bluuebunny/crossref_metadata_2025_split huggingface dataset:
Parallel and Precise Macroscopic Supramolecular Assembly through Prolonged Marangoni Motion
Authors: Cheng Mengjiao , Zhu Guiqiang , Li Lin , Zhang Shu , Zhang Dequn , Kuehne Alexander J. C. , Shi Feng 
Published: August 2018

AbstractMacroscopic supramolecular assembly (MSA) is a rising concept in supramolecular science, in which building blocks with sizes exceeding 10 μm self‐assemble into larger structures. MSA faces the challenge of developing appropriate self‐propulsion strategies to improve the motility of the macroscopic building blocks. Although the Marangoni effect is an ideal driving force with random motion paths, excessive aggregation of the surfactant and fast decay of motion remain challenging problems. Hence, a molecular interference strategy to drive the self‐assembly over longer times by finely controlling the interfacial adsorption of surfactants using dynamic equilibria is proposed. Surfactant depletion through molecular recognition in the solution to oppose fast interfacial aggregation efficiently facilitates macroscopic motion and assembly. The resulting motility lifetime is extended remarkably from 120 s to 2200 s; with the improved kinetic energy, the assembly probability increases from 20 % to 100 %.
trans‐Cyclooctenes as Halolactonization Catalysts
Authors: Einaru Shunsuke , Shitamichi Kenta , Nagano Tagui , Matsumoto Akira , Asano Keisuke , Matsubara Seijiro 
Published: August 2018

AbstractThe strained olefins in trans‐cyclooctenes serve as efficient catalysts for halolactonizations, including bromolactonizations and iodolactonizations. The trans‐cyclooctene framework is essential for excellent catalytic performance, and the substituents also play important roles in determining efficiency. These results are the first demonstration of catalysis by a trans‐cyclooctene.
Oxygen‐Delivery Materials: Synthesis of an Open‐Cage Fullerene Derivative Suitable for Encapsulation of H2O2 and O2
Authors: Li Yanbang , Lou Ning , Xu Dan , Pan Changwang , Lu Xing , Gan Liangbing 
Published: August 2018

AbstractAn open‐cage [60]fullerene was prepared through a multiple‐step sequence based on peroxide‐mediated cage‐opening reactions. Key steps include repeated C60‐sensitized singlet‐oxygen oxidation of electron‐rich amino enol double bonds to form two lactone and two lactam moieties on the rim of the orifice. Single‐crystal X‐ray analysis shows that the 22‐membered orifice has an ellipsoid shape with the major axis at 6.7 Å and the minor axis at 3.5 Å. Encapsulation of H2O2 was observed under atmospheric pressure at room temperature. Oxygen is also effectively trapped during the process.
Amino‐Assisted Anchoring of CsPbBr3 Perovskite Quantum Dots on Porous g‐C3N4 for Enhanced Photocatalytic CO2 Reduction
Authors: Ou Man , Tu Wenguang , Yin Shengming , Xing Weinan , Wu Shuyang , Wang Haojing , Wan Shipeng , Zhong Qin , Xu Rong 
Published: August 2018

AbstractHalide perovskite quantum dots (QDs) have great potential in photocatalytic applications if their low charge transportation efficiency and chemical instability can be overcome. To circumvent these obstacles, we anchored CsPbBr3 QDs (CPB) on NHx‐rich porous g‐C3N4 nanosheets (PCN) to construct the composite photocatalysts via N−Br chemical bonding. The 20 CPB‐PCN (20 wt % of QDs) photocatalyst exhibits good stability and an outstanding yield of 149 μmol h−1 g−1 in acetonitrile/water for photocatalytic reduction of CO2 to CO under visible light irradiation, which is around 15 times higher than that of CsPbBr3 QDs. This study opens up new possibilities of using halide perovskite QDs for photocatalytic application.
Highly Efficient Electroreduction of CO2 to Methanol on Palladium–Copper Bimetallic Aerogels
Authors: Lu Lu , Sun Xiaofu , Ma Jun , Yang Dexin , Wu Haihong , Zhang Bingxing , Zhang Jianling , Han Buxing 
Published: August 2018

AbstractElectrochemical reduction of CO2 to CH3OH is of great interest. Aerogels have fine inorganic superstructure with high porosity and are known to be exceptional materials. Now a Pd−Cu bimetallic aerogel electrocatalyst has been developed for conversion of CO2 into CH3OH. The current density and Faradaic efficiency of CH3OH can be as high as 31.8 mA cm−2 and 80.0 % over the Pd83Cu17 aerogel at a very low overpotential (0.24 V). The superior performance of the electrocatalyst results from efficient adsorption and stabilization of the CO2 radical anion, high Pd0/PdII and CuI+Cu0/CuII ratios, and sufficient Pd/Cu grain boundaries of aerogel nanochains.
Synthesis and Characterization of Cs4Ga6Q11 (Q=S, Se): Chalcogenometalates with Exotic Polymeric Anions
Authors: Friedrich Daniel , Greim Dominik , Schlosser Marc , Siegel Renée , Senker Jürgen , Pfitzner Arno 
Published: August 2018

AbstractTwo new chalcogenogallates Cs4Ga6Q11 (Q=S, Se) were obtained by a controlled thermal treatment of CsN3 in the presence of stoichiometric amounts of Ga2Q3 and the elemental chalcogens at elevates temperatures. Both isotypic compounds crystallize in the space group P
(no. 2). The most prominent structural feature in these chalcogenogallates are the complex anionic Dreier double chains
[Ga6Q114−] formed by condensed GaQ4 tetrahedra. The semiconductors Cs4Ga6S11 (Eg=3.14 eV) and Cs4Ga6Se11 (Eg=2.41 eV) were further studied by using UV/Vis, 133Cs and 71Ga solid‐state NMR spectroscopy, and complementary DFT calculations. The 133Cs MAS NMR spectra are characteristic for cationic cesium and vibrational spectra show two distinct regions, attributed to the Ga–Q valence and deformation vibrations, respectively. High‐temperature studies revealed incongruent melting of both solids, which is also depicted in updated binary phase‐diagrams Cs2Q–Ga2Q3 (Q=S, Se).
Blocking EGFR Activation with Anti‐EGF Nanobodies via Two Distinct Molecular Recognition Mechanisms
Authors: Guardiola Salvador , Varese Monica , Sánchez‐Navarro Macarena , Vincke Cécile , Teixidó Meritxell , García Jesús , Muyldermans Serge , Giralt Ernest 
Published: August 2018

AbstractOne of the hallmarks of cancer is the overproduction of growth factors such as EGF. Despite the clinical success achieved by EGFR‐targeted therapies, their long‐term efficacy is compromised by the onset of drug‐resistant mutations. To address this issue, a family of camelid‐derived single‐domain antibodies (Nbs) were generated, obtaining the first direct EGF inhibitors that prevent EGFR phosphorylation and pathway activation through this new mechanism of action. The two best Nbs were subjected to a detailed investigation of their interaction mechanism that revealed important differences in their binding kinetics and equilibrium thermodynamics. These distinct behaviors at the biophysical level translate into an equally efficient inhibition of the cellular EGFR phosphorylation, thus proving the efficacy of these Nbs to turn off the initiation of this key oncogenic pathway in cancer cells.
Balancing Mechanical Stability and Ultrahigh Porosity in Crystalline Framework Materials
Authors: Hönicke Ines M. , Senkovska Irena , Bon Volodymyr , Baburin Igor A. , Bönisch Nadine , Raschke Silvia , Evans Jack D. , Kaskel Stefan 
Published: August 2018

AbstractA new mesoporous metal–organic framework (MOF; DUT‐60) was conceptually designed in silico using Zn4O6+ nodes, ditopic and tritopic linkers to explore the stability limits of framework architectures with ultrahigh porosity. The robust ith‐d topology of DUT‐60 provides an average bulk and shear modulus (4.97 GPa and 0.50 GPa, respectively) for this ultra‐porous framework, a key prerequisite to suppress pore collapse during desolvation. Subsequently, a cluster precursor approach, resulting in minimal side product formation in the solvothermal synthesis, was used to produce DUT‐60, a new crystalline framework with the highest recorded accessible pore volume (5.02 cm3 g−1) surpassing all known crystalline framework materials.
Buckyball Difluoride F2−@C60+—A Single‐Molecule Crystal
Authors: Foroutan‐Nejad Cina , Straka Michal , Fernández Israel , Frenking Gernot 
Published: August 2018

AbstractWe report the F2@C60system as the first example of an endohedral fullerene in which C60acts as a cation C60+interacting with endohedral anion, F2−. Our state‐of‐the‐art computations reveal that in F2@C60, despite of the known high electron affinity of C60, an electron is transferred from C60to F2resulting in the F2−@C60+system. The F−F bond length in F2@C60is substantially longer than in free F2, which is the result of electron‐transfer to the antibonding σumolecular orbital of F2. Interestingly, although there is a full charge‐transfer of one electron between C60and F2, only negligible delocalized covalent interactions are found between F2−and C60+which is a reminiscent of ionic crystals. Therefore, F2−@C60+can be considered as a single‐molecule crystal. The other encapsulated halogens in C60do not show such behavior.
Exploring the “Goldilocks Zone” of Semiconducting Polymer Photocatalysts by Donor–Acceptor Interactions
Authors: Kochergin Yaroslav S. , Schwarz Dana , Acharjya Amitava , Ichangi Arun , Kulkarni Ranjit , Eliášová Pavla , Vacek Jaroslav , Schmidt Johannes , Thomas Arne , Bojdys Michael J. 
Published: August 2018

AbstractWater splitting using polymer photocatalysts is a key technology to a truly sustainable hydrogen‐based energy economy. Synthetic chemists have intuitively tried to enhance photocatalytic activity by tuning the length of π‐conjugated domains of their semiconducting polymers, but the increasing flexibility and hydrophobicity of ever‐larger organic building blocks leads to adverse effects such as structural collapse and inaccessible catalytic sites. To reach the ideal optical band gap of about 2.3 eV, A library of eight sulfur and nitrogen containing porous polymers (SNPs) with similar geometries but with optical band gaps ranging from 2.07 to 2.60 eV was synthesized using Stille coupling. These polymers combine π‐conjugated electron‐withdrawing triazine (C3N3) and electron donating, sulfur‐containing moieties as covalently bonded donor–acceptor frameworks with permanent porosity. The remarkable optical properties of SNPs enable fluorescence on‐off sensing of volatile organic compounds and illustrate intrinsic charge‐transfer effects.
A series of new lanthanide complexes with 2‐bromo‐5‐methoxybenzoic acid and 5,5′‐dimethyl‐2,2′‐bipyridine: Crystal structures, thermal behavior, luminescent and magnetic properties
Authors: Xiao‐Hui Wu , Ning Ren , Jian‐Jun Zhang 
Published: August 2018

Four new binuclear lanthanide complexes [Ln(2‐Br‐5‐MOBA)3(5,5′‐DM‐2,2′‐bipy)]2 (Ln = Gd(1), Tb(2), Dy(3), Er(4); 2‐Br‐5‐MOBA = 2‐bromo‐5‐methoxybenzoate; 5,5′‐DM‐2,2′‐bipy = 5,5′‐dimethyl‐2,2′‐bipyridine) have been successfully synthesized and then further characterized by infrared spectra, single‐crystal X‐ray diffraction, elemental analyses and Powder X‐ray diffraction (PXRD). Complexes 1–3 are isostructure with the coordination number of nine, while the complex 4 is eight‐coordinated exhibiting a different structure. Nevertheless, the complexes 1–4 form the same 1D, 2D and 3D supramolecular structures by hydrogen bonding (C‐H···Br and C‐H···O) and π–π stacking interactions. Thermal behavior of complexes 1–4 was studied by TG/DSC‐FTIR techniques. The luminescent spectra of complexes 2 and 3 were investigated at room temperature, which exhibits characteristic luminescence of Tb3+ and Dy3+ ions, respectively. The luminescence decay curve of the complex 2 was measured, which follows double‐exponential decay law. The luminescence lifetime of complex 2 is 0.693 ms. What's more, the magnetic properties of complexes 1–4 have been investigated by measuring the magnetic susceptibility in the temperature range of 2–300 K.
Recovery and Characterization of Enzymatic Protein Hydrolyzates and Fat from Chicken Skin
Authors: Fallah‐Delavar Mostafa , Farmani Jamshid 
Published: August 2018

AbstractChicken skin is a valuable source of proteins and fat. In this work, the efficacy of five commercial proteases (Alcalase, Protamex, Pancreatic trypsin, Neutrase, and Flavourzyme) was evaluated in enzymatic recovery of fat and protein hydrolyzates from chicken skin. The highest (49.19%) and lowest (8.92%) degrees of hydrolysis (DH) of protein were obtained using Alcalase and Flavourzyme, respectively. Protein hydrolyzates obtained using Flavourzyme showed the highest water‐holding capacity (WHC), oil‐holding capacity (OHC), and emulsifying activity index (EAI). The highest foaming capacity was observed in the hydrolyzate produced using Alcalase, Protamex, or Trypsin treatments. Hydrolysis using Protamex or Trypsin resulted in the highest fat yield (34.48–35.85%). Fatty‐acid composition, iodine value, unsaponifiable matter, and the amount of iron in chicken‐skin fats were not affected by the enzyme's type. The phosphorus content of chicken‐skin fat was in the range of 5.6–10.8 ppm, the lowest obtained by Flavourzyme. The oxidative stability index of the enzymatically extracted fat was in the range of 0.98–1.51 h at 110 °C. In conclusion, the enzyme type had a significant effect on some physicochemical properties of fat and protein hydrolyzates.
Dynamic measurement of liquid‐phase mass transfer coefficient and significance on the SO2 absorption rate
Authors: Liu Dunyu , Jin Jing , Xiong Zhibo , Stanger Rohan , Wall Terry 
Published: August 2018

AbstractLiquid‐phase mass transfer coefficient is important for characterization of gas–liquid reactors and relevant to the modelling of gas absorption rate. Both direct and indirect methods have been used to obtain this coefficient. However, these methods have not been compared on the same basis. Liquid‐phase mass transfer coefficients were measured in three ways—(a) CO2 absorption into water, (b) SO2 absorption into 1 kmol m−3 of HCl, and (c) O2 absorption into Na2SO3—and then normalized to the coefficient for SO2. Based on transient experiments, the normalized values for liquid‐phase mass transfer coefficient obtained from three methods are in turn of
. The fluxes of SO2 predicted from three methods were further compared with the experimental values measured in SO2‐NaOH system. The fluxes predicted from
agreed well with the experimental values, whereas those from
and
were significantly lower or higher. Therefore, the liquid‐phase mass transfer coefficient is preferably obtained from the targeted gas. Modelling on the flux of SO2 demonstrates the transition of controlling regions against pH. At pH above 4, the gas side resistance is larger than the liquid side, whereas at pH below 4, the gas side resistance is smaller than the liquid side.
Study on the interactions between SDBS/SOE‐60 mixed surfactant and PVP in solution
Authors: Hu Chang , Du Zhiping , Tai Xiumei , Liu Xiaoying 
Published: August 2018

ABSTRACTThe interactions between the mixed surfactants sodium dodecyl benzenesulfonate (SDBS) and modified oil ethoxylate (SOE‐60) with polyvinylpyrrolidone (PVP) were studied at 25 ± 1 °C using a surface tension meter, Ubbelohde viscometer, and fluorescence spectrophotometer. Interaction mechanisms of SDBS/SOE‐60‐PVP systems were explained by the “necklace and bead” model. The results showed that the interaction could be divided into three parts by two characteristic concentrations: the critical aggregation concentration (cac) and the polymer saturation point (psp). The interaction mechanisms of SDBS/SOE‐60‐PVP systems are consistent with the “necklace and bead” model. The binding mixing surfactant micelles, formed by free SDBS and SOE‐60 molecules, were bound to PVP chains by hydrophobic and ion–dipole interactions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46717.
The archaeology of world war I tanks in the Ypres Salient (Belgium): A non‐invasive approach
Authors: Stichelbaut Birger , Note Nicolas , Bourgeois Jean , Van Meirvenne Marc , Van Eetvelde Veerle , Van den Berghe Hanne , Gheyle Wouter 
Published: August 2018

AbstractIn the past decade, the research of archaeological remains from World War I has become mainstream. This article uses non‐destructive techniques to investigate the possible material remains of tank warfare in Belgium. During World War I, tanks were used for the first time as a ‘land battleship’ in order to break through the stalemate in the trenches. During the Battle of Messines and the Third Battle of Ypres (1917), tanks were used in Belgium to assist a large‐scale Allied offensive. The offensive was a complete failure and besides the terrible human cost, many of the tanks became derelict in so‐called ‘tank cemeteries’. This article combines historical information, contemporary historical aerial photographs and state‐of‐the‐art geophysical soil sensing to assess the distribution, density and possible material remains of the tank war. Aerial photo‐interpretation and geographic information system (GIS)‐mapping sheds new light on the location of 97 tank wrecks in the Ypres Salient. Two sites were selected for further geophysical research. By using electromagnetic induction, it was possible to identify the remains of five tanks as geophysical anomalies, which corresponds to a debris field spread. In this article, both non‐invasive and non‐destructive techniques will demonstrate the significant potential for investigating cases on a landscape scale without any intense interference of the highly disturbed topsoil.
Synthesis of Silver Hollandite Nanorectangular Cuboids as Negative Electrode Material for High‐Performance Asymmetric Supercapacitors and Lithium‐Ion Capacitors
Authors: Nagamuthu Sadayappan , Ryu Kwang‐Sun 
Published: August 2018

AbstractSilver hollandite nanorectangular cuboids were synthesized via a hydrothermal route. The structural and valance state of the prepared samples were characterized by X‐ray diffraction and X‐ray photoelectron spectroscopy. These studies confirmed the formation of tetragonal and silver hollandite crystal structures. Surface morphological studies reveal the nanorectangular cuboid structure. Silver hollandite was used as the negative electrode for an aqueous asymmetric supercapacitor device. Three electrode measurements revealed a maximum specific capacitance of 605 F g−1 at a specific current of 2 A g−1. The asymmetric device yielded a high specific cell capacitance of 157 F g−1 at a current of 1 A g−1 and a maximum energy density of 70.65 W h kg−1 at a power density of 902 W kg−1. The silver hollandite working electrode was analysed in a Li‐ion capacitor half‐ and full‐cell. The lithium‐ion capacitor full‐cell exhibited a specific cell capacitance of 64 F g−1 and a maximum energy density of 142 W h kg−1 at a power density of 4031.4 W kg−1. The asymmetric supercapacitor and Li‐ion capacitor full‐cell demonstrated higher energy density than lead‐acid batteries and a comparable energy density to metal hydride batteries.
Violet‐blue emission property of the cerium‐ion doped CaHfO3: Doping and temperature dependence
Authors: Lee Seungmin , Lim Junhwi , Lee Y. S. 
Published: August 2018

AbstractWe investigated the emission property of perovskite CaHfO3 polycrystals with various concentrations of cerium ion (Ce3+). With a wide range of UV photoexcitation, we observed a strong emission near 430 nm which should originate from 5d‐4f transitions in the Ce3+ ions. Combining these emission spectra with the photoluminescence excitation spectra, we estimated the Stokes shift to be 6700 cm−1, irrespective of the Ce3+ ion doping concentration. We found that the violet‐blue emissions in Ce3+ ions showed non‐trivial temperature dependence in their peak position and intensity. We found interesting low‐temperature behavior of the violet‐blue emission, which might be attributed to the thermal lattice effect in CaHfO3. We also discussed our results with those of the similar materials, perovskite zirconates. Our systematic studies provide useful information on the host material CaHfO3 for a future study on the violet‐blue emission of Ce3+ ions.
Analysis of Interactions between Telomeric i‐Motif DNA and a Cyclic Tetraoxazole Compound
Authors: Sedghi Masoud Shadi , Yamaoki Yudai , Ma Yue , Marchand Adrien , Winnerdy Fernaldo Richtia , Gabelica Valérie , Phan Anh Tuân , Katahira Masato , Nagasawa Kazuo 
Published: August 2018

AbstractThe interaction of a macrocyclic tetraoxazole compound, L2H2‐4OTD (1), with two aminoalkyl side chains and telomeric i‐motif, was investigated by means of electrophoretic mobility shift assay, circular dichroism spectroscopy, mass spectrometry and NMR spectroscopy analyses. The results indicate that 1 interacts with the i‐motif structure at two preferred binding sites.
2018 ACC/HRS/NASCI/SCAI/SCCT Expert Consensus Document on Optimal Use of Ionizing Radiation in Cardiovascular Imaging—Best Practices for Safety and Effectiveness, Part 2: Radiological Equipment Operation, Dose‐Sparing Methodologies, Patient and Medical Personnel Protection
Authors:   Writing Committee Members, Hirshfeld John W. , Ferrari Victor A. , Bengel Frank M. , Bergersen Lisa , Chambers Charles E. , Einstein Andrew J. , Eisenberg Mark J. , Fogel Mark A. , Gerber Thomas C. , Haines David E. , Laskey Warren K. , Limacher Marian C. , Nichols Kenneth J. , Pryma Daniel A. , Raff Gilbert L. , Rubin Geoffrey D. , Smith Donnette , Stillman Arthur E. , Thomas Suma A. , Tsai Thomas T. , Wagner Louis K. , Samuel Wann L. ,   ACC Task Force On Expert Consensus Decision Pathways, Januzzi James L. , Afonso Luis C. , Everett Brendan , Hernandez Adrian F. , Hucker William , Jneid Hani , Kumbhani Dharam , Edward Marine Joseph , Morris Pamela Bowe , Piana Robert N. , Watson Karol E. , Wiggins Barbara S. 
Published: August 2018

AbstractThe stimulus to create this document was the recognition that ionizing radiation‐guided cardiovascular procedures are being performed with increasing frequency, leading to greater patient radiation exposure and, potentially, to greater exposure to clinical personnel. While the clinical benefit of these procedures is substantial, there is concern about the implications of medical radiation exposure. ACC leadership concluded that it is important to provide practitioners with an educational resource that assembles and interprets the current radiation knowledge base relevant to cardiovascular procedures. By applying this knowledge base, cardiovascular practitioners will be able to select procedures optimally, and minimize radiation exposure to patients and to clinical personnel.“Optimal Use of Ionizing Radiation in Cardiovascular Imaging ‐ Best Practices for Safety and Effectiveness” is a comprehensive overview of ionizing radiation use in cardiovascular procedures and is published online. To provide the most value to our members, we divided the print version of this document into 2 focused parts. “Part I: Radiation Physics and Radiation Biology” addresses radiation physics, dosimetry and detrimental biologic effects. “Part II: Radiologic Equipment Operation, Dose‐Sparing Methodologies, Patient and Medical Personnel Protection” covers the basics of operation and radiation delivery for the 3 cardiovascular imaging modalities (x‐ray fluoroscopy, x‐ray computed tomography, and nuclear scintigraphy). For each modality, it includes the determinants of radiation exposure and techniques to minimize exposure to both patients and to medical personnel.