bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sulfur Immobilization by “Chemical Anchor” to Suppress the Diffusion of Polysulfides in Lithium–Sulfur Batteries
Authors: Zeng Zhipeng , Liu Xingbo 
Published: December 2017

AbstractLithium–sulfur (Li–S) battery is considered to be one of the most promising contenders for the next generation high‐energy storages due to their high theoretical energy density (≈2600 Wh kg−1), which is nearly five times higher than that of the commercial LiCoO2/graphite batteries. However, a series of issues especially for the dissolution of lithium polysulfides (LiPSs) and their “shuttle effect” greatly limit their widely commercial applications. Starting from a brief overview of conventional methods to solve these problems, the achievements spotlighted in this review mainly show that the diffusion of LiPSs can be effectively suppressed by forming strong “chemical anchor” between LiPSs and host materials. The synthetic methods and characterization techniques are reviewed according to different types of chemical bonding between LiPSs and the host materials. Theoretical calculation methods are also summarized here to further understanding the role of these “chemical anchors.” Proposing with some perspectives and future research efforts, this review is hoped to provide an in‐depth understanding and offer avenues in the rational design of Li–S batteries with long cycle life and high energy/power density in the near future.
Novel Host Materials Based on Dibenzothiophene and Carbazolylcarbazole for Extended Lifetime in Blue Phosphorescent Organic Light‐Emitting Diodes
Authors: Shin Su Kyeong , Byeon Sung Yong , Han Si Hyun , Lee Jun Yeob 
Published: December 2017

AbstractHigh triplet energy materials based on dibenzothiophene and carbazolylcarbazole are developed as hosts for lifetime extension in blue phosphorescent organic light‐emitting diodes. Two host materials with or without a biphenyl linker between dibenzothiophene and carbazolylcarbazole are synthesized to get insight about the effect of aromatic linkers on the photophysical properties of the hosts and the device performances of a blue triplet emitter doped phosphorescent organic light‐emitting diodes. It is described that the host design with dibenzothiophene and carbazolylcarbazole at 4‐position of dibenzothiophene is effective for both high efficiency and improved lifetime. In particular, the new hosts improved the lifetime of the blue devices by more than five times while enhancing the quantum efficiency compared to a common triplet host.
Rh‐Catalyzed Annulation of ortho‐C−H Bonds of 2‐Arylimidazoles with 1,4,2‐Dioxazol‐5‐ones toward 5‐Arylimidazo[1,2‐c]quinazolines
Authors: Wu Xiaopeng , Sun Song , Xu Shengbo , Cheng Jiang 
Published: December 2017

AbstractA Rh‐catalyzed unique and direct approach for constructing a series of 5‐arylimidazo[1,2‐c]quinazolines in moderate to excellent yields from simple and readily available 2‐arylimidazoles and 3‐phenyl‐1,4,2‐dioxazol‐5‐ones was described. This procedure proceeds with sequential ortho‐C−H bond amidation and cyclization, which represents a facile and straightforward pathway to access such frameworks.magnified image
Direct Reductive Amination of Carbonyl Compounds Catalyzed by a Moisture Tolerant Tin(IV) Lewis Acid
Authors: Sapsford Joshua S. , Scott Daniel J. , Allcock Nathan J. , Fuchter Matthew J. , Tighe Christopher J. , Ashley Andrew E. 
Published: December 2017

AbstractDespite the ever‐broadening applications of main‐group ‘frustrated Lewis pair’ (FLP) chemistry to both new and established reactions, their typical intolerance of water, especially at elevated temperatures (>100 °C), represents a key barrier to their mainstream adoption. Herein we report that FLPs based on the Lewis acidiPr3SnOTf are moisture tolerant in the presence of moderately strong nitrogenous bases, even under high temperature regimes, allowing them to operate as simple and effective catalysts for the reductive amination of organic carbonyls, including for challenging bulky amine and carbonyl substrate partners.magnified image
High Performance Organic Field‐Effect Transistors with Solid and Aqueous Dielectric Based on a Solution Sheared Sulfur‐Bridged Annulene Derivative
Authors: Campos Antonio , Zhang Qiaoming , Ajayakumar M. R. , Leonardi Francesca , Mas‐Torrent Marta 
Published: December 2017

AbstractThin films of the organic semiconductor meso‐diphenyl tetrathia[22]annulene[2,1,2,1] (DPTTA) are prepared for the first time employing solution‐based techniques to fabricate organic field‐effect transistors (OFETs). Homogeneous and crystalline films of this semiconductor are achieved, thanks to the synergic approach of employing blends of this material with polystyrene (PS) and the high throughput technique bar‐assisted meniscus shearing (BAMS) with a hydrophobic bar. The resulting active layers exhibit state‐of‐the‐art OFET performance with an average mobility of 1 cm2 V−1 s−1, threshold voltage close to 0 V, high on/off ratio, and sharp switch on. Furthermore, a DPTTA:PS formulation is optimized to prepare films suitable for their integration in electrolyte‐gated field effect transistors operating in ultrapure water and 0.5 m NaCl aqueous solution. Such devices also reveal excellent performance with mobility values above 0.1 cm2 V−1 s−1, potentiometric sensitivity ≈200 µV, time response ≈9 ms, and long term stability in ultrapure water. Hence, this work supports the strategy of combining organic semiconductor:polymer blends with BAMS as a powerful route for achieving high performing devices, and also points out DPTTA as a highly promising material to be integrated in organic electronic devices.
Fluorinated Head‐to‐Head Dialkoxybithiophene: A New Electron‐Donating Building Block for High‐Performance Polymer Semiconductors
Authors: Huang Jun , Guo Han , Uddin Mohammad Afsar , Yu Jianwei , Woo Han Young , Guo Xugang 
Published: December 2017

AbstractNew building blocks with good solubility and optimized optoelectrical property are critical for materials development in organic electronics. Herein, a new head‐to‐head linkage containing a donor unit, 4,4′‐difluoro‐3,3′‐dialkoxy‐2,2′‐bithiophene (BTfOR), is synthesized. The dialkoxy chains afford good materials solubility and also planar backbone via noncovalent (thienyl)S⋯(alkoxy)O interactions. Compared to the reported 3,3′‐dialkoxy‐2,2′‐bithiophene (BTOR), F addition leads to BTfOR with lower‐lying frontier molecular orbitals and can further promote polymer packing via additional F⋯S or F⋯H interactions. BTfOR can be readily stannylated to afford tin monomer with high purity and excellent reactivity toward Stille polymerization. As a proof of concept for materials design, BTfOR‐based homopolymer (PBTfOR) is synthesized, showing high molecular weight and strong aggregation. Moreover, the HOMO (−4.98 eV) of PBTfOR is greatly lower than that (−4.54 eV) of nonfluorinated counterpart PBTOR, which is attributed to the addition of F atoms. When incorporated into thin‐film transistors, PBTfOR exhibits a remarkable hole mobility of 0.57 cm2 V−1 s−1, showing an exceptional example of high‐mobility head‐to‐head polythiophene. This study demonstrates that introduction of F atoms can lead to BTfOR with optimized physicochemical properties, and the new BTfOR should find promising use for constructing donor–acceptor copolymers for high‐performance electronic devices.
Iodine‐Catalyzed, Ethyl‐Lactate‐Mediated Synthesis of 1,4‐Benzothiazines via Metal‐Free Cascade Enaminone Transamination and C−H Sulfenylation
Authors: Wan Jie‐Ping , Cao Shuo , Hu Changfeng , Wen Chengping 
Published: December 2017

AbstractThe reactions between N,N‐dimethyl enaminones and ortho‐aminothiophenols provide 1,4‐benzothiazines via cascade C−N bond transamination and C(sp2)−H sulfenylation. By employing biomass‐available ethyl lactate as a green medium, the present work offers a complementary metal‐free cross‐coupling‐based synthesis of 1,4‐benzothiazines to those known tandem reactions catalyzed by transition metals.
Spin Hall Magnetoresistance and Spin Nernst Magnetothermopower in a Rashba System: Role of the Inverse Spin Galvanic Effect
Authors: Tölle Sebastian , Dzierzawa Michael , Eckern Ulrich , Gorini Cosimo 
Published: December 2017

AbstractIn ferromagnet/normal‐metal bilayers, the sensitivity of the spin Hall magnetoresistance and the spin Nernst magnetothermopower to the boundary conditions at the interface is of central importance. In general, such boundary conditions can be substantially affected by current‐induced spin polarizations. In order to quantify the role of the latter, we consider a Rashba two‐dimensional electron gas with a ferromagnet attached to one side of the system. The geometry of such a system maximizes the effect of current‐induced spin polarization on the boundary conditions, and the spin Hall magnetoresistance is shown to acquire a non‐trivial and asymmetric dependence on the magnetization direction of the ferromagnet.
High bonding strength and boiling water resistance of soy protein‐based adhesives via organosilicon–acrylate microemulsion and epoxy synergistic interfacial enhancement
Authors: Zhao Shujun , Xing Fangru , Wang Zhong , Kang Haijiao , Zhang Shifeng , Li Jianzhang 
Published: December 2017

ABSTRACTBoiling water resistance, an important indicator of wood adhesives, represents the capability of adhesives for exterior woodwork applications. However, soy‐based adhesives show poor behaviors in this respect, which limit their applications in outdoor environments. In this article, we report a synergistic modification method of integrating a cocrosslinking system of epoxied polyamideamine‐epichlorohydrin (PAE) and organosilicon–acrylate copolymer latexes (OACLs) to improve soybean meal (SM)‐based adhesive properties. Tailored PAE and OACL SM‐based adhesives demonstrated robust crosslinking structures via multi‐interfacial interactions, where PAE and OACL served as building blocks of an interpenetrating network, which was characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The dry‐shear strength, wet‐shear strength, and boiling water strength of the resulting SM‐based adhesives were 1.41 ± 0.13, 1.32 ± 0.17, and 1.20 ± 0.11 MPa, respectively, with 15 wt % OACL loading; these were 41, 45, and 90% increases, respectively, over the SM–PAE adhesive with which we compared them. Most importantly, the excellent boiling water resistance of the adhesives make them practical for exterior plywood. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46061.
The use of noncovalently modified carbon nanotubes for preparation of hybrid polymeric composite materials with electrically conductive and lightning resistant properties
Authors: Kondrashov Stanislav V. , Soldatov Mikhail A. , Gunyaeva Anna G. , Shashkeev Konstantin A. , Komarova Olga A. , Barinov Dmitriy Y. , Yurkov Gleb Y. , Shevchenko Vitaliy G. , Muzafarov Aziz M. 
Published: December 2017

ABSTRACTIn this work, approach to use of noncovalently modified carbon nanotubes is given for preparation of functional hybrid polymeric composite materials (HPCM) based on epoxy resin. Conductive glass‐fiber plastics with resistivity in transverse and lengthwise direction 9.0·× 102 and 30–50 Ohm cm, respectively, were obtained. The tetrafluoroethylene telomer and fluorocontaining organosilicon copolymer with amino groups were used as modifiers for carbon nanotubes. Thermal, electrical, and mechanical properties of the obtained materials were studied. The mechanism of the effect of noncovalent modification of carbon nanotubes on functional properties of HPCM was discussed. It was found, that type of modifier significantly affects the level of functional properties. The use of fluorocontaining organosilicon copolymer is more optimal in comparison with tetrafluoroethylene telomer. Thus, HPCM with carbon‐fiber filler and this modifier has higher electrical conductivity and lightning strike resistance in comparison with nonmodified HPCM. This approach is promising to impart antistatic properties for glass‐fiber plastics and increase lightning resistance of carbon‐fiber plastics. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46108.
Hydrophobic properties of poly(arylene ether)s derived from linear polydimethysiloxanes and decafluorobiphenyl
Authors: Lin Xinqi , Li Xuesong , Hao Jinmeng , Zhao Xuan , Wei Yanfeng , Mu Jianxin 
Published: December 2017

ABSTRACTA series of novel poly(arylene ether)s were synthesized with diphenol liner polydimethysiloxanes with different silicon numbers (2OH‐PDMS‐P; P = 2, 6, 10, 12, 16) and decafluorobiphenyl via a two‐step nucleophilic substitution polymerization. The chemical structures of the polymers were confirmed by Fourier transform infrared spectrometer, 19F‐NMR and 1H‐NMR spectra. All the polymers provided outstanding hydrophobic properties, high thermal stability and good solubility. The water contact angle (WCA) first increased and then suddenly decreased with the increasing of silicon numbers in PDMS. The highest WCA about 112° was obtained when silicon numbers was ten. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46187.
Simultaneous analysis of oral anticancer drugs for renal cell carcinoma in human plasma using liquid chromatography/electrospray ionization tandem mass spectrometry
Authors: Takasaki Shinya , Tanaka Masaki , Kikuchi Masafumi , Maekawa Masamitsu , Kawasaki Yoshihide , Ito Akihiro , Arai Yoichi , Yamaguchi Hiroaki , Mano Nariyasu 
Published: December 2017

AbstractAn analytical method using high‐performance liquid chromatography/electrospray ionization tandem mass spectrometry has been developed and validated for simultaneous measurement of four tyrosine kinase inhibitors used for renal cell carcinoma and their metabolites in human plasma. Despite their similar structures, it is difficult to measure plasma levels of these compounds simultaneously using optimal MS parameters for each compound because a quantitative range exceeding 50,000‐fold is required. To overcome this problem, we used a linear range shift technique using in‐source collision‐induced dissociation. Linearity ranges of sorafenib, sorafenib N‐oxide, sunitinib, N‐desethyl sunitinib, axitinib and pazopanib were 100–10,000, 10–1,000, 1–100, 1–100, 1–100 and 500–50,000 ng/mL, respectively. The intra‐ and inter‐day precision and accuracy were high, and coefficients of variation and relative error were <10.3% and within ±11.8%, respectively. The matrix effects of all analytes ranged from 87.7 to 114.8%. Extraction recoveries and overall recoveries showed small extraction loss (<15.0%) for all analytes. Moreover, all cancer patient samples used in this study were successfully quantified and fell within the linear range of measurement. Therefore, this novel analytical system using in‐source collision‐induced dissociation has sufficient performance to measure plasma concentrations of these four tyrosine kinase inhibitors and their metabolites for therapeutic drug monitoring.
Designing a course for smart healthcare engineering education
Authors: Rodić‐Trmčić Branka , Labus Aleksandra , Barać Dušan , Popović Snežana , Radenković Božidar 
Published: December 2017

AbstractSmart healthcare is an emerging concept that relies on the synergy of various engineering concepts and intelligent technical innovations applicable to healthcare. Demand for smart healthcare engineers is anticipated to grow, hence, arising a need to educate profile engineers. The goal of this paper is to introduce an approach to designing a course for smart healthcare engineering education. Through the key topics of the course, students acquired new skills and knowledge from emerging technologies underlying smart healthcare. The proposed approach was evaluated at a graduate course at the Faculty of Organizational Sciences, University of Belgrade. The results indicate that there was a positive impact on the learning process as well as a positive learning experience.
Analysis of long‐term survival in multiple myeloma after first‐line autologous stem cell transplantation: impact of clinical risk factors and sustained response
Authors: Lehners Nicola , Becker Natalia , Benner Axel , Pritsch Maria , Löpprich Martin , Mai Elias Karl , Hillengass Jens , Goldschmidt Hartmut , Raab Marc‐Steffen 
Published: December 2017

AbstractThe widespread use of high‐dose therapy and autologous stem cell transplantation (ASCT) as well as the introduction of novel agents have significantly improved outcomes in multiple myeloma (MM) enabling long‐term survival. We here analyze factors influencing survival in 865 newly diagnosed MM patients who underwent first‐line ASCT at our center between 1993 and 2014. Relative survival and conditional survival were assessed to further characterize long‐term survivors. Achievement of complete response (CR) post‐ASCT was associated with prolonged progression‐free survival (PFS) in the whole cohort and with significantly superior overall survival (OS) in the subgroup of patients receiving novel agent‐based induction therapy. Landmark analyses performed at 1, 3, and 5 years post‐ASCT revealed that sustainment of any response had a highly significant influence on survival with no significant differences between sustained CR and sustained inferior responses. Furthermore, outcome was independently improved by administration of maintenance therapy. A subset of patients did experience long‐term survival >15 years. However, conditional survival demonstrated a persistent risk of myeloma‐associated death and cumulative relative survival curves did not show development of a clear plateau, even in prognostically advantageous groups. In conclusion, in this large retrospective study, sustained response after first‐line ASCT was found to be a major prognostic factor for OS independent of depth of sustained response. Administration of maintenance therapy further improved outcome, supporting the hypothesis that interventions to prolong responses achieved post‐ASCT may be essential to reach long‐term survival, especially in the setting of persisting residual disease.
Chemical Composition of Essential Oils from Thymus vulgaris, Cymbopogon citratus, and Rosmarinus officinalis, and Their Effects on the HIV‐1 Tat Protein Function
Authors: Feriotto Giordana , Marchetti Nicola , Costa Valentina , Beninati Simone , Tagliati Federico , Mischiati Carlo 
Published: December 2017

New drugs would be beneficial to fight resistant HIV strains, in particular those capable of interfering with essential viral functions other than those targeted by highly active antiretroviral therapy drugs. Despite the central role played by Tat protein in HIV transcription, a search for vegetable extracts able to hamper this important viral function was never carried out. In this work, we evaluated the chemical composition and possible interference of essential oil from Thymus vulgaris, Cananga odorata, Cymbopogon citratus, and Rosmarinus officinalis with the Tat/TAR‐RNA interaction and with Tat‐induced HIV‐1 LTR transcription. GC/MS Analysis demonstrated the biodiversity of herbal species translated into essential oils composed of different blends of terpenes. In all of them, 4 – 6 constituents represent from 81.63% to 95.19% of the total terpenes. Essential oils of Thymus vulgaris, Cymbopogon citratus, and Rosmarinus officinalis were active in interfering with Tat functions, encouraging further studies to identify single terpenes responsible for the antiviral activity. In view of the quite different composition of these essential oils, we concluded that their interference on Tat function depends on specific terpene or a characteristic blend.
Compared proteomic analysis of 8‐ and 32‐week‐old postnatal porcine ovaries
Authors: Hou Lin , Wang Jian , Wang Yinjuan , Hua Xiuguo , Wu Ji 
Published: December 2017

Pigs share many anatomical and physiological features with humans, offering a unique and viable model for biomedical research. Tandem mass tag method followed by mass spectrometry analysis was utilized to identify peptides (47,405), proteins (14,701), and protein groups (7634) in ovaries of 8‐ and 32‐week‐old postnatal Banna miniature pigs. After annotation and analysis by Kyoto Encyclopedia of Genes and Genomes pathway and Gene Ontology, the proteins were identified as being involved in hormone metabolic pathways and maintenance, proliferation, and regulation of stem cells. In addition, we found 638 differentially expressed proteins between ovaries of 8‐ and 32‐week‐old postnatal Banna miniature pigs. We used Interactive Pathway Explorer to produce an overview of pig ovarian proteomics. Compared with those of the 8‐week‐old group, the proteins enriched in metabolism of steroid hormones, metabolism of lipids, and energy metabolism pathway were upregulated in the 32‐week‐old group, indicating physiological characteristics of sexual maturity. These findings have implications in applications of biomedicine.Significance of the studyPigs share many anatomical and physiological features with humans, offering a unique and viable model for biomedical research. In this study, we used tandem mass tag quantitative proteomics to describe, for the first time, protein expression patterns of postnatal pig ovaries. Proteins involved in hormone metabolic pathways and maintenance, proliferation, and regulation of stem cells were identified. With further analysis by Interactive Pathway Explorer, proteins enriched in metabolism of steroid hormones, metabolism of lipids, and energy metabolism pathway were upregulated in the 32‐week‐old group, indicating physiological characteristics of sexual maturity. These findings have implications in applications of biomedicine.
Ti‐Catalyzed Hydroamination for the Synthesis of Amine‐Containing π‐Conjugated Materials
Authors: Hao Han , Thompson Kyle A. , Hudson Zachary M. , Schafer Laurel L. 
Published: December 2017

AbstractA series of conjugated enamines were prepared by Ti catalyzed anti‐Markovnikov hydroamination. The synthetic route is efficient with yields of up to 94 % and the 100 % atom efficiency of the reaction means that these products are easily isolated and purified. Due to the extended conjugated system, the enamine tautomers were observed exclusively in both solid and solution phases, as determined by X‐ray crystallography and NMR spectroscopy. These new conjugated molecules, with N incorporated into the backbone, show interesting photophysical properties including photo‐luminescent quantum yields of up to 0.26. Notably, through the incorporation of B to give a donor–acceptor π‐conjugated system, a redshift of approximately 100 nm is observed for the emission maximum along with the anticipated solvatochromic shifts.
Why Bond Critical Points Are Not “Bond” Critical Points
Authors: Shahbazian Shant 
Published: December 2017

AbstractEquating (3,−1) critical points (CPs), derived from the topological analysis of the electron densities, to chemical bonds has triggered a lot of confusion in recent years. Part of this confusion stems from calling these CPs “bond” CPs (BCPs). While the origin of this terminology is traceable to the late seventies and beginning of eighties, when it sounded reasonable, new computational studies conducted on molecular electron densities cast serious doubt on the supposed universal equivalence between the chemical bonds and (3,−1) CPs. Herein, recent computational studies are briefly reviewed to demonstrate why (3,−1) CPs are not indicators of chemical bonds. It is discussed why this confusing terminology needs to be changed and reemphasized that (3,−1) CPs should be called “line” critical points (LCPs). The proposed terminology detaches the topological properties of molecular electron densities from any a priori chemical interpretation. Such detachment, if adopted by other authors, will hopefully prevent further misinterpretation of the data emerging from the quantum theory of atoms in molecules (QTAIM).