bluuebunny/crossref_metadata_2025_split huggingface dataset:
Recent Advances on Catalytic Atroposelective Synthesis of Planar‐Chiral Macrocycles
Authors: Yang Gongming , Wang Jian 
Published: August 2024

AbstractPlanar‐chiral skeletons widely exist in natural products, bioactive compounds, and other functional molecules. Although significant progress has been made in the field of asymmetric synthesis of centrally or axially chiral molecules over the past years, enantioselective constructing of planar chirality is still a big obstacle and numerous efforts have been made in this field. Previous works have mainly focused on the assembly of planar‐chiral [2,2]‐paracyclophanes and metallocenes. This Minireview describes recent advancements in asymmetric catalytic synthesis of planar‐chiral macrocycles, including ansa chain construction, plane formation and asymmetric transformation strategies. It is anticipated that this Minireview will sever as a source of inspiration for developing new unconventional procedures for access to planar‐chiral skeletons.
In Situ Electrochemical Interfacial Polymerization for Covalent Organic Frameworks with Tunable Electrochromism
Authors: Wang Ying‐Ao , Wu Qiong , Wang Xun , Jiang Min , Zhang Rui , Chen Xiao‐Juan , Liang Ru‐Ping , Qiu Jian‐Ding 
Published: August 2024

AbstractA rapid in situ synthesis of electrochromic covalent organic frameworks (EC‐COFs) was proposed by using green electrochemical interface polymerization of N,N,N’,N’‐tetrakis(4‐aminophenyl)‐1,4‐benzenediamine (TPDA) and 2,5‐dihydroxyterephthalaldehyde (DHBD). The synthetized TPDA‐DHBD films exhibit stable polymorphic color variations under different applied potentials, which can be attributed to the redox state changes of bis(triphenylamine) and imine electroactive functional groups within the COFs skeleton. TPDA‐DHBD represents markedly different electrochromisms from red to cyan due to the steric hindrance effect caused by the presence of UO22+, demonstrating the unique tunability of COFs materials. This work offers a new feasible idea for rapid EC‐COFs synthesis and tunable EC‐COFs realization.
Reaction of β‐Ketoester and 1,3‐Diol to Access Chemically Recyclable and Mechanically Robust Poly(vinyl alcohol) Thermosets through Incorporation of β‐(1,3‐dioxane)ester
Authors: Ma Youwei , Zheng Chihui , Slor Gadi , Özkan Melis , Gubelmann Oliviero Julien , Stellacci Francesco 
Published: August 2024

AbstractThe development of mechanically robust, chemically stable, and yet recyclable polymers represents an essential undertaking in the context of advancing a circular economy for plastics. Here, we introduce a novel cleavable β‐(1,3‐dioxane)ester (DXE) linkage, synthesized through the catalyst‐free reaction of β‐ketoester and 1,3‐diol, to cross‐link poly(vinyl alcohol) (PVA) for the formation of high‐performance thermosets with inherent chemical recyclability. PVA, modified with β‐ketoester groups through the transesterification reaction with excess tert‐butyl acetoacetate, undergoes cross‐linking reactions with the unmodified 1,3‐diols within PVA itself upon thermal treatment. The cross‐linking architecture improves PVA’s mechanical properties, with Young's modulus and toughness that can reach up to 656 MPa and 84 MJ cm−3, i.e. approximately 3‐ and 12‐fold those of linear PVA, respectively. Thermal treatment of the cross‐linked PVA polymers under acid conditions leads to deconstruction of the networks, enabling the excellent recovery (>90 %) of PVA. In the absence of either thermal or acidic treatment, the cross‐linked PVA maintains its dimensional stability. We show that the recovery of PVA is also possible when the treatment is performed in the presence of other plastics commonly found in recycling mixtures. Furthermore, PVA‐based composites comprising carbon fibers and activated charcoal cross‐linked by the DXE linkages are also shown to be recyclable with recovery of the PVA and the fillers.
Abnormal Gas Generation during First Discharge Process of Sodium Ion Battery
Authors: Deng Xin , Huang Yu , Han Yan , Du Jinqiao , Tian Jie , Li Yan , Yu Yifei , Shen Yue , Huang Yunhui 
Published: August 2024

AbstractIn recent years, sodium‐ion batteries (SIBs) have attracted a lot of attention and are considered an ideal alternative to lithium‐ion batteries (LIBs). The hard carbon (HC) anode in SIBs presents a unique challenge for studying the formation process of the solid electrolyte interphase (SEI) during initial cycling, owing to its distinctive porous structure. This study employs a combination of ultrasonic scanning techniques and differential electrochemical mass spectrometry to conduct an in‐depth analysis of the two‐dimensional distribution and composition of gases during the formation process. The findings reveal distinct gas evolution behaviors in SIBs compared to LIBs during formation. Notably, significant gas evolution is observed during the discharge phase of the formation cycle in SIBs, with higher discharge rates leading to increased gas evolution rates. This phenomenon is likely attributed to the adsorption of CO2 gas by the abundant pores in HC, followed by desorption during discharge. Furthermore, the study demonstrates that the addition of 5A molecular sieves, which competitively adsorb gases, effectively reduces gas adsorption on the anode during formation, thereby significantly enhancing battery performance. This research elucidates the gas adsorption and desorption behavior at the battery interface, providing new insights into the SEI formation process in SIBs.
Steering the Site Distance of Atomic Cu−Cu Pairs by First‐Shell Halogen Coordination Boosts CO2‐to‐C2 Selectivity
Authors: Ma Fengya , Zhang Pengfang , Zheng Xiaobo , Chen Liang , Li Yunrui , Zhuang Zechao , Fan Yameng , Jiang Peng , Zhao Hui , Zhang Jiawei , Dong Yuming , Zhu Yongfa , Wang Dingsheng , Wang Yao 
Published: August 2024

AbstractElectrocatalytic reduction of CO2 into C2 products of high economic value provides a promising strategy to realize resourceful CO2 utilization. Rational design and construct dual sites to realize the CO protonation and C−C coupling to unravel their structure‐performance correlation is of great significance in catalysing electrochemical CO2 reduction reactions. Herein, Cu−Cu dual sites with different site distance coordinated by halogen at the first‐shell are constructed and shows a higher intramolecular electron redispersion and coordination symmetry configurations. The long‐range Cu−Cu (Cu−I−Cu) dual sites show an enhanced Faraday efficiency of C2 products, up to 74.1 %, and excellent stability. In addition, the linear relationships that the long‐range Cu−Cu dual sites are accelerated to C2H4 generation and short‐range Cu−Cu (Cu−Cl−Cu) dual sites are beneficial for C2H5OH formation are disclosed. In situ electrochemical attenuated total reflection surface enhanced infrared absorption spectroscopy, in situ Raman and theoretical calculations manifest that long‐range Cu−Cu dual sites can weaken reaction energy barriers of CO hydrogenation and C−C coupling, as well as accelerating deoxygenation of *CH2CHO. This study uncovers the exploitation of site‐distance‐dependent electrochemical properties to steer the CO2 reduction pathway, as well as a potential generic tactic to target C2 synthesis by constructing the desired Cu−Cu dual sites.
Current research status and development trends in rolling oil sludge treatment
Authors: Ge Lichao , Mai Longhui , Li Qian , Rong Nai , Wang Yang , Yang Qingyuan , Song Hongda , Xu Chang 
Published: August 2024

AbstractRolling oil sludge (ROS) is a type of solid waste produced during steel rolling; this waste contains not only a high iron content but also many harmful organic components and is a very attractive secondary resource. This paper introduces the sources and hazards of ROS, summarizes the recycling methods integrated with steel production, classifies traditional treatment technologies, and analyzes their advantages and disadvantages. Combined treatment is the main direction of ROS treatment methods in the future. The ROS recycling techniques applied in different industries are summarized. Finally, existing problems and future work are described to promote the remediation and resource utilization of ROS.
Revealing flow structures in horizontal pipe and biomass combustor using computational fluid dynamics simulation
Authors: Steven Soen , Hernowo Pandit , Sasongko Nugroho A. , Soedarsono Adik A. , Wardani Maya L. D. , Otivriyanti Geby , Soekotjo Ernie S. A. , Hidayatullah Ibnu M. , Sophiana Intan C. , Culsum Neng T. U. , Fajri Imam M. , Pasymi Pasymi , Bindar Yazid 
Published: August 2024

AbstractComputational fluid dynamics (CFD) is a powerful tool to provide information on detailed turbulent flow in unit processes. For that reason, this study intends to reveal the flow structures in the horizontal pipe and biomass combustor. The simulation was aided by ANSYS Fluent employing standard
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model. The results show that a greater Reynolds number generates more turbulence. The pressure drop inside the pipe is also found steeper for small pipe diameters following Fanning's correlation. The fully developed flow for the laminar regime is found in locations where the ratio of entrance length to pipe diameter complies with Hagen–Poiseuille's rule. The sucking phenomenon in jet flow is also similar to the working principle of ejector. For the biomass combustor, the average combustion temperature is 356–696°C, and the maximum flame temperature is 1587–1697°C. Subsequently, air initially flows through the burner area and then moves to the outlet when enters the combustor chamber. Not so for particle flow, the particle experiences sedimentation in the burner area and then falls as it enters the combustor chamber. This study also convinces that secondary air supply can produce more circulating effects in the combustor.
Curing kinetics and mechanical properties of the epoxy vitrimer based on transesterification and its composite laminates
Authors: Chang Zhengping , Gao Yazhi , Yan Kanghe , Wang Zhongqi , Zhao Menglin , Zhao Yang 
Published: August 2024

AbstractThe resin is a fundamental factor in determining the performance and usage conditions of its composites. The epoxy vitrimer, which combines both thermoplastic and thermosetting properties, shows significant potential in extending the service life of material. The curing process significantly affects the macroscopic properties of the vitrimer and the resulting carbon fiber reinforced plastics (CFRP). Effective control of curing parameters constitutes the critical factor for the assurance of product quality. In the study, a differential scanning calorimetry (DSC) was utilized to establish a curing kinetics model for a modified, self‐healable epoxy vitrimer based on transesterification. Then the molecular structure, thermodynamic, and mechanical properties of the cured vitrimer were analyzed. Next vitrimeric CFRP (vCFRP) laminates were fabricated, and the tensile and bending properties of the vCFRP laminates were investigated. The results showed the curing process was obtained: 95°C/1 h + 150°C/2 h + 170°C/2 h. The thermodynamic and mechanical properties of cured vitrimer could meet practical requirements. The minimal differences observed in the stress–strain curves of the specimens indicated that the curing process was appropriately configured. The prepared laminates exhibited performance comparable to that of commercial thermosetting composites.
Roto‐Cyclization of 4‐Bromopicene in On‐Surface Synthesis
Authors: Pan Wun‐Chang , Arumugam Kowsalya , Yen Yu‐Hsiung , Tani Fumito , Goto Kenta , Okamoto Hideki , Tang Shu‐Jung , Hoffmann Germar 
Published: August 2024

AbstractProgress toward single‐molecule electronics relies on a thorough understanding of local physico‐chemical processes and development of synthetic routines for controlled hetero‐coupling. We demonstrate a structurally unexpected ring closure process for a homo‐coupled 4,4’‐bipicenyl, realized in on‐surface synthesis. An initial covalent C−C coupling of 4‐bromopicene locks at lower temperatures the position and geometrically shields part of 4,4’‐bipicenyl. Employing this effect of shielding might offer a path toward controlled stepwise hetero‐coupling. At higher temperatures, a thermally activated three‐dimensional rotation upon hydrogen dissociation, a dehydrogenative roto‐cyclization, lifts the surface‐dimensionality restriction, and leads to the formation of a perylene. Thereby, the shielded molecular part becomes accessible again.
Supramolecular J‐ and H‐Aggregation of Naphthalimide‐Conjugated Dipeptide in Mixed‐Solvent Systems and its Application in Cell Imaging
Authors: Kuila Soumen , Reddy Kolimi Prashanth , Dasgupta Shalini , Bera Abhijit , Mukherjee Moupriya , Pramanik Goutam , Datta Pallab , Nanda Jayanta 
Published: August 2024

AbstractIn this work, a core‐substituted NMI‐conjugated dipeptide (4MNLV) was extensively studied in mixed solvent systems to explore the polarity effect on the self‐assembly pattern and their photophysical property. 4MNLV adopted J‐ or H‐ type aggregation pattern depending upon the polarity index of the solvent system chosen. The self‐assembly process was achieved through the anti‐solvent effect. UV‐vis study suggested that if the stock solution of 4MNLV was diluted with a relatively more polar solvent (compared to the stock solvent), then the system acquired J‐ type of aggregation pattern by showing a red‐shift in their absorption maxima (λmax). Conversely, when the stock was diluted by a relatively less polar solvent, H‐type of aggregation was observed, where blue shift of λmax was noticed. The emission spectra and the lifetime of the self‐assembled materials were also influenced by the chosen solvent system. The chirotopic behaviour of these self‐assembled materials was studied through CD spectroscopy. Morphological study indicated the formation of helical nanofibrillar structures. The bright green fluorescence of these highly biocompatible naphthalimide‐peptide conjugate was used for cell imaging application, indicating its futuristic scope.
Modelling the Chinese crude oil futures returns through a skew‐geometric Brownian motion correlated with the market volatility index process for pricing financial options
Authors: Bufalo Michele , Fanelli Viviana 
Published: August 2024

AbstractIn this paper we model the dynamics of the Chinese crude oil futures returns by using a skew‐geometric Brownian motion correlated with the market volatility, which is taken as a square‐root stochastic process. We use the OVX index data as proxy for market volatility. We validate the proposed model in terms of accuracy of its calibrations through an in‐sample simulation. Instead, out‐of‐sample simulations are used to show that a correlated skew‐geometric Brownian motion is more appropriate for modelling the Chinese returns compared to a single skew‐geometric Brownian motion in terms of forecasts. Furthermore, we price an American call option on the Chinese futures by using a recursively scheme based on a closed‐form formula, and an alternative Monte Carlo approach, for the related European call option. We show that our call price estimates are very close to market values and our model generally outperforms many benchmarks in literature, such as the Barone‐Adesi and Whaley formula and its generalizations.
What do we know about autism and policing globally? Preliminary findings from an international effort to examine autism and the criminal justice system
Authors: Cooper Dylan , Frisbie Shelby , Wang Shufang , Ventimiglia Jonas , Gibbs Vicki , Love Abigail M. A. , Mogavero Melanie , Benevides Teal W. , Hyatt Jordan M. , Hooven Kate , Basketbill Icylee , Shea Lindsay 
Published: August 2024

AbstractResearch has demonstrated that autistic individuals have higher rates of police contact, however, research has seldom explored the fundamental reasons for these interactions and how this might vary across international contexts. To remedy this, the Global Autism and Criminal Justice Consortium created and disseminated the Global Criminal Justice Survey. Descriptive statistics of survey respondents with and without police contact were compared to glean differential characteristics. Frequency and type of recent police interactions (within the last 5 years) among autistic individuals were also examined to better contextualize the reasons that autistic individuals encounter police. Study findings indicated that across a global sample (i.e., North America, Scandinavia, Europe, and Oceania) nearly half of all autistic individuals had an interaction with police and that those with a history of police contact were usually older, had higher educational qualifications, and were more likely to have a co‐occurring mental health or developmental disorder. Among types of interactions, noncriminal encounters, such as welfare checks, traffic incidents, wandering, and behaviors associated with autism, were most common, followed by autistic individuals alleging a crime was committed against them. These findings offer important directions for future research and for targeted policy responses that can address the unique needs of autistic individuals within the justice system.
Teaching Turkish children to mand for information in the context of tact instruction
Authors: Koldas Meral , Sahin Serife , Lechago Sarah 
Published: August 2024

AbstractThis study explores the efficacy of mand for information (MFI) training in individuals with autism, with a particular focus on the extension of this training to non‐native English speakers and the promotion of generalization across various contexts. The “What is this?” MFI was taught to four native Turkish‐speaking participants under various establishing operations (EOs). Notably, these MFIs were effectively embedded within tact training trials and delivered in a language other than English, thereby extending the research on MFI to a different language. Furthermore, the generalization of the MFIs was observed as participants maintained their proficiency across individuals, settings, and novel stimuli. Social validity data confirmed the acceptability of MFI training among parents, highlighting its potential to enhance communication skills. Follow‐up assessments were conducted 4 weeks post‐training indicating maintenance of the MFIs.
Promising deep‐red emitting Cr3+‐doped SrAl12O19 phosphors for plant growth LEDs
Authors: Tam Tong Thi Hao , Quang Nguyen Van , Tu Nguyen , Trung Do Quang , Du Nguyen Van , Bach Ta Ngoc , Lien Nghiem Thi Ha , Duy Hung Nguyen , Tien Ha Le , Tran Manh Trung , Huy Pham Thanh 
Published: August 2024

AbstractRecently, deep‐red‐emitting phosphors that can be excited by ultraviolet (UV) and near‐ultraviolet (NUV) light have been extensively investigated for plant growth LED applications. However, due to the harmful effects of these high‐energy rays on plants, violet‐ or blue‐excited deep‐red‐emitting phosphors are considered a more appropriate solution. In this work, SrAl12O19:Cr3+ phosphors were synthesized using a simple solid‐state reaction, revealing a strikingly sharp deep‐red emission band centered at 694 nm and effective excitation by violet light. The optimal SrAl12O19:1.0%Cr3+ phosphor, annealed at 1500°C, exhibits an extended lifetime of 0.549 ms, an energy activation level of 0.239 eV, a good quantum efficiency (QE) of 36.2%, and superior color purity at 100%. Further, an LED prototype with a precise absorption spectrum for far‐red phytochrome (Pfr) has been demonstrated. These results indicate that the synthesized SrAl12O19:1.0%Cr3+ phosphors could be used as a promising deep‐red‐emitting phosphor for plant growth LED.
Reimagining entrepreneurship by utilizing venture dynamics in sharing economy: Evaluating the symbiosis of macro and micro factors for sustainable capital flows in developing markets
Authors: Amit Sajid , Levermore Roger , Kafy Abdulla Al 
Published: August 2024

AbstractVenture capital (VC) plays a vital role in fostering revolution and entrepreneurship in emerging economies. However, attracting VC investments remains a significant challenge for startups in these markets. This study investigates the macro and micro factors influencing VC attraction in the Bangladeshi startup ecosystem, employing a mixed‐methods approach. A systematic literature review was performed to recognize the key factors influencing VC attraction in emerging markets. Qualitative interviews with 20 stakeholders, including startup founders, investors, and policymakers, were undertaken to gain insights into the challenges and opportunities for VC attraction in Bangladesh. Quantitative analysis of secondary data on VC investments and startup characteristics was executed to examine the associations connecting the identified factors and VC investment amount. The findings reveal that government policies, human capital availability, and informal institutions are critical macro factors influencing VC attraction, while founder and team characteristics, business model and scalability, and traction and validation are key micro factors. The study contributes to the literature on VC in developing economies by providing a comprehensive examination of the interplay of institutional, human capital, cultural, and startup‐specific factors shaping VC investment decisions. The findings have important implications for policymakers, investors, and entrepreneurs seeking to foster a more vibrant and sustainable startup ecosystem in Bangladesh and beyond. The research underlines the need for a holistic approach to addressing the challenges and leveraging the opportunities for VC attraction in emerging markets.
Allium cepa as a Toxicogenetic Investigational Tool for Plant Extracts: A Systematic Review
Authors: Melo Erisson Cruz de , da Silva Pinheiro Randyson , Costa Bruno Sousa , Lima Rosália Maria Tôrres de , Dias Ana Carolina Soares , de Jesus Aguiar dos Santos Teresinha , Nascimento Maria Luisa Lima Barreto do , de Castro e Sousa João Marcelo , Islam Muhammad Torequl , de Carvalho Melo Cavalcante Ana Amélia , El‐Nashar Heba A. S. , El‐Shazly Mohamed , Oliveira Filho José Williams Gomes de 
Published: August 2024

AbstractToxicological studies are important to investigate the genotoxic effects of various substances. Allium cepa can be used as test model for this purpose. This review summarizes the scope and applications for this A. cepa test model. For this, an up‐to‐date (April 2023) literature search was made in the Science Direct, PubMed, and Web of Science databases to find published evidence on studies performed using A. cepa as a test model. Out of 3,748 studies, 74 fit the inclusion criteria. The results showed that the use of the test model A. cepa contributed considerably to measuring the toxicological potential of plant extracts, proving the efficacy of the test as a potent bioindicator of toxic effects. In addition, 27 studies used more than one test system to verify the toxicological potential of extracts and fractions. Studies have shown that the A. cepa model has the potential to replace other test systems that make use of animals and cell cultures, besides having other advantages such as low cost, ease of execution, and good conditions for the observation of chromosomes. In conclusion, the A. cepa test can be considered one of the potential biomonitoring systems in toxicological studies of crude extracts.