bluuebunny/crossref_metadata_2025_split huggingface dataset:
Construction of Polymers with Highly Dispersed Reactive Phases and Open Pores for Catalyzing the Efficient Synthesis of CO2 to α‐Methylene Cyclic Carbonates
Authors: Guo Xiaoxuan , Yang Zhixiu , Zhang Fenglei , Gao Lijing , Wei Ruiping , Xiao Guomin 
Published: April 2024

AbstractSelective capture of carbon dioxide as a C1 feedstock for the preparation of high‐value chemicals has been recognised as an important way to mitigate the crisis. In this work, a new heterogeneous catalyst, Cu@CP‐PII, was developed through the rational construction of an open‐pore organic skeleton, which is easy to synthesise and highly efficient. With the synergistic effect between the high CO2 affinity of the porous skeleton and the highly dispersed Cu(I) sites of the activated alkynes, it can be used for the efficient preparation of α‐methylene cyclic carbonates at ambient temperature and pressure. The structure and morphology were exhaustively characterised by Solid State 13C‐NMR, FT‐IR, XPS, TEM and N2 adsorption‐desorption tests, and this catalyst possessed a high surface area of 273.7 m2 ⋅ g−1 and uniformly dispersion of CuI. To test its catalytic activity, Cu@CP‐PII in an amount of only 0.4 mol% was used as a catalyst for the carboxylative cyclization reaction of propargylic alcohols with CO2, which resulted in substrate conversions up to 100 % and yields greater than 99 %. In addition, controlled experiments and mechanistic elucidation confirmed that anhydrous and low temperatures are necessary to achieve high selective control of the target product α‐methylene cyclic carbonates.
Photoinduced C(sp3)−H Bicyclopentylation Enabled by an Electron Donor–Acceptor Complex‐Mediated Chemoselective Three‐Component Radical Relay
Authors: Dang Xiaobo , Li Zhixuan , Shang Jinlong , Zhang Chenyang , Wang Chao , Xu Zhaoqing 
Published: April 2024

AbstractThe photoredox electron donor–acceptor (EDA) complex‐mediated radical coupling reaction has gained prominence in the field of organic synthesis, finding widespread application in two‐component coupling reactions. However, EDA complex‐promoted multi‐component reactions are not well developed with only a limited number of examples have been reported. Herein, we report a photoinduced and EDA complex‐promoted highly chemoselective three‐component radical arylalkylation of [1.1.1]propellane, which allows the direct functionalization of C(sp3)−H with bicyclo[1.1.1]pentanes (BCP)‐aryl groups under mild conditions. A variety of unnatural α‐amino acids, featuring structurally diversified 1,3‐disubstituted BCP moieties, were synthesized in a single‐step process. Notably, leveraging the high tension release of [1.1.1]propellane, the highly unstable transient aryl radical undergoes rapid conversion into a relatively stable tertiary alkyl transient radical, and consequently, the competing side‐reaction of two‐component coupling was entirely suppressed. The strategic use of this transient radical conversion approach would be useful for the design of diverse EDA complex‐mediated multi‐component reactions. It is noteworthy that the highly chemoselective late‐stage incorporation of the 1,3‐disubstituted BCP pharmacophores into peptides was achieved both in liquid‐phase and solid‐phase reactions. This advancement is anticipated to have significant application potential in the future development of peptide drugs.
Metal‐Free Atom Transfer Radical Polymerization to Prepare Recylable Micro‐Adjuvants for Dendritic Cell Vaccine
Authors: Zhang Hengyuan , Heng Xingyu , Yang He , Rao Yu , Yao Lihua , Zhu Zhichen , Chen Gaojian , Chen Hong 
Published: April 2024

AbstractIn the development of dendritic cell (DC) vaccines, the maturation of DCs is a critical stage. Adjuvants play a pivotal role in the maturation of DCs, with a major concern being to ensure both efficacy and safety. This study introduces an innovative approach that combines high efficacy with safety through the synthesis of micro‐adjuvants grafted with copolymers of 2‐(methacrylamido) glucopyranose (MAG) and methacryloxyethyl trimethyl ammonium chloride (DMC). The utilization of metal‐free surface‐initiated atom transfer radical polymerization enables the production of safe and recyclable adjuvants. These micrometer‐sized adjuvants surpass the optimal size range for cellular endocytosis, enabling the retrieval and reuse of them during the ex vivo maturation process, mitigating potential toxicity concerns associated with the endocytosis of non‐metabolized nanoparticles. Additionally, the adjuvants exhibit a “micro‐ligand‐mediated maturation enhancement” effect for DC maturation. This effect is influenced by the shape of the particle, as evidenced by the distinct promotion effects of rod‐like and spherical micro‐adjuvants with comparable sizes. Furthermore, the porous structure of the adjuvants enables them to function as cargo‐carrying “micro‐shuttles”, releasing antigens upon binding to DCs to facilitate efficient antigen delivery.
Effect of PCL chain length on rheological and mechanical properties of PCL‐PDMS‐PCL triblock copolymer films
Authors: Sachan Radha , Purwar Roli 
Published: April 2024

AbstractThe polycaprolactone‐polydimethylsiloxane‐polycaprolactone (PCL‐PDMS‐PCL) triblock copolymer films of variable PCL chain are analyzed for rheological characteristics in this paper. The dynamics of viscoelastic behavior of photocrosslinked films above their crystal melting temperature (Tcm) is measured using oscillatory shear rheology experiments. The frequency sweep tests are analyzed at 0.1% strain as obtained from linear viscoelastic region. Shear thinning is observed in the study of complex viscosity. It has been noted that viscosity rises with increase in crosslink density and decrease in with PCL chain length. Time‐dependent effect on the copolymer films has been analyzed by creep recovery behavior. The Burgers model is fitted in creep compliance data to analyze its viscoelastic and viscous region. An examination of structure recovery revealed that recovery increased as PCL chain length decreased. Tensile strength and percentage elongation are studied at ambient conditions with a universal testing machine, while storage modulus and tan δ are analyzed by a dynamic mechanical analyzer at varying temperatures.
A hybrid CAD/CAE/CAM project‐based laboratory framework integrating topology optimization and laser powder bed fusion for engineering education
Authors: Afify Mohammed , Moubachir Younes , Guennoun Zouhair , Hassar Jamila 
Published: April 2024

AbstractIn the era of Industry 4.0, laser‐based additive manufacturing (LBAM) has gained substantial momentum in the production of complex lightweight structures in several domains such as aerospace, civil, and biomedical engineering. The increasing demand for consistent and precise manufacturing processes has urged the manufacturing industry to consider the coupling of topology optimization (TO) and laser powder bed fusion (LPBF) in the design of sophisticatedly novel topologies that are unattainable through traditional processes. Notably, this union has demonstrated a highly efficient and productive capability toward the manufacturing industry. In line with this accelerated pace, engineering programs within universities exert significant effort to revise and update their engineering curriculum design to incorporate emerging manufacturing technologies providing students with skills that are aligned with the actual industrial context. In this article, a computer‐aided design (CAD)/computer‐aided engineering (CAE)/computer‐aided manufacturing (CAM) project‐based laboratory framework is proposed combining TO and LPBF exploiting a simulation‐based environment integrating CAD, CAE, and CAM. The structure of the proposed CAD/CAE/CAM design methodology is revisited to discern the added value of the newly developed framework and its particularity in assisting aerospace engineering students to meet industrial expectations. A new CAD/CAE/CAM project‐based laboratory framework has been developed integrating TO and LPBF using advanced engineering tools within the aerospace engineering education.
The future of metaverse adoption: A behavioral reasoning perspective with a text‐mining approach
Authors: Shukla Anuja , Mishra Anubhav , Rana Nripendra P. , Banerjee Sohom 
Published: April 2024

AbstractMetaverse is portrayed as the next significant technology innovation with an estimated market opportunity of US $800 billion. Metaverse offers numerous opportunities and an unmatchable user experience, yet its acceptance among the masses is still a long way off. Moreover, within 2 years of its existence and grandiose hype about a huge market potential, the current business sentiments are not so hopeful. Despite the positive and encouraging feedback, the reasons behind the limited success of the metaverse need scientific exploration. This study uses netnography to collect online data from 751 articles (news articles, expert opinions, perspectives, and blogs). Further, we use the text‐mining method of structural topic modeling to generate insights from the text data and perform a sentiment analysis. The identified topics are mapped and explained using the behavioral reasoning theory to highlight “reasons for” and “reasons against” metaverse adoption. The study's findings identify flexibility, brand experience, human centricity, and virtual retail experience as enablers of acceptance of the metaverse, while regulatory issues, usage barriers, financial investment, and skepticism act as barriers to adopting the metaverse. Further, social adventure and social influence were identified as enablers categorized under subjective norms. This study contributes to the scarce literature on metaverse adoption and offers actionable insights to marketers to craft marketing strategies to benefit from the metaverse.
Revealing the 1H‐NMR Profiling of Six Edible Mushrooms Consumed in the Northeastern Highlands of Puebla, Mexico
Authors: Pacheco‐Hernández Yesenia , Villa‐Ruano Nemesio , Lozoya‐Gloria Edmundo , de Jesús Terán‐Sánchez Estefania , Becerra‐Martínez Elvia 
Published: April 2024

AbstractThe 1H‐NMR metabolomics profiling of six edible mushrooms consumed in the northeastern highlands of Puebla, Mexico is presented. These fungi were morpho‐ and molecularly identified as Infundibulicybe squamulosa, Amanita jacksonii, Lepista nuda, Russula delica, Russula brevipes, and Lactarius indigo. The chemical profiling confirmed the presence of eight essential amino acids and their derivatives, six organic acids, six nucleosides, low amounts of reducing sugars, and valuable nutraceuticals such as betaine, carnitine, glycero‐3‐phosphocholine and O‐acetylcarnitine which were differentially determined and quantified in the six mushrooms by qNMR. Principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS‐DA) generated four different groups. Two of these groups were constituted by fungal species with phylogenic relationships whereas non‐phylogenetic related species were separated from each other. The potential use of 1H‐NMR metabolomics and chemometrics to group macromycetes and determine the nutritional and nutraceutical potential of these local foods is demonstrated.
Effects of PNA Sequence and Target Site Selection on Function of a 4.5S Non‐Coding RNA
Authors: Saini Snehlata , Goel Khushboo , Ghosh Sudipta , Das Anirban , Saraogi Ishu 
Published: April 2024

AbstractPeptide nucleic acid (PNA) based antisense strategy is a promising therapeutic approach to specifically inhibit target gene expression. However, unlike protein coding genes, identification of an ideal PNA binding site for non‐coding RNA is not straightforward. Here, we compare the inhibitory activities of PNA molecules that bind a non‐coding 4.5S RNA called SRP RNA, a key component of the bacterial signal recognition particle (SRP). A 9‐mer PNA (PNA9) complementary to the tetraloop region of the RNA was more potent in inhibiting its interaction with the SRP protein, compared to an 8‐mer PNA (PNA8) targeting a stem‐loop. PNA9, which contained a homo‐pyrimidine sequence could form a triplex with the complementary stretch of RNA in vitro as confirmed using a fluorescent derivative of PNA9 (F‐PNA13). The RNA‐PNA complex formation resulted in inhibition of SRP function with PNA9 and F‐PNA13, but not PNA8 highlighting the importance of target site selection. Surprisingly, F‐PNA13 which was more potent in inhibiting SRP function in vitro, showed weaker antibacterial activity compared to PNA9 likely due to poor cell penetration of the longer PNA. Our results underscore the importance of suitable target site selection and optimum PNA length to develop better antisense molecules against non‐coding RNA.
Advances in the Homogeneously Catalyzed Hydrogen Production from Biomass Derived Feedstocks: A Review
Authors: Fasolini Andrea , Martelli Giulia , Piazzi Andrea , Curcio Massimiliano , De Maron Jacopo , Basile Francesco , Mazzoni Rita 
Published: April 2024

AbstractBiomass–derived feedstocks for hydrogen production are crucial as an alternative to fossil fuel especially in those areas where green electricity and clean water are scarce. In this framework the transformation of simple (formic acid, alcohols) and more complex (polyalcohols, sugars and cellulose) bio–derivatives in pure hydrogen is recognized as a promising approach. Parallel to great effort in heterogeneous catalysis, milder molecular systems represent a more selective eye for alternative solutions and mechanistic insights. In the present review the introduction summarizes the challenges in the catalytic utilization of biomass–derived feedstocks, followed by the advances in homogeneously catalyzed hydrogen production from different substrates which will cover formic acid, with oustanding efficiency with noble metals and promising results with earth abundant ones and alcohols and polyalcohols, with particular emphasis to the development of heterogenized systems, ligand assisted catalysts and bi‐catalytic synergistic solutions which allow to avoid base and to promote catalyst stability and recyclability. In the last part, description of hydrogen production from more complex substrates, such as sugars and cellulose, will show the role of molecular complexes in main and side reactions. Critical comments on the reported advances are provided along the whole discussion.
Linear, Planar, Orbicular, and Macrocyclic Multinuclear Zinc (Meth)acrylate Complexes
Authors: Iwasaki Takanori , Suehisa Gaito , Tadaoka Hiroshi , Shiga Kazuyoshi , Nozaki Kyoko 
Published: April 2024

AbstractZinc carboxylate complexes are widely utilized as artificial models of metalloenzymes and as secondary building units of PCPs/MOFs. However, the relationship between the structure of the monodentate carboxylato ligand and the molecular arrangement of multinuclear zinc carboxylate complexes is not fully understood because of the coordination flexibility of the Zn ion and carboxylato ligands. Herein, we report the structural analysis of a series of complexes derived from zinc (meth)acrylate which has a linear infinite chain structure. The molecular structure of μ4‐oxido‐bridged tetranuclear complexes [Zn4(μ4‐O)(OCOR)6] revealed a distorted Zn4O core. Crystallization of zinc acrylate under aqueous conditions afforded a μ3‐hydroxido‐containing pentanuclear complex [Zn5(μ3‐OH)2(OCOR)8] as the repeating unit of an infinite sheet‐like structure in the solid state. It was also obtained by the hydrolysis of the μ4‐oxido‐bridged tetranuclear complex. In sharp contrast, the methacrylate analog retained the methacrylato ligands under aqueous crystallization conditions to form a macrocyclic dodecanuclear complex with methacrylato as the sole ligand.
The Heptazine‐Based Materials through Intrinsically Modification for the Cycloaddition of CO2 and Bisepoxides
Authors: Liang Hongguang , Li Xiaoyun , Wang Junwei , Li Qifeng , Feng Yuelan , Kang Maoqing , Zhang Yingan 
Published: April 2024

AbstractFor the efficient utilization of CO2 into valuable product, the attractive carbon nitride catalysts have been widely studied. In this work, heptazine‐related materials with varying degree of polymerization were designed by an intrinsically modification strategy and employed in the cycloaddition of CO2 with the bisepoxide 1, 4‐butanediol diglycidyl ether (BDODGE). We initially figured out that the sample prepared at 450 °C contained more melem hydrate, exhibiting the best performance. The epoxides conversion and corresponding cyclic carbonates selectivity could achieve 93.1 % and 99.3 % at 140 °C for 20 h without any cocatalyst and solvent, respectively. Results of the catalytic tests suggested that the high catalytic activity was dependent on big size porous structure and the synergetic effect of active amino groups and −OH groups. The role of water in maintaining the specific structure and providing active site has been proved. Moreover, the CN‐450‐W catalyst exhibited outstanding recycling stability. And finally, a plausible reaction mechanism was proposed.
Fluorescent BF2 Complexes Inspired by Ageladine A
Authors: Tolle Christian , Fresia Marvin , Jones Peter G. , Lindel Thomas 
Published: April 2024

AbstractThe pH‐dependent UV/Vis absorption and fluorescence of several analogs of the marine natural product ageladine A were investigated. Besides ageladine A itself, its BF2 complex and the corresponding debrominated analogs were included, as were the chloro analog of the debromoageladine‐BF2 complex, an imidazolone analog, and a triazole derivative, which lack the free amino group. Importantly, the pH‐dependence of the fluorescence of the chloro analog closely resembles that of the natural product ageladine A, but with about 25‐fold higher fluorescence intensity and a maximum between pH 3 and 6. The imidazolone derivative behaves in a complementary manner and shows fluorescence only above pH 6, but with less intensity than ageladine A. The calculated Stokes shifts agree well with the experiment, which underlines the accuracy of the DFT calculation method (ωB97XD/TApr‐cc‐pVDZ, PCM). The conformational fixation of arylated imidazo[4,5‐c]pyridines by BF2 units seems to be promising with regard to the development of novel, pH‐dependent fluorescent probes.
Trick or treat? A bibliometric literature review of corporate social responsibility and earnings management
Authors: Deng Yang , Ong Tze San , Senik Rosmila 
Published: April 2024

AbstractResearch QuestionThis study seeks to examine and synthesize the extant literature to summarize whether the essence of corporate social responsibility (CSR) genuinely stems from an authentic social commitment, or if it primarily serves as a tactic to obscure earnings management (EM) practices.Research MethodologyA systematic literature review methodology is employed to thoroughly assess 75 articles selected from the Web of Science and Scopus databases, integrating bibliometric techniques, and following the Preferred Reporting Items for Systematic Reviews and Meta‐Analyses (PRISMA) guidelines.Research FindingsAmid evolving economic and social landscapes, the research of the CSR‐EM relationship increases, particularly in Asian contexts. Further research found that ESG (environmental, social, and governance) was gradually introduced into the theoretical framework of CSR‐EM. However, most of the research does not study the impact of the three dimensions of ESG, respectively. The study concludes the four varied CSR‐EM relationships: positive, negative, mixed (depending on EM type), and no correlation, and suggests that this should be determined by both macro (e.g., political and economic environment) and micro determinants (e.g., industries and governance). Therefore, the CSR‐EM relationship cannot be simply generalized. At present, most studies study CSR as a whole, and some literature uses CSR disclosure and performance to measure CSR respectively. However, distinctions between CSR disclosure and performance, namely CSR decoupling, remain underexplored.Theoretical and Practical ImplicationsThis review synthesizes four key findings and summarizes seven relevant theories from existing literature, thus enriching the theoretical contributions of CSR‐EM research. It underscores the significance of both macro and micro factors on the CSR‐EM relationship, introduces the concept of CSR decoupling, and outlines directions for future studies. The review offers insights for policymakers on CSR‐EM dynamics and suggests strategies for companies to enhance CSR practices and reporting consistency.
How do firms react to capital market liberalization? Evidence from ESG reporting greenwashing
Authors: Liu Guangrui , Qian Hao , Shi Yong , Yuan Deli , Zhou Ming 
Published: April 2024

AbstractBased on catering theory, this study employs a difference‐in‐differences model to investigate the impact of capital market liberalization on environmental, social, and governance (ESG) reporting greenwashing using mainland Hong Kong Connection Programs as a quasinatural experiment. Our findings indicate that corporate management increasingly engages in ESG reporting greenwashing in capital market liberalization to cater to foreign investors. This conclusion remains valid after controlling for endogeneity. Mechanistic analysis indicates that investor sentiment increases with capital market liberalization. In response, corporate management intensifies ESG reporting greenwashing to cater to foreign investors, and analysts' focus does not serve as a supervisory mechanism for restraining ESG reports greenwashing. Heterogeneity tests demonstrate that ESG reports greenwashing within the capital market diminishes for mandatory disclosure and state‐owned firms. However, ESG reports greenwashing intensifies among firms facing high financing constraints amid capital market liberalization. Overall, we identify a significant catering effect on ESG reporting amid capital market liberalization, offering a novel theoretical framework on greenwashing in ESG disclosures.
The synergistic effect of corporate environmental responsibility and technological base on firm performance: From the perspective of knowledge recombination
Authors: Liang Zhou , Zhang Qi , Wu Weiwei , Liu Xi 
Published: April 2024

AbstractThe research constructs a theoretical framework including the relationship between the interaction of corporate environmental responsibility and technological base and firm performance and the mediating role of knowledge recombination. The research empirically studies the proposed framework by using the data of 258 firms listed on the Shanghai and Shenzhen Stock Exchanges from 2008 to 2019. The results show that the interaction between corporate environmental responsibility and technological base has a positive effect on firm performance and both the two dimensions of knowledge recombination that are knowledge recombination reuse and knowledge recombination creation could mediate this relationship. These results not only figure out the interaction between corporate environmental responsibility and technological base and its influencing mechanisms on firm performance, which is knowledge recombination and further broaden the application of the knowledge‐based view, but also provide important managerial implications for firms to acquire superior performance through corporate environmental responsibility and technological base.