co3Fe7 alloy nanoparticle dispersed on Se, N co‐doped graphitic carbon (denoted as CoFe/Se@CN) was prepared through a facile hydrothermal and pyrolysis process. The synthesized CoFe/Se@CN exhibits outstanding ORR and OER properties with an ultralow potential gap of 0.625 V, which is mainly attributed to the abundant porous structure, the rich structural defects formed by doping Se atoms, and the strong synergistic effects between the CoFe alloys and graphitic carbon nanosheet. Furthermore, the ZAB fabricated by CoFe/Se@CN shows a high peak power density of 160 mW cm−2 and a large specific capacity of 802 mA h g−1 with favorable cycling stability, outperforming that of Pt/C+RuO2. Our study offers a plausible strategy to explore bifunctional carbon‐based materials with efficient electrocatalytic properties for rechargeable ZABs.
Hydrothermal carbonization of sawdust for hydrochar production to prepare solid fuels
Authors: Lilian Milad Ja , Shui Tao , Rajput Himadri , Naterer Greg , He Sophia , Hu Yulin 
Published: October 2023

AbstractHydrothermal carbonization (HTC) of sawdust for producing hydrochar was optimized using response surface methodology (RSM). After optimization, the combustion behaviour and other relevant fuel properties of hydrochar that was obtained at the optimized conditions were studied. Additionally, the aqueous phase obtained at the optimized conditions was recycled as the reaction medium for producing hydrochar and the influence of the aqueous phase recycling on the hydrochar yield and properties was evaluated. The results indicated that the highest hydrochar yield of 84.23 wt.% under the predicted optimum conditions of temperature of 162.23°C, 2.51 h, feedstock loading of 10.71 wt.%, and catalyst loading of 7.99 wt.%. Furthermore, it was found that the use of recycled aqueous phase as the reaction medium led to an increase in the hydrochar yield, higher heating value (HHV), and energy yield, and difference in combustion behaviour was minor. Overall, this study filled the gap in HTC literature regarding the effect of catalyst on hydrochar production and provided a practical solution to treat the aqueous phase.