bluuebunny/crossref_metadata_2025_split huggingface dataset:
Giant Superlinear Power Dependence of Photocurrent Based on Layered Ta2NiS5 Photodetector
Authors: Meng Xianghao , Du Yuhan , Wu Wenbin , Joseph Nesta Benno , Deng Xing , Wang Jinjin , Ma Jianwen , Shi Zeping , Liu Binglin , Ma Yuanji , Yue Fangyu , Zhong Ni , Xiang Ping‐Hua , Zhang Cheng , Duan Chun‐Gang , Narayan Awadhesh , Sun Zhenrong , Chu Junhao , Yuan Xiang 
Published: April 2023

AbstractPhotodetector based on two‐dimensional (2D) materials is an ongoing quest in optoelectronics. 2D photodetectors are generally efficient at low illuminating power but suffer severe recombination processes at high power, which results in the sublinear power‐dependent photoresponse and lower optoelectronic efficiency. The desirable superlinear photocurrent is mostly achieved by sophisticated 2D heterostructures or device arrays, while 2D materials rarely show intrinsic superlinear photoresponse. This work reports the giant superlinear power dependence of photocurrent based on multilayer Ta2NiS5. While the fabricated photodetector exhibits good sensitivity (3.1 mS W−1per □) and fast photoresponse (31 µs), the bias‐, polarization‐, and spatial‐resolved measurements point to an intrinsic photoconductive mechanism. By increasing the incident power density from 1.5 to 200 µW µm−2, the photocurrent power dependence varies from sublinear to superlinear. At higher illuminating conditions, prominent superlinearity is observed with a giant power exponent of γ = 1.5. The unusual photoresponse can be explained by a two‐recombination‐center model where density of states of the recombination centers (RC) effectively closes all recombination channels. The photodetector is integrated into camera for taking photos with enhanced contrast due to superlinearity. This work provides an effective route to enable higher optoelectronic efficiency at extreme conditions.
Efficient Generation of Paired Single‐Cell Multiomics Profiles by Deep Learning
Authors: Lan Meng , Zhang Shixiong , Gao Lin 
Published: April 2023

AbstractRecent advances in single‐cell sequencing technology have made it possible to measure multiple paired omics simultaneously in a single cell such as cellular indexing of transcriptomes and epitopes by sequencing (CITE‐seq) and single‐nucleus chromatin accessibility and mRNA expression sequencing (SNARE‐seq). However, the widespread application of these single‐cell multiomics profiling technologies has been limited by their experimental complexity, noise in nature, and high cost. In addition, single‐omics sequencing technologies have generated tremendous and high‐quality single‐cell datasets but have yet to be fully utilized. Here, single‐cell multiomics generation (scMOG), a deep learning‐based framework to generate single‐cell assay for transposase‐accessible chromatin (ATAC) data in silico is developed from experimentally available single‐cell RNA‐seq measurements and vice versa. The results demonstrate that scMOG can accurately perform cross‐omics generation between RNA and ATAC, and generate paired multiomics data with biological meanings when one omics is experimentally unavailable and out of training datasets. The generated ATAC, either alone or in combination with measured RNA, exhibits equivalent or superior performance to that of the experimentally measured counterparts throughout multiple downstream analyses. scMOG is also applied to human lymphoma data, which proves to be more effective in identifying tumor samples than the experimentally measured ATAC data. Finally, the performance of scMOG is investigated in other omics such as proteomics and it still shows robust performance on surface protein generation.
THQ–Xanthene: An Emerging Strategy to Create Next‐Generation NIR‐I/II Fluorophores
Authors: Mao Zhiqiang , Rha Hyeonji , Kim Jungryun , You Xinru , Zhang Fan , Tao Wei , Kim Jong Seung 
Published: April 2023

AbstractNear‐infrared fluorescence imaging is vital for exploring the biological world. The short emissions (<650 nm) and small Stokes shifts (<30 nm) of current xanthene dyes obstruct their biological applications since a long time. Recently, a potent and universal THQ structural modification technique that shifts emission to the NIR‐I/II range and enables a substantial Stokes shift (>100 nm) for THQ‐modified xanthene dyes is established. Thus, a timely discussion of THQ–xanthene and its applications is extensive. Hence, the advent, working principles, development trajectory, and biological applications of THQ–xanthene dyes, especially in the fields of fluorescence probe‐based sensing and imaging, cancer theranostics, and super‐resolution imaging, are introduced. It is envisioned that the THQ modification tactic is a simple yet exceptional approach to upgrade the performance of conventional xanthene dyes. THQ–xanthene will advance the strides of xanthene‐based potentials in early fluorescent diagnosis of diseases, cancer theranostics, and imaging‐guided surgery.
Giant Resistive Switching and Lattice Modulation at Full Temperature Range in a Sr‐Doped Nickelate Oxide Transistor
Authors: Gao Xiaofei , Liu Junhua , Ji Yaoyao , Wei Long , Xiao Wen , Hu Shilin , Li Lin , Chen Kai , Liao Zhaoliang 
Published: April 2023

AbstractHow to promote the resistance switching ratio, enlarge the operating temperature range and accelerate the switching speed is at the forefront of ionic gating electronics. Usually, most attention has been paid to materials with metal‐to‐insulator transition (MIT), e.g., VO2 and SmNiO3. Here, Sr‐doped nickelate (Nd0.8Sr0.2NiO3) films which do not exhibit MIT are used for electric field control of H‐doping and to detect the variation of resistance, lattice, and electronic structures. The experimental results directly show a giant resistive switching by more than 105 at the full temperature range (2 K–300 K) and lattice modulation by 3.4%. More importantly, much faster switching speeds can be achieved in Nd0.8Sr0.2NiO3 devices than in nondoped NdNiO3 ones. Such high switching performance is demonstrated to arise from strongly suppressed Ni–O hybridization after H doping. The results of this study provide a new material paradigm for developing energy‐efficient neuromorphic computing. Further, the doping effect on device performance also suggests a novel approach to develop correlated perovskite oxide transistors in order to fulfill practical applications.
Organic near‐infrared photodetectors with photoconductivity‐enhanced performance
Authors: Zhang Siwei , Li Zhenlong , Li Jingzhou , Wang Bingzhe , Chen Fang , Li Xubiao , Liu Shunjie , Lam Jacky W. Y. , Xing Guichuan , Li Jiangyu , Zhao Zheng , Kang Feiyu , Wei Guodan , Tang Ben Zhong 
Published: April 2023

AbstractOrganic near‐infrared (NIR) photodetectors with essential applications in medical diagnostics, night vision, remote sensing, and optical communications have attracted intensive research interest. Compared with most conventional inorganic counterparts, organic semiconductors usually have higher absorption coefficients, and their thin active layer could be sufficient to absorb most incident light for effective photogeneration. However, due to the relatively poor charge mobility of organic materials, it remains challenging to inhibit the photogenerated exciton recombination and effectively extract carriers to their respective electrodes. Herein, this challenge was addressed by increasing matrix conductivities of a ternary active layer (D–A–D structure NIR absorber [2TT‐oC6B]:poly(N,N′‐bis‐4‐butylphenyl‐N,N′‐bisphenyl)benzidin [PolyTPD]:[6,6]‐phenyl‐C61‐butyric acid methyl ester [PCBM] = 1:1:1) upon in situ incident light illumination, significantly accelerating charge transport through percolated interpenetrating paths. The greatly enhanced photoconductivity under illumination is intrinsically related to the unique donor–acceptor molecular structures of PolyTPD and 2TT‐oC6B, whereas stable intermolecular interaction has been verified by systematic molecular dynamics simulation. In addition, an ultrafast charge transfer time of 0.56 ps from the NIR aggregation‐induced luminogens of 2TT‐oC6B absorber to PolyTPD and PCBM measured by femtosecond transient absorption spectroscopy is beneficial for effective exciton dissociation. The solution‐processed organic NIR photodetector exhibits a fast response time of 83 μs and a linear dynamic range value of 111 dB under illumination of 830 nm. Therefore, our work has opened up a pioneering window to enhance photoconductivity through in situ photoirradiation and benefit NIR photodetectors as well as other optoelectronic devices.
I3−/I− Redox Reaction‐mediated Organic Zinc‐Air Batteries with Accelerated Kinetics and Long Shelf Lives
Authors: Cui Mangwei , Ma Ninggui , Lei Hao , Liu Youfa , Ling Wei , Chen Sheng , Wang Jiaqi , Li Hongfei , Li Zhaohui , Fan Jun , Huang Yan 
Published: April 2023

AbstractThe storage time of Zn‐air batteries (ZABs) for practical implementation have been neglected long‐lastingly. ZABs based on organic solvents promise long shelf lives but suffer from sluggish kinetics. Here, we report a longly storable ZAB with accelerated kinetics mediated by I3−/I− redox. In the charge process, the electrooxidation of Zn5(OH)8Cl2⋅H2O is accelerated by I3− chemical oxidation. In the discharge process, I− adsorbed on the electrocatalyst changes the energy level of oxygen reduction reaction (ORR). Benefitting from these advantages, the prepared ZAB shows remarkably improved round‐trip efficiency (56.03 % vs. 30.97 % without the mediator), and long‐term cycling time (>2600 h) in ambient air without replacing any components or applying any protective treatment to Zn anode and electrocatalyst. After resting for 30 days without any protection, it can still directly discharge continuously for 32.5 h and charge/discharge very stably for 2200 h (440 cycles), which is evidently superior to aqueous ZABs (only 0/0.25 h, and 50/25 h (10/5 cycles) by mild/alkaline electrolyte replenishment). This study provides a strategy to solve both storage and sluggish kinetics issues that have been plaguing ZABs for centuries, opening up a new avenue to the industrial application of ZABs.
Free Amino Group Transfer via α‐Amination of Native Carbonyls
Authors: Feng Minghao , Fernandes Anthony J. , Sirvent Ana , Spinozzi Eleonora , Shaaban Saad , Maulide Nuno 
Published: April 2023

AbstractWe report herein a straightforward transfer of a free amino group (NH2) from a commercially available nitrogen source to unfunctionalized, native carbonyls (amides and ketones) resulting in direct α‐amination. Primary α‐amino carbonyls are readily produced under mild conditions, further enabling diverse in situ functionalization reactions—including peptide coupling and Pictet–Spengler cyclization—that capitalize on the presence of the unprotected primary amine.
Design of silica coated polyamide fabrics for thermo‐regulating textiles
Authors: Garzon Altamirano M. G. , Abebe M. G. , Lejeune J. , Cayla A. , Maes B. , Odent J. , Raquez J. M. , Campagne C. , Devaux E. 
Published: April 2023

AbstractEfficient thermal management is essential for the energy balance and thermal comfort. In this context, the design of textiles, which can modulate the infrared radiation emitted by the human body, is attractive. These fabrics will manage the microclimate between the skin and fabric. The proposed textile design consists of the coating of commercial woven fabrics based on polyamide 6–6 by a dip‐coating process. The coating is based on the incorporation of fine spherical silica particles with a submicron size within thermosensitive poly(N‐isopropylacrylamide) hydrogels. Neat commercial fabrics reflect 12% of the radiation, while the addition of silica particles leads to a reflection of 24% of the infrared radiation in the 5–15 μm wavelengths range. The infrared radiation reflection capacity of the coated fabrics can be increased by managing the size and the content of the silica particles, which allows reaching 36% of reflected radiation. Our findings open opportunities for warming up fabrics and thus reduce energy consumption in heating close space.
Boronyl Borinic Esters: Preparation as B2pin2/secBuLi/TFAA Adducts, Structural Insights and Reactivity in Pd‐catalyzed Allylic Borylation
Authors: Novikov Maxim A. , Novikov Roman A. , Tomilov Yury V. 
Published: April 2023

AbstractNovel boronyl borinic ester I was generated by quenching the B2pin2/secBuLi‐ate complex with trifluoroacetic acid anhydride (TFAA) via ring‐opening in the 1,3,2‐dioxaborolane moiety on ate‐boron. Detailed NMR studies of the B2pin2/secBuLi‐ate complex in solution and in solid state allowed us to assume its oligomeric nature in solids with only ate‐boron involved in the oligomerization process. The O‐trifluoroacetyl pinacolate residue on borinic ester I initially formed on quenching with TFAA undergoes an unusual intramolecular transesterification with the carbonyl group of trifluoroacetyl forming othroester moiety in a few hours at r. t. to give boronyl borinic ester II. A solution of these reagents I/II was proved to be efficient for borylation of (2‐fluoroallyl)pyridinium salts that are highly base sensitive.
Gas sorption properties of a new Zn‐BTB metal–organic framework with permanent porosity
Authors: Choi In‐Hwan , Gu Ja‐Min , Kim Hyun‐Chul , Kim Youngmee , Huh Seong 
Published: April 2023

AbstractA new three‐dimensional (3D) Zn‐based metal–organic framework (Zn‐MOF) with 1,3,5‐benzenetribenzoate (BTB3−), [Zn4O(BTB)2(0.5H2O)4]·H2O·8DEF (1), has been prepared using the reaction between Zn(NO3)2·6H2O and a tritopic bridging ligand 1,3,5‐benzenetribenzoic acid (H3BTB) in the presence of a potentially ditopic bridging ligand 3,3′‐terphenyldicarboxylic acid (H2TPDC). Interestingly, TPDC2− ligand did not incorporate into the resulting Zn‐MOF, and the title compound was not formed in the absence of TPDC2− ligand during the synthesis. After the solvate molecules were removed, Zn‐MOF 1 exhibited a doubly interpenetrated 3D ant net with a large solvent accessible void. The powder x‐ray diffraction pattern of the evacuated 1 did not change significantly compared to that of the as‐prepared 1, thus indicating that 1 has permanent porosity. Gas sorption analyses were performed to investigate the sorption abilities of the evacuated 1 by using several different gases at suitable temperatures: N2, CO2, H2, and CH4.
Antioxidant, Antimicrobial, and Neurotoxicity (in Sh‐Sy5y Cell Lines) Properties of Mg Nanoparticle System (BP@MgNPs) Prepared by Green Synthesis with Bee Pollen
Authors: Bıldır Büşra , Nur Çobanoğlu Duygu , Kaya Bülent 
Published: April 2023

AbstractDue to their distinct characteristics and possible uses in a variety of disciplines, nanoparticles have attracted a lot of attention recently. One area of interest is the synthesis of nanoparticles using natural sources such as bee pollen. The research aims to evaluate the usability of bee pollen extract‐based magnesium nanoparticles (MgNPs). First, a palynological study was used to determine the plant source of bee pollen. The nanoparticle was characterized using scanning electron microscopy, energy dispersive X‐ray analysis, transmission electron microscopy, X‐ray diffractometry, and Fourier transform infrared spectroscopy. The results revealed cubic‐shaped MgNPs with an average size range of 36–40 nm. Afterward, nanoparticles were evaluated for their antioxidant, antimicrobial, and neurotoxic properties. It was determined that the total antioxidant capacity, phenolic (TPC), flavonoid (TFC) content, DPPH radical scavenging, and antimicrobial activity of the nanoparticles were lower than pollen extract. At the same time, nanoparticles have less toxicity than bee pollen.
Leaf Cuticular Waxes of Bermudagrass Response to Environment‐Driven Adaptations of Climate Effect Inferred from Latitude and Longitude Gradient in China
Authors: Chen Chen , Chen Zhao , Chen Minghui , Zhang Jingxue , Wang Liwen , Yan Xuebing 
Published: April 2023

AbstractBermudagrass (Cynodon dactylon) is a widely used warm season lawn grass. Cuticular wax covering the surface of plant leaves plays an important role in helping plants resist biotic and abiotic stresses. We analyzed the changes of cuticle wax in 25 bermudagrass populations from different longitude and latitude gradients, in order to verify how environmental conditions affect the structure and chemical composition of cuticle wax. Five wax components were identified, including alkanes, esters, alkenes, aldehydes and primary alcohols. The wax characteristics were divided into two principal components, explaining 58.2 % and 66.7 % of the total variability in latitude and longitude, even some populations had a certain correlation with each other. Pearson correlation analysis further showed that the total wax coverage, wax component content and antioxidant enzyme activity of bermudagrass populations on the latitudinal gradient had different responses to environmental factors. Finally, nineteen key genes involved in wax biosynthesis, redox and photosynthesis were identified and verified by RT‐qPCR. The results showed that the responses of bermudagrass in different populations to climate change were quite different, which was of great significance for the evolution of bermudagrass populations.
Biocatalytic Nitration of Phenols in Microemulsions at Elevated Temperatures Using Enzymes Stabilized on Magnetic Beads
Authors: Kankanamage Rumasha N. T. , Ahiadu Ben K. , He Jie , Rusling James F. 
Published: April 2023

AbstractEnzymes as catalysts in organic syntheses can provide high regio‐ and stereo‐selectivity, which is often not possible with chemical catalysts. Biocatalysis with iron heme enzymes has proven efficient when the enzyme is sequestered in thin films. An added feature is improved stability. For example, peroxidases chemically crosslinked in poly‐lysine in films on silica nanoparticles were stable for 9 hrs or more at 90 °C, and were used for biocatalysis up to 90 °C. We show here for a series of para‐substituted phenols, single nitro‐phenol products can be selectively synthesized using biocatalytic magnetic beads coated with horseradish peroxidase (HRP) crosslinked in polylysine films. Nitrophenols moieties are important as synthetic intermediates and in drugs. For a series of para‐substituted phenols, biocatalytic nitration gave average turnover numbers 1.8‐fold larger at 75 °C than at 25 °C. For phenols giving <50 % conversion after 1 hr at 25 °C, twice the nitration yield was achieved in 1 hr at 75 °C. Results indicate that this approach should be valuable as a general tool for biocatalytic chemical synthesis.
Finding the Compromise between Brønsted Acidity and Mesoporosity in Hierarchical ZSM‐5 Zeolites
Authors: Desmurs Lucie , Cammarano Claudia , Ramona Gaetan , Gaumard Robin , Mineva Tzonka , Sachse Alexander , Comparot Jean‐Dominique , Cacciaguerra Thomas , Cot Didier , Gimello Olinda , Galarneau Anne , Hulea Vasile 
Published: April 2023

AbstractMesoporous ZSM‐5 catalysts were prepared from a commercial ZSM‐5 (Si/Al=15), using a 2‐step micelle‐templating procedure. By varying the NaOH/Si synthesis ratio in the range of 0.3‐0.7, ZSM‐5 catalysts with different textural and acidic properties were obtained. Increasing the NaOH/Si ratio in the synthesis gel leads to zeolites that feature reduced number of Brønsted acid sites, but higher mesopore volume, which allows for reducing the diffusion path length. In order to assess the best compromise between Brønsted acidity and mesopore volume two test reactions were run. The alkylation of phenol with tert‐butyl alcohol allowed to evidence the accessibility of bulky molecules to active sites. The esterification of benzyl alcohol with hexanoic acid allowed to probe the specificity of Brønsted acid sites in ZSM‐5. The best compromise was found for micro‐/mesoporous ZSM‐5 catalysts prepared with the ratio 0.38<NaOH/Si<0.5.
Recent Advance in Single Nickel Photocatalysis for Carbon‐Heteroatom Bond Formation
Authors: Luo Hang , Feng Yunhui , Lin Luqing 
Published: April 2023

AbstractThe widely used nickel catalysis for carbon‐heteroatom cross‐coupling reactions often requires high energy to achieve reductive elimination on NiII complexes. To overcome the energy barrier of reductive elimination, the NiII complexes often transform to NiIII facile reductive elimination via single electron transfer in photochemistry. Energy transfer to form the excited‐state NiII complexes is feasible as well for carbon‐heteroatom couplings in nickel catalysis. This Review is focused on the discussion about the variant nickel(II) complexes as the precatalysts to forge diverse carbon‐heteroatom bonds under visible‐light irradiation in the absence of exogenous photocatalysts. Summary of photoactive nickel catalysis aims to promote the development of cheap, abundant metals catalyzed carbon‐heteroatom couplings for efficient preparation of highly valuable chemicals.
Structural Self‐Assembly and Applications of Metal–Organic Molecular Containers with Flexible Backbones
Authors: Yang Lu , Huang Xiaoxue , Wang Suna , Zhang Daopeng , Zhou Zhen 
Published: April 2023

AbstractSupramolecular chemistry has become an interdisciplinary discipline of chemistry, physics, and biology. As a huge subunit of supramolecular compounds, the functional metal–organic supramolecular systems with well‐defined cavities which are able to accommodate size‐suitable guests via benign host‐guest behavior, have been known as “metal–organic molecular containers” (MOMCs) and attracted much attentions for their rich chemical properties and wide potential applications in molecular recognition, catalysis, bio‐medical and other fields. In particular, the MOMCs with flexible backbones exhibit a unique feature both in the aspect of structural construction and applications, due to the free rotation and self‐adaptively of the specific functional groups in the skeletons. In this paper, we review several selected examples of the coordination‐driven metal–organic supramolecular systems from the aspects of self‐assembly construction to the various applications. The self‐assembly strategies, especially the different choice of organic ligands with flexible backbones during the construction, leading to quite diverse configurations compared to the rigid ligands, have been also discussed to show a different perspective of metal–organic system construction.
Lead‐Free Double Perovskite Semiconductor with Rigid Spacer‐Induced High‐Tc Dielectric Switch Features
Authors: Xu Peng , Ye Huang , Yao Yunpeng , Zhu Tingting , Luo Junhua 
Published: April 2023

AbstractLayered hybrid perovskites possess exceptional semiconductor features and structural versality, making them viable candidates for developing multifunctional dielectric phase‐transition materials (PTMS). However, most PTMs based on layered hybrid perovskites still suffer from Pb toxicity and low operating temperature. The recently developed hybrid double perovskites provide a new routine to designed PTMs with desired working performance and environment‐friendly chemical compositions. Herein, using rigid aromatic cations as templates, we have successfully synthesized a novel double perovskite (benzylammonium)4AgBiBr8 (1), which consists of corner‐sharing AgBr6 and BiBr6 layers and benzylammonium cations. Notably, 1 exhibits a high‐temperature first‐order reversible solid‐state phase transition at 383/387 K (cooling/heating) and switchable dielectric performance around the temperature. Compared with the soft organic chain version of the compound, the phase transition temperature of 1 shows a large enhancement of 99 K, validating the correctness of the designing strategy. In addition, 1 also exhibits semiconductor characteristics with a calculated bandgap of 2.34 eV and an optical bandgap of 2.29 eV. Remarkably, the single crystal photodetector of 1 shows a low dark current (2.12×10−13 A), a high on/off ratio (1.77×103), and a fast response (τrise=125 μs and τdecay=419 μs). Such a lead‐free phase transition material combined with semiconductor properties provides a new strategy to develop environmentally friendly multifunctional materials.