bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cadmium‐Doped and Pincer Ligand‐Modified Gold Nanocluster for Catalytic KA2Reaction
Authors: Fan Ji‐Qiang , Yang Ying , Tao Cheng‐Bo , Li Man‐Bo 
Published: December 2022

AbstractA gold nanocluster Au17Cd2(PNP)2(SR)12(PNP=2,6‐bis(diphenylphosphinomethyl)pyridine, SR=4‐MeOPhS) consisting of an icosahedral Au13kernel, two Au2CdS6staple motifs, and two PNP pincer ligands has been designed, synthesized and well characterized. This cadmium and PNP pincer ligand co‐modified gold nanocluster showed high catalytic efficiency in the KA2reaction, featuring high TON, mild reaction conditions, broad substrate scope as well as catalyst recyclability. Comparison of the catalytic performance between Au17Cd2(PNP)2(SR)12and the structurally similar single cadmium (or PNP) modified gold nanoclusters demonstrates that the co‐existence of the cadmium and PNP on the surface is crucial for the high catalytic activity of the gold nanocluster. This work would be enlightening for developing efficient catalysts for cascade reactions and discovering the catalytic potential of metal nanoclusters in organic transformations.
Atomically Dispersed Zn‐Pyrrolic‐N4 Cathode Catalysts for Hydrogen Fuel Cells
Authors: Sun Panpan , Qiao Zelong , Wang Shitao , Li Danyang , Liu Xuerui , Zhang Qinghua , Zheng Lirong , Zhuang Zhongbin , Cao Dapeng 
Published: December 2022

AbstractTo achieve practical application of fuel cell, it is vital to develop highly efficient and durable Pt‐free catalysts. Herein, we prepare atomically dispersed ZnNC catalysts with Zn‐Pyrrolic‐N4 moieties and abundant mesoporous structure. The ZnNC‐based anion‐exchange membrane fuel cell (AEMFC) presents an ultrahigh peak power density of 1.63 and 0.83 W cm−2 in H2‐O2 and H2‐air (CO2‐free), and also exhibits long‐term stability with more than 120 and 100 h for H2‐air (CO2‐free) and H2‐O2, respectively. Density functional calculations further unveil that the Zn‐Pyrrolic‐N4 structure is the origin of high activity of as‐synthesized ZnNC catalyst, while the Zn‐Pyridinic‐N4 moiety is inactive for oxygen reduction reaction (ORR), which successfully explain the puzzle why most Zn‐metal‐organic framework ‐derived ZnNC catalysts in previous reports did not present good ORR activity because of their Zn‐Pyridinic‐N4 moieties. This work offers a new route for speeding up development of AEMFCs.
ZnF2‐Riched Inorganic/Organic Hybrid SEI: in situ‐Chemical Construction and Performance‐Improving Mechanism for Aqueous Zinc‐ion Batteries
Authors: Xie Dan , Sang Yuan , Wang Dan‐Hong , Diao Wan‐Yue , Tao Fang‐Yu , Liu Chang , Wang Jia‐Wei , Sun Hai‐Zhu , Zhang Jing‐Ping , Wu Xing‐Long 
Published: December 2022

AbstractUncontrolled dendrites growth and serious parasitic reactions in aqueous electrolytes, greatly hinder the practical application of aqueous zinc‐ion battery. On the basis of in situ‐chemical construction and performance‐improving mechanism, multifunctional fluoroethylene carbonate (FEC) is introduced into aqueous electrolyte to construct a high‐quality and ZnF2‐riched inorganic/organic hybrid SEI (ZHS) layer on Zn metal anode (ZMA) surface. Notably, FEC additive can regulate the solvated structure of Zn2+ to reduce H2O molecules reactivity. Additionally, the ZHS layer with strong Zn2+ affinity can avoid dendrites formation and hinder the direct contact between the electrolyte and anode. Therefore, the dendrites growth, Zn corrosion, and H2 evolution reaction on ZMA in FEC‐included ZnSO4 electrolyte are highly suppressed. Thus, ZMA in such electrolyte realize a long cycle life over 1000 h and deliver a stable coulombic efficiency of 99.1 % after 500 cycles.
Pore Geometry and Surface Engineering of Covalent Organic Frameworks for Anhydrous Proton Conduction
Authors: Hao Liqin , Jia Shuping , Qiao Xueling , Lin En , Yang Yi , Chen Yao , Cheng Peng , Zhang Zhenjie 
Published: December 2022

AbstractDeveloping new materials for anhydrous proton conduction under high‐temperature conditions is significant and challenging. Herein, we create a series of highly crystalline covalent organic frameworks (COFs) via a pore engineering approach. We simultaneously engineer the pore geometry (generating concave dodecagonal nanopores) and pore surface (installing multiple functional groups such as −C=N−, −OH, −N=N− and −CF3) to improve the utilization efficiency and host–guest interaction of proton carriers, hence benefiting the enhancement of anhydrous proton conduction. Upon loading with H3PO4, COFs can realize a proton conductivity of 2.33×10−2 S cm−1 under anhydrous conditions, among the highest values of all COF materials. These materials demonstrate good stability and maintain high proton conductivity over a wide temperature range (80–160 °C). This work paves a new way for designing COFs for anhydrous proton conduction applications, which shows great potential as high‐temperature proton exchange membranes.
Water‐Harvesting Metal–Organic Frameworks with Gigantic Al24Units and their Deconstruction into Molecular Clusters
Authors: Xu Huoshu , Wu Yichen , Yang Lingyi , Rao Yin , Wang Junyi , Peng Shuyin , Li Qiaowei 
Published: December 2022

AbstractIn contrast to the vast Al‐oxo molecular cluster chemistry, Al‐based building units for metal–organic framework (MOF) construction are limited in structural diversity and complexity. Synthesis of single crystalline MOFs based on this “hard” metal is further complicated by the poor reversibility of the Al‐organic coordination linkages. Here, a strategy to employ two kinds of linkages with distinct strength—strong Al‐carboxylate linkage and weak Cu‐pyrazol N linkage—gives FDM‐91 (FDM=Fudan Materials) with gigantic Al24‐based units. After replacing the weak moieties with organic linkers post‐synthetically, two new stable MOFs with exceptional water harvesting capacity (up to 0.53 g g−1) and outstanding cycling performance are developed. Linkage‐selective dissociation of FDM‐91 further leads to the isolation of the Al24molecular clusters. The versatile chemistry performed here to reinforce or deconstruct MOFs provides a new way to make important extended and discrete structures.
Electrochemical Synthesis of Pyrazolines and Pyrazoles via [3+2] Dipolar Cycloaddition
Authors: Linden Martin , Hofmann Silja , Herman Antonia , Ehler Nicole , Bär Robin M. , Waldvogel Siegfried R. 
Published: December 2022

AbstractPyrazolines and pyrazoles are common and important motifs of pharmaceutical agents and agrochemicals. Herein, the first electrochemical approach for their direct synthesis from easily accessible hydrazones and dipolarophiles up to decagram scale is presented. The application of a biphasic system (aqueous/organic) even allows for the conversion of highly sensitive alkenes, wherein inexpensive sodium iodide is employed in a dual role as supporting electrolyte and mediator. In addition, mechanistic insight into the reaction is given by the isolation of key step intermediates. The relevance of the presented reaction is underlined by the synthesis of commercial herbicide safener mefenpyr‐diethyl in good yields.
sn‐1 Specificity of Lysophosphatidylcholine Acyltransferase‐1 Revealed by a Mass Spectrometry‐Based Assay
Authors: Zhao Xue , Liang Jiaqi , Chen Ziye , Jian Ruijun , Qian Yao , Wang Yunfang , Guo Zhiying , Zhang Wenpeng , Zhang Ying , Yin Hang , Xia Yu 
Published: December 2022

AbstractLysophosphatidylcholine acyltransferase‐1 (LPCAT1) plays a critical role in the remodeling of phosphatidylcholines (PCs) in cellular lipidome. However, evidence is scarce regarding its sn‐selectivity, viz. the preference of assembling acyl‐Coenzyme A (CoA) at the C1 or C2‐hydroxyl on a glycerol backbone because of difficulty to quantify the thus‐formed PC sn‐isomers. We have established a multiplexed assay to measure both sn‐ and acyl‐chain selectivity of LPCAT1 toward a mixture of acyl‐CoAs by integrating isomer‐resolving tandem mass spectrometry. Our findings reveal that LPCAT1 shows exclusive sn‐1 specificity regardless of the identity of acyl‐CoAs. We further confirm that elevated PC 18 : 1/16:0 relative to its sn‐isomer results from an increased expression of LPCAT1 in human hepatocellular carcinoma (HCC) tissue as compared to normal liver tissue. MS imaging via desorption electrospray ionization of PC 18 : 1/16:0 thus enables visualization of HCC margins in human liver tissue at a molecular level.
Overall Carbon‐neutral Electrochemical Reduction of CO2 in Molten Salts using a Liquid Metal Sn Cathode
Authors: Jing Shuangxi , Sheng Ren , Liang Xinxin , Gu Dong , Peng Yuhao , Xiao Juanxiu , Shen Yijun , Hu Di , Xiao Wei 
Published: December 2022

AbstractAn overall carbon‐neutral CO2 electroreduction requires enhanced conversion efficiency and intensified functionality of CO2‐derived products to balance the carbon footprint from CO2 electroreduction against fixed CO2. A liquid Sn cathode is herein introduced into electrochemical reduction of CO2 in molten salts to fabricate core–shell Sn−C spheres (Sn@C). An in situ generated Li2SnO3/C directs a self‐template formation of Sn@C. Benefitting from the accelerated reaction kinetics from the liquid Sn cathode and the core–shell structure of Sn@C, a CO2‐fixation current efficiency higher than 84 % and a high reversible lithium‐storage capacity of Sn@C are achieved. The versatility of this strategy is demonstrated by other low melting point metals, such as Zn and Bi. This process integrates energy‐efficient CO2 conversion and template‐free fabrication of value‐added metal‐carbon, achieving an overall carbon‐neutral electrochemical reduction of CO2.
Amphiphilic drug slow release microspheres fabricated using polyvinyl alcohol, 10‐Undecen‐1‐ol, and multi‐walled carbon nanotubes
Authors: Tian Pan , Liu Wanjing , Yang Shengdu , Zhang Junhua 
Published: December 2022

AbstractIn this paper, novel embolic microspheres with efficient drug delivery and slow drug release properties were developed, which have potential applications in transarterial chemoembolization (TACE). The microspheres were prepared by suspension polymerization using vinyl acetate, 10‐Undecen‐1‐ol (UO), multi‐walled carbon nanotubes, and crosslinking agent (1,4‐butanediol divinyl ether). In the process, porous titanium tubes are used to control the particle size of the microspheres. In addition, the introduction of long‐chain (UO) makes the microsphere good swelling property in acetone. Multi‐walled carbon nanotubes modified by hexadecyltrimethoxysilane (HDTMS) are helpful for increasing both spherical morphology stabilization and swelling properties in acetone as well (C‐PVA‐2UO/CNT). Target drug was dissolved in acetone and the mcirospheres were dispersed in acetone to realize drug load. In vitro biocompatibility analysis showed that C‐PVA‐2UO/CNT is non‐cytotoxic and hemocompatible. The sustained drug release properties of C‐PVA‐2UO/CNT were confirmed by drug indomethacin (IMC) loading and release experiments. These findings suggest that the newly developed C‐PVA‐2UO/CNT has great potential to be used as a drug‐loaded embolization agent.
BTX production by breaking down lignin: Current status and future prospects
Authors: Ramirez Brenes Ricardo G , Alhadeff Eliana M. , Bojorge Ninoska , Trales Luiz E. M. , Pazos Gabrielle A. D. 
Published: December 2022

AbstractNowadays, lignin is a byproduct of the agricultural and cellulose pulp mill. Lignin is a sustainable, renewable raw material alternative to petroleum‐based chemicals, mainly for the benzene–toluene–xylene (BTX) production of commodities and the sequential secondary, tertiary and manufactured products in the petrochemical industry. It can be mass produced and is used for renewable energy biorefinery or high‐value‐added products. This review aims to outline the important lignin depolymerization technologies and the feasibility of imposing these transforming technologies on a large scale. Finally, this review examines the market prospects for BTX, revealing its R&D progress. However, the harmful effects of BTX and unfavorable conditions resulting from the COVID‐19 pandemic comprise roadblocks to its growth. However, the increasing use of biobased BTX is expected to open new market opportunities. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.
Brazilian agricultural and livestock substrates used in co‐digestion for energy purposes: Composition analysis and valuation aspects
Authors: Mendes Fabrício Bruno , Lima Brenno Vinicius de Medeiros , Volpi Maria Paula Cardeal , Albarracin Lorena Torres , Lamparelli Rubens Augusto Camargo , Moraes Bruna de Souza 
Published: December 2022

AbstractBrazil's agriculture and livestock annually generates enormous amounts of biomass, which varies in its biochemical composition. Many studies have pointed out the benefits of using this biomass as a substrate for biogas production through anaerobic digestion (AD), mostly via the co‐digestion (co‐AD) pathway. The agriculture and livestock of southeastern Brazil – sugarcane, orange, corn, soybean, coffee, cattle, swine, and poultry – have together demonstrated their potential for producing biomass that can be used for maximizing methane production. Filter cake, vinasse, straws, bagasse, mucilage, pulp, washing water, thin stillage, and manures also have specific organic matter and nutrient content that can be evaluated from an economic perspective as co‐products of biorefineries. Some are costless but others have acquisition costs in the agricultural market. Comparing the recent biochemical compositions cited in scientific literature (technical parameter) and to know the costs (valuation parameter) is crucial for farmers and investors make decisions in large‐scale. This study conducted a bibliographical survey of biomass generated in Brazilian agroindustry as a co‐substrate for energy production. The analysis summarized two tables: 1‐ a compilation of biochemical composition of the main co‐substrates, and 2‐ the acquisition or opportunity costs, discussing innovative aspects in the context of biogas production. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.
Solubility, Extraction, and Nanoparticles Production in Supercritical Carbon Dioxide: A Mini‐Review
Authors: Sodeifian Gholamhossein , Usefi Mohammad Mahdi Behvand 
Published: December 2022

AbstractSupercritical carbon dioxide (SC‐CO2) is CO2 that is stored beyond its critical point of 7.4 MPa and 31.1 °C. Given the request for consumption of a green solvent for the environment, SC‐CO2 is widely utilized in chemical, food, and pharmaceutical industries. To design material and drug production processes using supercritical fluid (SCF) technology, knowledge of their solubility is important. Temperature and pressure are the main factors in the study of solubility. Solubility data are then evaluated using equation of state, semi‐empirical, and intelligence models to establish suitable correlations. SC‐CO2 is one of the most important materials used in SCFs to study solubility. Another application of SC‐CO2 is in the field of material extraction to reduce the consumption of organic solvents. Nanoparticles production in drug industry is another advantage of SC‐CO2. Micro and nanoparticles can be produced using SCF techniques. In this review, the applications of SC‐CO2 in drug solubility, extraction of valuable materials, and nanoparticles production for pharmaceutical processes are reported and discussed. Finally, the main challenges are explained.
Minimalist transcatheter aortic valve replacement misses paravalvular regurgitation: Incidence and echocardiographic distribution of missed paravalvular regurgitation
Authors: Zaid Syed , Haniyeh Ahmed Abu , Rosenzveig Akiva , Malik Aaqib , Goldberg Joshua B. , Undemir Cenap , Spevack Daniel , Lansman Steven L. , Tang Gilbert H. L. , Ahmad Hasan 
Published: December 2022

AbstractBackgroundParavalvular regurgitation (PVR) may be missed intraoperatively with transthoracic echocardiography (TTE) guided minimalist TAVR. We sought to determine the incidence and echocardiographic distribution of PVR missed on intra‐op TTE, but detected on predischarge TTE.MethodsFrom July 2015 to 2020, 475 patients with symptomatic severe native aortic stenosis underwent TTE‐guided minimalist TAVR. Missed PVR was defined as predischarge PVR that was ≥1 grade higher than the corresponding intra‐op PVR severity. PVR was classified as anterior or posterior on the four standard TTE views; parasternal short‐axis (PSAX), parasternal long‐axis (PLAX), apical 3‐chamber (A3C), and 5‐chamber (A5C). Location‐specific risk of missed PVR was then determined.ResultsMild or greater PVR was seen in 55 (11.5%) cases intra‐op and 91 (19.1%) at predischarge, with no severe PVR. Among the 91 patients with ≥mild predischarge PVR, missed PVR was present in 42 (46.2%). Compared to the corresponding anterior jets, missed PVR rate was significantly higher for posterior jets in PLAX (62.5% vs. 25.0%, p = 0.005), A5C (56.9% vs. 25.0%, p = 0.009), PSAX (66.7% vs. 24.3%, 0.001), but not A3C (58.5% vs. 40.0%, p = 0.28).ConclusionsIntraoperative TTE‐guided minimalist TAVR either misses nearly half of ≥mild PVR or underestimates PVR by ≥1 grade when compared to predischarge TTE. Posterior PVR jets are more likely to be missed. Transesophageal echo guidance may help minimize missing PVR. Further studies are warranted.
Radial and ulnar approach for carotid artery stenting with Roadsaver™ double layer micromesh stent: Early and long‐term follow‐up
Authors: Petkoska Danica , Zafirovska Biljana , Vasilev Ivan , Novotni Gabriela , Bertrand Olivier F. , Kedev Sasko 
Published: December 2022

AbstractAimsWe aimed to evaluate the feasibility and safety of carotid artery stenting (CAS) with a newly designed double‐layer micromesh stent using wrist approach in patients with significant carotid disease.Materials and MethodsBetween January 2016 and December 2021, 105 patients undergoing CAS with Roadsaver™ stent were enrolled in a single center prospective study. Follow‐up assessments included neurological exams, duplex ultrasound (DUS), and 12‐lead ECG. The primary endpoint was the 30‐day composite rate of stroke, death, and myocardial infarction. Secondary endpoints included procedure success, access site complications, device success, target lesion revascularization, and in‐stent restenosis evaluated with DUS. Long‐term outcomes up to 72 months of follow‐up were assessed in all eligible patients.ResultsThe study population was predominantly male (69.5%) with a median age of 68 ± 8 years. Patients were symptomatic in 80% of the cases, and 35% fulfilled the high‐risk criteria for surgical endarterectomy. The right internal carotid artery was the target artery in 56 (53.4%), and the left in 49 (46.6%) of the cases. All procedures were successfully completed from the right wrist, with right radial access in 94 (89.5%) cases and ulnar artery access with previous radial artery occlusion in 11 (10.5%) cases. All patients were treated successfully with the study device. The primary endpoint was met with a 30‐day major adverse event rate of 0.9% (1/105). Up to 72 months of follow‐up (median 30 ± 20 months) there were no strokes, neurological deaths, or target lesion revascularization of the treated lesion. Doppler ultrasound examination revealed nonsignificant in‐stent restenosis in two asymptomatic patients. There was no hand ischemia detected in any patient.ConclusionResults from this study demonstrate the radial and ulnar access for CAS with double layer micromesh Roadsaver™ stent is safe and feasible and associated with favorable early and long‐term follow‐up.
Electronic Tuning of Iminotriphenolate Ligands for Titanium(IV)‐catalyzed Ring‐opening Copolymerization of Cyclic Anhydrides and Epoxides
Authors: Jeong Yeolib , Cho Min Ki , Seo Sanghyup , Cho Heyjin , Son Kyung‐sun , Kim Hyunwoo 
Published: December 2022

AbstractAlternating ring‐opening copolymerization (ROCOP) is a versatile synthetic method for preparing polyesters using relatively inexpensive and readily available monomers, epoxides and cyclic anhydrides. In this study, a new type of titanium (IV) complex coordinated with iminophenolate ligands was developed as an efficient catalyst for alternating ROCOP. As found in the crystal structures, iminophenolate titanium (IV) complexes exhibited octahedral geometries owing to geometrical constraints. Electronic tuning of iminophenolate ligands revealed that chloro‐substituted ligands are more efficient than other ligands with electron‐withdrawing or electron‐donating ligands. Density functional theory computation provided reaction profiles where octahedral intermediates and transition states were stabilized, and the chlorine substituent was the most efficient in stabilizing the transition state for the epoxide opening step.
Adsorption Capacities of Ammonia‐Activated Carbon Pairs in a Single‐Bed Adsorption Cooling System
Authors: Chaudhari Vikas H. , Desai Avinash D. , Bari Mahendra L. , Deshpande Tushar D. 
Published: December 2022

AbstractIn this study, the adsorption capacities of activated charcoal‐ammonia working pairs at room temperature, at which waste heat is supplied, were studied in a tube‐in‐tube adsorption bed in the pressure range of 0.4–10 bar. A double‐pipe adsorption bed was designed, constructed, and utilized for sequential adsorption and desorption of ammonia at 27 °C. Three types of granular activated carbons (GACs) with different particle size distributions were used as adsorbents. Experimental observations showed that the highest adsorption capacity for ammonia was shown by GAC‐2 with broader particle size distribution. The adsorption behaviors of all three adsorbents closely followed the Langmuir model under the operating conditions used in the study.
Biomineralized Piezoelectrically Active Scaffolds for Inducing Osteogenic Differentiation
Authors: Ma Zequn , Hu Xiantong , Zhang Yi , Li Xiangming , Chen Bo , An Qi , Zhao Yantao , Zhang Yihe 
Published: December 2022

AbstractThere is an endogenous electric field in living organisms, which plays a vital role in the development and regeneration of bone tissue. Therefore, self‐powered piezoelectric material for bone repair has become hot research in recent years. However, the current piezoelectric materials for tissue regeneration still have the shortcomings of lack of biological activity and three‐dimensional structure. Here, we proposed a three‐dimensional polyurethane foam (PUF) scaffold coated with piezoelectric poly (vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) and modified by a calcium phosphate (CaP) mineralized coating. The preferred scaffold has an open circuit voltage and short circuit current output of 5 V and 200 nA. Combining the physical and chemical properties of the CaP coating, the piezoelectric signal of PVDF‐HFP and the three‐dimensional structure of PUF, the scaffold exhibits superior promotion of cell osteogenic differentiation and ectopic bone formation in vivo. The mechanism is attributed to an increase in intracellular Ca2+ levels in response to chemical and piezoelectric stimulation with the material. This research not only paves the way for the application of piezoelectric scaffolds to stimulate osteoblasts differentiation in situ, but also lays the foundation for the clinical treatment of long‐term osteoporosis.