bluuebunny/crossref_metadata_2025_split huggingface dataset:
Reversible Thermal Switching of Aqueous Dispersibility of Multiwalled Carbon Nanotubes
Authors: O'Driscoll Luke J. , Welsh Daniel J. , Bailey Steven W. D. , Visontai David , Frampton Harry , Bryce Martin R. , Lambert Colin J. 
Published: January 2015

AbstractEasily reversible aqueous dispersion/precipitation of multiwalled carbon nanotubes (MWNTs) has been demonstrated using small‐molecule non‐ionic pyrene‐based surfactants, which exhibit lower critical solution temperature (LCST) phase behaviour. The MWNTs are dispersed by means of non‐covalent interactions. The dispersibility can be switched “off” (i.e., MWNTs precipitated) upon heating and switched “on” (i.e., MWNTs re‐dispersed) upon cooling and merely swirling the sample at room temperature, that is, under very mild conditions. This effect is also observed under high ionic strength conditions with NaCl in the aqueous phase.
From Minutes to Years: Predicting Organotrifluoroborate Solvolysis Rates
Authors: Liu Zhibo , Chao Daniel , Li Ying , Ting Richard , Oh Jihyoon , Perrin David M. 
Published: January 2015

AbstractOrganotrifluoroborates solvolyze in water at rates that vary over five orders of magnitude. The negative logarithm of the solvolytic rate constant, pk(BF), correlates exceptionally well with the pKa of the analogous carboxylic acid (R2=0.984). This unforeseen correlation may be of predictive value for several applications including Suzuki–Miyaura cross‐coupling reactions and the design of 18F‐organotrifluoroborate radioprosthetic groups.
Unexpected Photoluminescence of Fluorinated Naphthalene Diimides
Authors: Maniam Subashani , Cox Rosalind P. , Langford Steven J. , Bell Toby D. M. 
Published: January 2015

AbstractTwo new amino core‐substituted naphthalene diimides (cNDIs) bearing fluorinated side chains have been synthesised. Steady‐state and time‐resolved fluorescence spectroscopy reveals unprecedented optical properties for the cNDIs with high quantum yields of ∼0.8 and fluorescence lifetimes of ∼13 ns in a range of solvents. These properties are apparent at the level of single molecules, where the compounds also show exceptional photostability under pulsed‐laser excitation. Photon emission is remarkably consistent with very few long timescale (millisecond or longer) interruptions with molecules regularly undergoing >107 cycles of excitation and emission. Intermittencies owing to triplet‐state formation occur on a sub‐millisecond timescale with a low yield of 1–2 %, indicating that the presence of the fluorine atoms does not lead to a significant triplet yield through the heavy‐atom effect. These properties make the compounds excellent candidates for single‐molecule labelling applications.
ChemInform Abstract: Synthesis and Characterization of Cd4YbO(BO3)3 — A Congruent Melting Cadmium—Ytterbium Oxyborate with Large Nonlinear Optical Properties.
Authors: Zou Guohong , Huang Ling , Cai Huaqiang , Wang Shichao , Ye Ning 
Published: January 2015

AbstractSingle crystals of the title compound are grown by solid state reaction of CdCO3, H3BO3, and Yb2O3 in a molar ratio of 8:6:1 (Pt crucible, 1200 °C).
ChemInform Abstract: Regiospecific Ficini [2 + 2] Cycloaddition of Ynamides with Cyclic Isoimidium Salts under Catalyst‐Free Conditions.
Authors: Yuan Yini , Bai Lu , Nan Jiang , Liu Jingjing , Luan Xinjun 
Published: January 2015

AbstractA convenient process is developed for the regioselective [2 + 2] cycloaddition of cyclic isoimidium tetrafluoroborates with ynamides without the need for any catalytic additive.
Experimentelle Bestimmung von Wärmeübergang und Druckverlust bei Kondensation im vertikalen Plattenspalt. Experimental Determination of Condensation Heat Transfer and Pressure Drop in a Vertical Plate Gap
Authors: Müller Arne , Kabelac Stephan 
Published: January 2015

AbstractPlattenwärmeübertrager haben sich als kompakte, effiziente Wärmeübertrager etabliert. Bisher existieren jedoch nur wenige veröffentlichte Daten bzw. Korrelationen zur zuverlässigen Berechnung des Wärmeüberganges und des Druckverlustes bei Mehrphasenströmungen und Phasenübergängen. Das Ziel dieser Arbeit ist die experimentelle Untersuchung des zweiphasigen Wärmeüberganges und Druckverlustes bei der Kondensation im vertikalen, gewellten Plattenspalt. Die Ergebnisse von Kondensationsversuchen mit dem Kältemittel R134a und Wasserdampf werden vorgestellt und Literaturmodellen gegenübergestellt.
Pillow Plate Heat Exchangers – Investigation of Flow Characteristics and Wetting Behavior at Single‐Flow Conditions
Authors: Siebeneck Karl , Popov Wjatscheslaw , Stefanak Tobias , Scholl Stephan 
Published: January 2015

AbstractExperimental and theoretical results on the flow pattern and film thickness of liquid falling films on the outside of a vertical pillow‐type plate heat exchanger are presented. With the experimental setup, the wetting of a pillow plate and the local film thickness can be determined. The calculated mean film thickness is compared to literature data with an experimental investigation of a flat plate to assess the presented evaluation technique. Correlations for the mean film thickness on a flat plate and a pillow plate are given. The minimum flow rate per wetted length for a pillow plate is investigated.
Oxadiazole‐2‐thiol Adsorption on Gold Nanorods: A Joint Theoretical and Experimental Study by Using SERS, XPS, and DFT
Authors: Haidar Israa , Lau‐Truong Stéphanie , Aubard Jean , Renault Jean‐Philippe , Félidj Nordin , Maurel François , Boubekeur‐Lecaque Leïla 
Published: January 2015

AbstractThe chemisorption of 1,3,4‐oxadiazole‐2‐thiol (ODT) on gold nanorods has been investigated by using surface‐enhanced Raman spectroscopy (SERS) and density functional theory (DFT). Although most of the SERS spectra have remarkable similarity to the normal Raman spectra of the pure analyte, the adsorption of ODT on a gold surface leads to a drastic change in its Raman spectrum and distinct vibrational features are obtained with gold nanorods and spherical nanoparticles. Simulated Raman spectra for hybrid systems that consist of an oxadiazole moiety coordinated to a Au20 gold cluster provided valuable information about the coordination mode and enabled us to assign vibration modes.
Reaction Mechanism of Methanol to Formaldehyde over Fe‐ and FeO‐Modified Graphene
Authors: Thivasasith Anawat , Sirijaraensre Jakkapan , Khongpracha Pipat , Warakulwit Chompunuch , Jansang Bavornpon , Limtrakul Jumras 
Published: January 2015

AbstractWe employed periodic DFT calculations (PBE‐D2) to investigate the catalytic conversion of methanol over graphene embedded with Fe and FeO. Two possible pathways of dehydrogenation to formaldehyde and dehydration to dimethyl ether (DME) over these catalysts were examined. Both processes are initiated with the activation of methanol over the catalytic center through OH cleavage. As a result, a methoxo‐containing intermediate is formed. Subsequently, H‐transfer from the methoxy to the adjacent ligand leads to the formation of formaldehyde. Conversely, the activation of the second methanol over the intermediate gives DME and H2O. Over Fe/graphene, the dehydration process is kinetically and thermodynamically preferable. Unlike Fe/graphene, FeO/graphene is predicted to be an efficient catalyst for the dehydrogenation process. Oxidative dehydrogenation over FeO/graphene takes place through two steps with free energy barriers of 5.7 and 10.2 kcal mol−1.
Rapid Precipitation: An Alternative to Solvent Casting for Organic Solar Cells
Authors: Dattani Rajeev , Telling Mark T. F. , Lopez Carlos G. , Krishnadasan Siva H. , Bannock James H. , Terry Anne E. , de Mello John C. , Cabral João T. , Nedoma Alisyn J. 
Published: January 2015

AbstractRapid precipitation, immersion of a liquid formulation into a nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly‐3‐hexylthiophene (P3HT), phenyl‐C61‐butyric acid methyl ester (PCBM), and chlorobenzene were processed into bulk samples by using two distinct routes: rapid precipitation and drop casting. The resulting structure, phases, and crystallinity were analyzed by using small‐angle neutron scattering, X‐ray diffraction, differential scanning calorimetry, and muon spin resonance. Rapid precipitation was found to induce a finely structured phase separation between PCBM and P3HT, with 65 wt % crystallinity in the P3HT phase. In contrast, solvent casting resulted in a mixed PCBM/P3HT phase with only 43 wt % P3HT crystallinity. The structural advantages conferred by rapid precipitation were shown to persist following intense thermal treatments.
Behavioral comparisons of male and female pups of prairie voles (Microtus ochrogaster) and meadow voles (M. pennsylvanicus)
Authors: McGuire Betty , Bemis William E. 
Published: January 2015

ABSTRACTSexual dimorphism in mammals typically is reduced in monogamous species relative to polygynous species, with promiscuous species being intermediate. This pattern of dimorphism characterizes adult behavior and body mass of prairie voles, a monogamous species, when compared with meadow voles, a closely related polygynous or promiscuous species. We examined whether the pattern also applies to young of the two species by observing individual pups living in family groups in seminatural environments. Observations during the second week of life revealed no sex differences in pup behavior or body mass. However, we detected species differences in suckling behavior, jockeying for position within the huddle (especially among males), and body mass that replicate and extend our previous observations. These data indicate that patterns of sexual dimorphism associated with different mating systems may not be evident in juvenile mammals, but that species differences in behavior and body mass can be obvious at this stage. © 2015 Wiley Periodicals, Inc. Dev Psychobiol 57: 237–246, 2015.
The eating disorder assessment for DSM‐5 (EDA‐5): Development and validation of a structured interview for feeding and eating disorders
Authors: Sysko Robyn , Glasofer Deborah R. , Hildebrandt Tom , Klimek Patrycja , Mitchell James E. , Berg Kelly C. , Peterson Carol B. , Wonderlich Stephen A. , Walsh B. Timothy 
Published: January 2015

ABSTRACTObjectiveExisting measures for DSM‐IV eating disorder diagnoses have notable limitations, and there are important differences between DSM‐IV and DSM‐5 feeding and eating disorders. This study developed and validated a new semistructured interview, the Eating Disorders Assessment for DSM‐5 (EDA‐5).MethodTwo studies evaluated the utility of the EDA‐5. Study 1 compared the diagnostic validity of the EDA‐5 with the Eating Disorder Examination (EDE) and evaluated the test–retest reliability of the new measure. Study 2 compared the diagnostic validity of an EDA‐5 electronic application (“App”) with clinician interview and self‐reported assessments.ResultsIn Study 1, the kappa for EDE and EDA‐5 eating disorder diagnoses was 0.74 across all diagnoses (n = 64), with a range of κ = 0.65 for other specified feeding or eating disorder/unspecified feeding or eating disorder to κ = 0.90 for binge eating disorder. The EDA‐5 test–retest kappa coefficient was 0.87 across diagnoses. For Study 2, clinical interview versus App conditions revealed a kappa of 0.83 for all eating disorder diagnoses (n = 71). Across individual diagnostic categories, kappas ranged from 0.56 for other specified feeding or eating disorder/unspecified feeding or eating disorder to 0.94 for BN.DiscussionHigh rates of agreement were found between diagnoses by EDA‐5 and the EDE, and EDA‐5 and clinical interviews. Because this study supports the validity of the EDA‐5 to generate DSM‐5 eating disorders and the reliability of these diagnoses, the EDA‐5 may be an option for the assessment of anorexia nervosa, bulimia nervosa, and binge eating disorder. Additional research is needed to evaluate the utility of the EDA‐5 in assessing DSM‐5 feeding disorders. © 2015 Wiley Periodicals, Inc. (Int J Eat Disord 2015; 48:452–463)
Sexually selected UV signals in the tropical ornate jumping spider, Cosmophasis umbratica may incur costs from predation
Authors: Bulbert Matthew W. , O'Hanlon James C. , Zappettini Shane , Zhang Shichang , Li Daiqin 
Published: January 2015

AbstractSexually selected ornaments and signals are costly to maintain if they are maladaptive in nonreproductive contexts. The jumping spider Cosmophasis umbratica exhibits distinct sexual dichromatism with males displaying elaborate UV body markings that signal male quality. Female C. umbratica respond favorably to UV‐reflecting males and ignore males that have their UV masked. However, Portia labiata, a UV‐sensitive spider‐eating specialist and a natural predator of C. umbratica, is known to use UV reflectance as a cue when hunting prey. We investigated the cost of these UV signals in C. umbratica in terms of their predation risk. Under experimental conditions, three choice scenarios were presented to P. labiata individuals. Choices by P. labiata were made between male C. umbratica with and without the UV signal; a UV‐reflecting male and non‐UV‐reflecting female; and a UV‐masked male and female. The presence and absence of UV signals was manipulated using an optical filter. Portia labiata exhibited a strong bias toward UV+ individuals. These results suggest the sexually selected trait of UV reflectance increases the visibility of males to UV‐sensitive predators. The extent of this male‐specific UV signal then is potentially moderated by predation pressure. Interestingly though, P. labiata still preferred males to females irrespective of whether UV reflectance was present or not. This suggests P. labiata can switch cues when conditions to detect UV reflectance are not optimal.
Transistor Application of Phenacene Molecules and Their Characteristics
Authors: Kubozono Yoshihiro , He Xuexia , Hamao Shino , Teranishi Kazuya , Goto Hidenori , Eguchi Ritsuko , Kambe Takashi , Gohda Shin , Nishihara Yasushi 
Published: January 2015

AbstractThe characteristics of field‐effect transistors (FETs) fabricated from thin films and single crystals of phenacene molecules are fully reported in this review together with the electronic and crystal structures of phenacenes. Phenacene molecules possess a low HOMO level and a wide band gap. The highest mobility observed in the phenacene thin‐film FETs is 7.4 cm2 V–1 s–1 for [6]phenacene, and in single‐crystal FETs the highest value is 6.3 cm2 V–1 s–1 for [7]phenacene. The phenacene thin‐film FETs show O2‐sensing properties unlike their single‐crystal FETs. The bias‐stress effect is fully investigated for phenacene single‐crystal FETs. Furthermore, the low‐voltage operation of phenacene single‐crystal FETs with electric‐double‐layer (EDL) capacitors is reported. The temperature dependence of phenacene single‐crystal FETs is reported to clarify the transport mechanism, which is suggestive of band‐like transport.
Showing Good Conduct
Authors: Vashi Preeti 
Published: January 2015

AbstractThe highly topical field of Molecular Conductors is the subject of this cluster issue of EurJIC. Guest Editors Lahcène Ouahab and Takehiko Mori offer a collection of papers reflecting some of the latest stimulating developments in this field from leading researchers, especially from the viewpoint of inorganic chemistry. The Essay by Professor Gunzi Saito introduces the reader into the world of multifunctional conducting molecular materials.
Synthesis, Crystal Structures, and Magnetic Properties of Heterodimetallic RuIII–3d Coordination Compounds Based on a Meridional Tricyanoruthenium(III) Building Block
Authors: Xiang Jing , Jia Li‐Hui , Wang Hui‐Sheng , Peng Shie‐Ming , Gao Song , Lau Tai‐Chu 
Published: January 2015

AbstractThe synthesis, crystal structures, and magnetic properties of three cyano‐bridged heterodimetallic compounds prepared from the paramagnetic RuIII building block mer‐[RuIII(CN‐sap)(CN)3]2– (1) are described. Complex 1 reacts with [MnII(LN5)(Cl)(H2O)]Cl and [MnII(bipy)2(Cl)2] (bipy = bipyridine) to produce the 1D zigzag chain {[RuIII(CN‐sap)(CN)](μ‐CN)2[MnII(LN5)]·3MeOH}n {2; LN5 = 2,13‐dimethyl‐3,6,9,12,18‐pentaazabicyclo[12.3.1]octadeca‐1(18),2,12,14,16‐pentaene, CN‐sapH2 = 2‐hydroxy‐N‐(2‐hydroxyphenyl)benzimidoyl cyanide} and the octanuclear compound {[RuIII(CN‐sap)(CN)](μ‐CN)2[MnII(bipy)(MeOH)][RuIII(CN‐sap)](μ‐CN)3[MnII(bipy)2]}2·8MeOH (3), respectively. The MnII centers have a pentagonal‐bipyramidal environment in 2 and a distorted octahedral environment in 3. Complex 1 reacts with [NiII(cyclen)(Cl)2] (cyclen = 1,4,7,10‐tetraazacyclododecane) in MeOH to produce the molecular square {[RuIII(CN‐sap)(CN)](μ‐CN)2[NiII(cyclen)]}2·8MeOH (4). Compounds 2 and 3 exhibit antiferromagnetic coupling between the RuIII and MnII centers, whereas 4 exhibits ferromagnetic coupling between the RuIII and NiII centers through the cyano bridges.
Copper(II) Complexes of 2,2′:6′,2″‐Terpyridine Derivatives for Catalytic Aerobic Alcohol Oxidations – Observation of Mixed‐Valence CuICuII Assembles
Authors: Zhang Guoqi , Liu E , Yang Chengxiong , Li Li , Golen James A. , Rheingold Arnold L. 
Published: January 2015

AbstractThe reactions of copper(II) salts with simple terpyridine (tpy) ligands gave mononuclear monoligand complexes 1–3, of which two new structures have been characterized by X‐ray crystallography. These complexes were applied as catalysts for the oxidation of benzylic alcohol to benzaldehyde in air in the presence of the radical 2,2,6,6‐tetramethylpiperidinyl‐1‐oxyl (TEMPO). Copper complexes 1 and 2 are efficient catalysts for the reactions in water at 70 °C with 4‐dimethylaminopyridine (DMAP) as an extra base. The influence of TEMPO on the formation of new reactive intermediates during the catalytic reactions was tentatively investigated by introducing TEMPO into the reaction solutions of tpy derivatives with copper dichloride. Two new complexes with interesting solid‐state structures resulting from these reactions have been isolated and characterized. The coordination reactions in the presence of TEMPO led to new mixed‐valence CuICuII supramolecular assembles (4 and 5), although they adopt either discrete complex or 1D polymeric structures. Further catalytic studies indicated that the mixed‐valence assembles 4 and 5 displayed higher catalytic activity than those of the mononuclear complexes under milder conditions. The relationship between the molecular structures of diverse copper complexes and their reactivity is discussed on the basis of the results obtained.
Soft compartmentalization: Combining droplet‐based microfluidics with freely accessible cells
Authors: Eicher Dominic , Ramanathan Nirupama , Merten Christoph A. 
Published: January 2015

Droplet‐based microfluidics allows the generation and manipulation of many independent microreactors (pico‐ to nanoliter volumes) optionally hosting human cells. However, one limitation is that mammalian cells within droplets are not fully accessible from outside. The contents of the plugs cannot be completely exchanged so that washing steps for immunoassays are not possible. Additionally, imaging of cells is difficult because cells move within the volume of the plugs. Here, we present an approach in which droplets are used for the specific delivery of compounds across a 150 μm thick polydimethylsiloxane (PDMS) membrane to cells grown on the opposite side of this thin membrane, resulting in spatially separated, parallelizable assays. As a first application, we used this setup to compartmentalize tetracycline within droplets and incubating them in a long channel for 16 h, after which the plugs were flushed out of the channels. Tetracycline diffused into the PDMS membrane and induced the expression of green fluorescent protein in HeLa cells within a large, freely accessible population in a pattern corresponding to the original positions of tetracycline droplets. This should allow the combination of droplet‐based microfluidics with cell‐based assays requiring long incubation times, studies of cell–cell interactions, and chemotaxis.
Resource allocation and power control based on user grouping for underlay device‐to‐device communications in cellular networks
Authors: Dinh‐Van Son , Shin Yoan , Shin Oh‐Soon 
Published: January 2015

AbstractDevice‐to‐device (D2D) communications have emerged as a promising solution that can enable new wireless local services and can enhance the performance of wireless services in cellular networks. However, D2D links in a cellular network are difficult to establish because of mutual interference between cellular and D2D transmissions. Hence, it is of primary importance to devise a radio resource allocation scheme that can maximise the spectrum utilisation and at the same time minimise the impact of interference. In this article, we propose a novel resource allocation method for D2D communications underlaying cellular networks. The proposed method divides D2D pairs into several groups and allows spatially separated D2D users to belong to the same group so that they can exploit the same resource. An appropriate cellular device is selected to share its uplink resources with the D2D pairs in each group in such a way that an adequate signal‐to‐interference‐plus‐noise ratio for both cellular and D2D links can be guaranteed. We also propose a power control strategy for D2D links in order to maximise the number of D2D pairs that can be served. Copyright © 2015 John Wiley & Sons, Ltd.
Location‐based information transmission systems using visible light communications
Authors: Ho Siu‐Wai , Duan Jialong , Chen Chung Shue 
Published: January 2015

AbstractLighting systems are undergoing a revolution from fluorescent lamps or tubes to light emitting diodes that offer greater energy efficiency and a longer lifetime. This paper considers using these light sources to provide other benefits. The proposed system has low deployment cost and most importantly, it uses the unique characteristics of visible light to complement existing wireless communication systems. This paper outlines a system design with three features. First, it can provide a provable and secure wireless communication capability. In particular, a user is authenticated according to his or her location. Second, it includes indoor positioning systems with high precision. Finally, it also supports information broadcast with a high frequency reuse factor. This paper provides both experimental and theoretical results. We build the mathematical framework for the analysis of visible light positioning systems. Experimental results and analysis are given to explain the concerns of light sensors in a mobile phone for building an indoor positioning system. A novel authentication system based on users' locations is proposed. Copyright © 2015 John Wiley & Sons, Ltd.