bluuebunny/crossref_metadata_2025_split huggingface dataset:
OFF‐ON‐OFF Red‐Emitting Fluorescent Indicators for a Narrow pH Window
Authors: Cidlina Antonin , Miletin Miroslav , Fathi‐Rasekh Mahtab , Nemykin Victor N. , Zimcik Petr , Novakova Veronika 
Published: November 2016

AbstractA unique combination of two independent mechanisms of fluorescence quenching, namely intramolecular charge transfer (ICT) from a peripheral donor and protonation of azomethine nitrogen atoms in zinc tetrapyrazinoporphyrazines (TPyzPz), provides a new possibility for sensing pH in a specific range. The pH selectivity was controlled by the different basicities of the donor for ICT (dimethylaminoaryl), which was connected to the macrocycle by π‐extended linkers of different lengths. ICT and protonation have been studied in detail by photophysical, spectral (UV/Vis and MCD spectra), and electrochemical measurements, and further supported by theoretical calculations (DFT, TDDFT). The pH‐sensing properties of the TPyzPzs have been investigated in THF and in water after anchoring the TPyzPzs to liposomes. The salient pKa values were around 1.3 (azomethine nitrogen) and 2.29–4.76 (donor for ICT). The lead indicators (sensing over a pH range of 1.0–2.5) with fairly steep sensing profiles exhibited increases in fluorescence between the OFF/ON states of more than 20‐fold and strong absorption in the red region (Q‐band maximum >650 nm, ϵ≈2×106 m−1 cm−1).
A 1D Coordination Polymer of UF5 with HCN as a Ligand
Authors: Scheibe Benjamin , Rudel Stefan S. , Buchner Magnus R. , Karttunen Antti J. , Kraus Florian 
Published: November 2016

Abstractβ‐Uranium(V) fluoride was reacted with liquid anhydrous hydrogen cyanide to obtain a 1D coordination polymer with the composition
[UF5(HCN)2],
[UF4/1F2/2‐ (HCN)2/1], revealed by single‐crystal X‐ray structure determination. The reaction system was furthermore studied by means of vibrational and NMR spectroscopy, as well as by quantum chemical calculations. The compound presents the first described polymeric HCN Lewis adduct and the first HCN adduct of a uranium fluoride.
ChemInform Abstract: BiFSeO3: An Excellent SHG Material Designed by Aliovalent Substitution.
Authors: Liang Ming‐Li , Hu Chun‐Li , Kong Fang , Mao Jiang‐Gao 
Published: November 2016

AbstractSingle crystals of the title compound are prepared by hydrothermal reaction of a 1:5 molar mixture of Bi2O3 and SeO2 in 40% aq.
ChemInform Abstract: Titanium‐Substituted Polyoxotantalate Clusters Exhibiting Wide pH Stabilities: [Ti2Ta8O28]8‐ and [Ti12Ta6O44]10‐.
Authors: Son Jung‐Ho , Casey William H. 
Published: November 2016

Abstract(Me4N)8 [Ti2Ta8O28]·21H2O (I) and (Me4N)10 [Ti12Ta6O44]·39H2O (II) are prepared in 53% and 17% yield, resp., by hydrothermal reaction of aqueous solutions of Me4NOH, Ti(iPrO)4, and Ta2O5·xH2O (140 resp.
ChemInform Abstract: Directed Alkynylation of Unactivated C(sp3)—H Bonds with Ethynylbenziodoxolones Mediated by DTBP.
Authors: Cheng Zhi‐Fei , Feng Yi‐Si , Rong Chun , Xu Tao , Wang Peng‐Fei , Xu Jun , Dai Jian‐Jun , Xu Hua‐Jian 
Published: November 2016

AbstractThe method is general and efficient for the synthesis of alkyl‐substituted alkynes under mild reaction conditions without any metal catalyst.
ChemInform Abstract: Coumarin Based Novel Ligands in the Suzuki—Miyaura and Mizoroki—Heck Cross‐Couplings under Aqueous Medium.
Authors: Waheed Mohammed , Ahmed Naseem 
Published: November 2016

AbstractNovel coumarin‐based ionic ligands are synthesized from 4‐hydroxycoumarin, aromatic aldehydes, and diethylamine.
ChemInform Abstract: Potent Triazine‐Based Dehydrocondensing Reagents Substituted by an Amido Group.
Authors: Kunishima Munetaka , Kato Daiki , Kimura Nobu , Kitamura Masanori , Yamada Kohei , Hioki Kazuhito 
Published: November 2016

AbstractFour title reagents are synthesized, e.
ChemInform Abstract: Iron‐Catalyzed Trifluoromethylation of Vinylcyclopropanes: Facile Synthesis of CF3—Containing Dihydronaphthalene Derivatives.
Authors: Li Zong‐Rui , Bao Xing‐Xing , Sun Jian , Shen Jing , Wu Dun‐Qi , Liu Yan‐Kai , Deng Qing‐Hai , Liu Feng 
Published: November 2016

AbstractIn an initial step, a catalytically generated CF3 radical reacts with the vinylcyclopropane which undergoes a ring‐opening followed by a so far incompletely understood intramolecular cyclization process leading to dihydronaphthalene derivatives.
ChemInform Abstract: Tritylation of Alcohols under Mild Conditions Without Using Silver Salts.
Authors: Shahsavari Shahien , Chen Jinsen , Wigstrom Travis , Gooding James , Gauronskas Alexander , Fang Shiyue 
Published: November 2016

AbstractThe most significant advantage of this tritylation method is the capability to tritylate secondary alcohols under mild conditions without using expensive silver salts.
ChemInform Abstract: Advances and Mechanistic Insight on the Catalytic Mitsunobu Reaction Using Recyclable Azo Reagents.
Authors: Hirose Daisuke , Gazvoda Martin , Kosmrlj Janez , Taniguchi Tsuyoshi 
Published: November 2016

AbstractEthyl 2‐arylazocarboxylates are described as useful Mitsunobu reagents applied in catalytic amounts only.
ChemInform Abstract: A Mild Strategy for the Preparation of Phenols via the Ligand‐Free Copper‐Catalyzed O‐Arylation of para‐Toluenesulfonic Acid.
Authors: Tan Bryn Yong‐Hao , Teo Yong‐Chua 
Published: November 2016

AbstractThe one‐pot O‐arylation of TosOH with aryl iodides (I) and subsequent basic hydrolysis of intermediate sulfonates gives rise to the desired phenols (II).
ChemInform Abstract: Indium‐Mediated Blaise‐Type Reaction of Bromomalonates with Nitriles and Isocyanates.
Authors: Babaoglu Emre , Harms Klaus , Hilt Gerhard 
Published: November 2016

AbstractThe In‐mediated reaction of bromomalonate (I) with nitriles (II) gives rise to β‐amino diesters (III), whilst the reaction with isocyanates (IV) affords carbamoyl malonates (V).
ChemInform Abstract: Copper‐Catalyzed Reductive N‐Alkylation of Amides with N‐Tosylhydrazones Derived from Ketones.
Authors: Xu Peng , Qi Fu‐Ling , Han Fu‐She , Wang Yan‐Hua 
Published: November 2016

AbstractThe optimized conditions render possible an access to a broad spectrum of the desired amide components.
ChemInform Abstract: Synthesis of Sulfonamides via Copper‐Catalyzed Oxidative C—N Bond Cleavage of Tertiary Amines.
Authors: Ji Jing , Liu Zhengyi , Liu Ping , Sun Peipei 
Published: November 2016

AbstractA coupling reaction of sulfonyl chlorides with tertiary amines affords N,N‐disubstituted sulfonamides in moderate to good yields.
ChemInform Abstract: A General Route to Sulfones via Insertion of Sulfur Dioxide Promoted by Cobalt Oxide.
Authors: Zheng Danqing , Chen Mo , Yao Liangqing , Wu Jie 
Published: November 2016

AbstractA facile route to sulfones via a cobalt(II) oxide‐promoted three‐component reaction of triethoxysilanes, sulfur dioxide, and different kinds of electrophiles is developed.
ChemInform Abstract: A General, Highly Enantioselective Michael Addition of Nitroalkanes to α,β‐Unsaturated Enones Catalyzed by 9‐Amino(9‐deoxy)‐epi‐quinine: A Remarkable Additive Effect.
Authors: Liu Siyang , Wang Qingqing , Ye Ling , Shi Zhichuan , Zhao Zhigang , Yang Xuejun , Ding Keyi , Li Xuefeng 
Published: November 2016

AbstractThe protocol allows for the transformation of a broad range of enones, such as cinnamone derivatives, cyclic enones and chalcones including heterocyclic derivatives.
ChemInform Abstract: Copper‐Catalyzed Formal [2 + 2 + 1] Heteroannulation of Alkenes, Alkylnitriles, and Water: Method Development and Application to a Total Synthesis of (.+‐.)‐Sacidumlignan D.
Authors: Ha Tu M. , Chatalova‐Sazepin Claire , Wang Qian , Zhu Jieping 
Published: November 2016

AbstractThe utility of this method is demonstrated in the synthesis of rac‐sacidumlignan D (XIX).
ChemInform Abstract: A Convenient Synthesis of Some New 1,3,4‐Thiadiazoles, Thiazoles, Pyrazolo[1,5‐a]pyrimidines, Pyrazolo[5,1‐c]triazine, and Thieno[3,2‐d]pyrimidines Containing 5‐Bromobenzofuran Moiety.
Authors: Abdelhamid Abdou O. , Fahmi Abdelgawad A. , Baaiu Basma S. 
Published: November 2016

AbstractThe title compounds are prepared from brominated benzofuran (I) using standard procedures.
ChemInform Abstract: Fe3O4 Nanoparticles as an Efficient and Reusable Catalyst for the Solvent‐Free Synthesis of 1H‐Indole and 1H‐Pyrrole Derivatives.
Authors: Babaei Seyyed Ebrahim , Hossaini Zinatossadat , Besheli Reza Ramezani , Tavakkoli Vahid 
Published: November 2016

AbstractAdvantages of the employed method are clean reaction with high yields in short reaction time and easy purification.
ChemInform Abstract: Palladium‐Catalyzed Oxidative Cyclization for the Synthesis of Indolyl/Pyrrolyl 3‐Phosphonates.
Authors: Mishra Aniket , Deb Indubhusan 
Published: November 2016

AbstractMixtures of imino‐/enaminophosphonates are subjected to oxidative cyclization conditions under PdCl2 catalysis to afford highly functionalized indole or pyrrole cores.
ChemInform Abstract: Domino Reactions of Cyclic Enaminones Leading to Selective Synthesis of Pentacyclic Indoles and Its Functionalization.
Authors: Fan Wei , Li Yan‐Rong , Li Qun , Jiang Bo , Li Guigen 
Published: November 2016

AbstractMulticomponent, one‐pot cyclization reactions of 3‐aminocyclohex‐2‐enones with acenaphthoquinone in anhydride solution provide pentacyclic indoles under mild conditions with short reaction times.
ChemInform Abstract: Basic Ionic Liquid as Catalyst and Reaction Media for the One‐Pot Three‐Component Regioselective Synthesis of Various Thiazol‐2‐imine Derivatives.
Authors: Shiran Jafar Abbasi , Yahyazadeh Asieh , Yamin Bohari M. , Mamaghani Manouchehr , Albadi Jalal 
Published: November 2016

AbstractThe catalyst‐free condensation reaction between alkylisothiocyanates, α‐haloketones and aryl amines delivers the products in often very high yields.
ChemInform Abstract: Metal‐Free Route for the Synthesis of 4‐Acyl‐1,2,3‐triazoles from Readily Available Building Blocks.
Authors: Thomas Joice , Goyvaerts Vince , Liekens Sandra , Dehaen Wim 
Published: November 2016

AbstractStarting from a variety of compounds having activated methyl groups, such as ketones, a straightforward method for the synthesis of 1,4‐disubstituted 1,2,3‐triazoles is developed.
ChemInform Abstract: Chemoselective Synthesis of Enamino‐Coumarin Derivatives Identified as Potent Antitumor Agents.
Authors: Ibrahim Mona E. , Hamama Wafaa S. , Metwalli Asmaa E. , Zoorob Hanafi H. 
Published: November 2016

AbstractStarting from 4‐aminocoumarin (I), various coumarine derivatives are synthesized by standard procedures.
ChemInform Abstract: Synthesis of Chiral Piperazines via Hydrogenation of Pyrazines Activated by Alkyl Halides.
Authors: Huang Wen‐Xue , Liu Lian‐Jin , Wu Bo , Feng Guang‐Shou , Wang Baomin , Zhou Yong‐Gui 
Published: November 2016

AbstractThorough adjustment of the hydrogen pressure and the ligands allows for the preparation of 3‐substituted, 3,5‐ as well as 2,3‐disubstituted pyrazines from the corresponding pyrazine salts.
ChemInform Abstract: One‐Pot Regio‐ and Stereoselective Synthesis of Tertiary Phosphine Chalcogenides with (E)‐N‐Ethenyl‐1,2‐dihydroquinoline Functionalities.
Authors: Gusarova Nina K. , Volkov Pavel A. , Ivanova Nina I. , Khrapova Kseniya O. , Albanov Alexander I. , Afonin Andrei V. , Borodina Tatyana N. , Trofimov Boris A. 
Published: November 2016

AbstractThe synthesis of the title compounds via three‐component reaction between secondary phosphine chalcogenides quinoline or isoquinoline and alkyl propiolates or acetylene dicarboxylate is reported.
ChemInform Abstract: New Compounds from the Roots and Stems of Trigonostemon lii and Their Cytotoxic Activities.
Authors: Liu Yong‐Qin , Di Ying‐Tong , Wang Yue‐Hu , Hao Xiao‐Jiang , Hu Xu‐Jia 
Published: November 2016

AbstractA new carboline alkaloid, Trifiline D (I), and a new degraded diterpenoid, Trigoxyphin X (II), are isolated from the title plant.
ChemInform Abstract: Diels—Alder Approaches for the Synthesis of Bridged Bicyclic Systems: Synthetic Applications of (7‐Hetero)norbornadienes
Authors: Moreno‐Clavijo Elena , Carmona Ana T. , Robina Inmaculada , Moreno‐Vargas Antonio J. 
Published: November 2016

AbstractReview: approaches used in the last ten years for the synthesis of (7‐hetero)norbornadenes and their synthetic applications
A new outsourcing conditional proxy re‐encryption suitable for mobile cloud environment
Authors: Son Junggab , Kim Donghyun , Bhuiyan Md Zakirul Alam , Hussain Rasheed , Oh Heekuck 
Published: November 2016

SummaryThe mobile cloud is a highly heterogenous and constantly evolving network of numerous portable devices utilizing the powerful back‐end cloud infrastructure to overcome their severe deficiency in computing resource and offer various services such as data sharing. Inherently, in mobile cloud, the risk of user privacy invasion by the cloud operator is high. The conditional proxy re‐encryption (CPRE) is a useful concept for secure group data sharing via cloud while preserving the privacy of the shared data from any unintended third parties including the cloud operator. Unfortunately, the state‐of‐art CPRE is not particularly designed for mobile cloud environment and therefore imposes heavy burdens to the weak mobile cloud clients. This paper introduces a new CPRE scheme, namely the CPRE for mobile cloud, which utilizes the back‐end cloud to the extreme extent so that the overhead of terminals is drastically reduced. Specifically, our scheme outsources a significant amount of computation overhead caused by the following functions at terminals: (a) re‐encryption key generation, (b) condition value change, and (c) decryption, to the cloud. The proposed scheme also allows users to verify the correctness of outsourced computation under refereed delegation of computation model. Our simulation results show CPRE for mobile cloud that outperforms its existing alternatives. Copyright © 2016 John Wiley & Sons, Ltd.
Dopant‐Catalyzed Singlet Exciton Fission
Authors: Snamina Mateusz , Petelenz Piotr 
Published: November 2016

AbstractIn acene‐based molecular crystals, singlet exciton fission occurs through superexchange mediated by two virtual charge‐transfer states. Hence, it is sensitive to their energies, which depend on the local environment. The crucial point is the balance between the charge–quadrupole interactions within the pair of molecules directly involved in the process and those with the surrounding crystal matrix, which are governed by local symmetry and may be influenced by breaking this symmetry. This happens, for example, in the vicinity of a vacancy or an impurity and in the latter case is complemented by polarization energy and potentially by dipolar contributions. Our model calculations indicate that the superexchange coupling is sensitive enough to these factors to enable fission to be catalyzed by judiciously designed dopant molecules. In favorable cases, dipolar dopants are expected to increase the fission rate by an order of magnitude.
Frequency Tuning Range Expansion for the Millimeter‐Wave Band Tunable Filter
Authors: KAWAMURA TAKASHI , OTANI AKIHITO 
Published: November 2016

SUMMARYFor the realization of the smart community, the Internet of Things (IoT) and sensor technology in the millimeter‐wave band is necessary. The development of these technologies requires accurate spectrum analysis in the frequency domain over 100 GHz. A tunable preselection filter is a key device in building such a spectrum analyzer. In this paper, we propose use of a ridge waveguide to achieve frequency tuning over a wider bandwidth. In addition, we demonstrate an example design and prototype for a filter with a relative bandwidth of 38% (75 GHz to 110 GHz) and 32% (78.1 GHz to 107.5 GHz), respectively.
Pressure Rises Due to Arc Under Insulating Oil in Closed Vessel—Relationship between Bubble Behavior and Pressure Rises
Authors: TADOKORO TOMO , KOTARI MASASHI , OHTAKA TOSHIYA , IWATA MIKIMASA , AMAKAWA TADASHI 
Published: November 2016

SUMMARYWhen a fault arc occurs in oil‐filled electric power equipment such as transformers in transmission and distribution systems, it generates a flammable gas and a dynamic pressure rise that may trigger an explosion. The purpose of this fundamental study is to investigate the effects of the arc under electrical insulation oil on pressure rises in a closed vessel containing air and oil. In particular, this paper is intended to investigate the relationship between the pressure rises and the generated bubble behavior by the arc. The pressure rises in both air and oil are measured under experimental conditions involving an arc current ranging from 2.3 kA to 8.9 kA, an arc duration of 10 ms or 100 ms. Experimental results show that the behavior of a bubble affects the pressure rises in the air and the oil as low‐frequency pressure oscillation comparatively.
A mechanism of self‐organization in a desert with phytogenic mounds
Authors: Quets Jan J. , El‐Bana Magdy I. , Al‐Rowaily Saud L. , Assaeed Abdulaziz M. , Temmerman Stijn , Nijs Ivan 
Published: November 2016

AbstractPhytogenic mounds or nebkhas are formed by spatially isolated burial‐tolerant plants, which have been trapping windborne sediment within their canopies. They occur in drylands all over the world, and nebkha landscapes are considered intermediate between stable grasslands and unstable deserts with mobile dunes. Depending on the previous state of the landscape, they can thus be viewed both as indicators of desertification and as signs of stabilization. While individual nebkha mounds have been studied extensively, little is known about the organization of nebkha landscapes. In this study, we collected spatiotemporal data of vegetation and topography from four self‐made remotely sensed maps, created over a three‐year period from a study site in central Saudi Arabia dominated by the nebkha‐forming shrub Rhazya stricta Decne. Using logistic regressions and t tests, we found that the nebkha shrubs grow in topographic depressions, while they shrink on topographic highs and in locations with high nebkha densities. We propose that this spatial variation in nebkha growth is driven by water availability, as the few extreme rain events that typically make up the bulk of precipitation in deserts would spatially redistribute to topographic lows, and as nebkha density would positively correlate with competition for water. Our data suggest a novel mechanism of biogeomorphological self‐organization in deserts. The observed nebkha growth in depressions would lead to increased sedimentation on and in between the nebkhas owing to reduced wind speed, which after a time lag might transform depressions into topographic highs on which nebkhas tend to shrink because of water shortage. Shrinking nebkhas, in turn, could provoke soil erosion, on as well as in between the nebkha mounds, which may ultimately transform topographic highs into depressions, thereby closing the cycle of self‐organization.
Temporal patterns in innate immunity parameters in reef‐building corals and linkages with local climatic conditions
Authors: van de Water Jeroen A. J. M. , Lamb Joleah B. , Heron Scott F. , van Oppen Madeleine J. H. , Willis Bette L. 
Published: November 2016

AbstractExtremes in seasonal environmental conditions can significantly impact the health and physiological functioning of reef corals, underscoring the need for knowledge of seasonally specific baselines from which to monitor and forecast impending stress. Increases above summertime means in seawater temperature, sunlight intensity, turbidity, or sedimentation may reduce coral immunocompetency and increase disease and bleaching susceptibility. We analyzed temporal patterns in innate immunity parameters over nine time points throughout one year to establish baseline levels from which anomalies might be detected for representative species from three major reef‐building coral families (Acroporidae, Faviidae, and Poritidae). Temporal patterns in both phenoloxidase activity and expression of green fluorescent protein‐like proteins varied among the three families, as did overall constitutive levels. For example, Porites cylindrica had 2.8‐fold higher yearly average levels of phenoloxidase activity than Acropora millepora, which had the lowest levels. In contrast, mean fluorescence was lowest in Acropora millepora and highest in Echinopora mammiformis. Relationships between the potential physical drivers (seasonal variation in seawater temperature, rainfall, salinity) and temporal patterns in these parameters also differed among the three species. For example, phenoloxidase activity was positively correlated with seawater temperature in A. millepora, but negatively correlated in both E. mammiformis and P. cylindrica. Distinctions in constitutive levels and temporal patterns in these parameters among species suggest that corals from these three families have evolved different strategies for investing resources into innate immune parameters. Such differences highlight the need for species‐specific baselines and long‐term assessments to accurately predict coral reef trajectories in rapidly changing environments.
Habitat degradation increases functional originality in highly diverse coral reef fish assemblages
Authors: Brandl Simon J. , Emslie Michael J. , Ceccarelli Daniela M. , T. Richards Zoe 
Published: November 2016

AbstractAs anthropogenic and natural disturbances intensify, there is mounting concern about the loss of functionally important or unique species. Functional redundancy, or the presence of several different species occupying similar functional niches, can provide insurance against diversity loss, but evidence for this effect is rare. Likewise, the ways in which functional redundancy patterns respond to disturbances are poorly known, impeding a thorough understanding of community‐level dynamics post disturbance. Here, we use an extensive reduction of hard coral cover following a tropical cyclone to explore the response of a highly diverse reef fish assemblage to habitat degradation. We demonstrate that despite clear trait value‐specific susceptibility of fishes to the disturbance, five of six functional indices (including functional richness and evenness) showed no relationship with habitat degradation. In contrast, functional originality, which quantifies the average functional uniqueness of species within an assemblage, increased post disturbance, exhibiting a negative, albeit weak, relationship with decreasing coral cover. The increase in functional originality is simultaneously driven by the loss of functionally similar species in susceptible groups (predominantly small planktivorous and omnivorous species that associate with live coral habitat) and the addition of functionally unique species in groups that benefit from the disturbance (large, non‐territorial species feeding on algal turfs, detritus, and invertebrates). Our findings suggest that coral reefs with high coral cover can foster fish assemblages with low functional originality (i.e., high functional redundancy), therefore preventing detectible changes in some of the most commonly applied functional indices post disturbance. However, we caution that the limited resolution of trait‐based approaches may mask the loss of functionally unique species and that, with an increase in functional originality, post disturbance assemblages may be less suited to adequately maintain certain ecosystem functions in the face of future disturbances. Thus, there is an urgent need for further exploration of the dynamics between disturbances, functional redundancy, and ecosystem functioning.