bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Confined Spaces in the Catalytic Activity of 1D and 2D Heterogeneous Carbon‐Based Catalysts for Synthesis of 1,3,5‐Triarylbenzenes: RGO‐SO3H vs. MWCNTs‐SO3H
Authors: Golestanzadeh Mohsen , Naeimi Hossein 
Published: February 2019

AbstractOne hot debate between catalytic activities of sulfonated reduced graphene oxide (RGO‐SO3H), as the 2D heterogeneous carbon‐based catalyst, and sulfonated multi‐walled carbon nanotubes (MWCNTs‐SO3H), as the 1D heterogeneous carbon‐based catalyst, was investigated in the synthesis of 1,3,5‐triarylbenzenes under different conditions. This comparison study revealed that the 2D catalytic system was more efficient relative to the 1D catalyst in terms of yields of the target products, turnover frequency of the catalyst (TOF), and the reusability. The reasons of this observation such as specific surface area, confinement spaces in 1D and 2D carbon‐based catalysts, solvent accessible surface area, surface active sites, and the availability of supported functional groups on carbon nanostructures will discuss. Moreover, the application of synthesized compounds as a substrate was checked in carbon‐carbon bond formation. Also, one of the synthesized compounds was produced using three approaches under metal and non‐metal conditions. Notably, the recyclability of the two catalytic systems was checked.
Metal Telluride Nanomaterials: Facile Synthesis, Properties and Applications for Third Generation Devices.
Authors: Jamwal Deepika , Mehta Surinder Kumar 
Published: February 2019

AbstractFrom the material science community, metal telluride semiconductor nanostructures have lately attracted a significant quantity of attention. On account of physics associated in quantum confinement, remarkable surface chemistry metal telluride became the most explored group of semiconductor nanomaterials. The intensive concern in this area originates from their exceptional optical, chemical and electronic properties which give rise to their potential use in the field of solar energy conversion, nonlinear optics, catalysis, thermoelectric and magnetic, as well as other areas. In the current review, shape and size‐controlled synthesis strategies, substantial properties and some selected applications for metal telluride nanostructures are highlighted, for the synthesis of nanoparticles each method is favourably analyzed.
Nucleobase Soft Metallogel Composites with Antifouling Activities against ESKAPE Pathogens
Authors: Pratibha  , Shukla Manjulika , Kaul Grace , Chopra Sidharth , Verma Sandeep 
Published: February 2019

AbstractMicrobial infections pose a global threat and present a major challenge to public health and welfare. Specifically, ESKAPE pathogens are the primary cause of nosocomial infections, which wreak morbidity and mortality in immune‐compromised patients, with a potential threat of antibiotic resistance. Consequently, there is an ever‐increasing impetus to discover newer inhibitors of these pathogenic strains. Herein, we report activities of bis‐purine silver gel‐like composites, 1/PEG, 2/PEG, 3/PEG, 1/PCL, and 2/PCL, possessing antimicrobial activities against the ESKAPE pathogens. Composites 2/PEG and 3/PEG successfully inhibited Staphylococcus aureus initiated bacterial growth and biofilm formation on surface of interest.
Dinuclear Manganese Carbonyl Complexes: Electrocatalytic Reduction of Protons to Dihydrogen
Authors: Kaim Vishakha , Natarajan Mookan , Kaur‐Ghumaan Sandeep 
Published: February 2019

AbstractStudies on Mn complexes as electrocatalysts for proton reduction are limited. Mostly Mn complexes have been investigated for CO2 activation. Hence, hydrogen production by three Mn complexes [(Mn(CO)3(μ‐SN2C7H5))2] 1, [(Mn(CO)3(μ‐S2NC7H4))2] 3 and [Mn2(CO)7(μ‐S2NC7H4)2] 4 is reported in the paper. The complexes 1, 3 and 4 effectively catalyzed electrochemical proton reduction in CH3CN with trifluoroacetic acid (TFA) as the proton source. Complexes 1, 3 and 4 displayed turnover frequency (TOF / s−1) (overpotential, η / V) of 358 (0.83), 111 (0.79) and 102 (0.77), respectively for the catalytic process.
PhI(OAc)2‐Mediated One‐Pot Synthesis and their Antibacterial Activity of Flavone and Coumarin Based Isoxazoles Under Mild Reaction Conditions
Authors: Waheed Mohd , Ahmed Naseem , Alsharif Meshari A , Alahmdi Mohammed Issa , Mukhtar Sayeed 
Published: February 2019

AbstractA facile synthetic method of flavone and coumarin based isoxazoles, and tri‐substituted isoxazoles is reported using aromatic aldehydes, hydroxylamine hydrochloride and O‐propargyl flavones/coumarin, and internal acetylene via one‐pot condensation and subsequent [3+2] cycloaddition in the presence of phenyliodinediacetate (PIDA) under mild reaction conditions. This methodology is also successfully applied for O‐propargyl flavone containing heterocyclic ring such as furan and thiophene. One‐pot, high yields (90‐75%), shorter reaction time, easy work‐up and purification by recrystallization are the key advantages of our protocol. All synthesized compounds were tested for antibacterial activity, showed MICconcentration ≥ 1024μg/mL, and compared with standard drugs concentration. MICs data revealed high values against all tested antibiotics which were found in the range of 4 ≥ 4,096 μg mL−1.
Light Driven Water Oxidation Coupled With C‐N Coupling Reaction Using a Hybrid Cu‐PW12O40 Based Soft‐Oxometalate
Authors: Das Santu , Das Kousik , Kübel Christian , Roy Soumyajit 
Published: February 2019

AbstractInspired by photosynthesis, we have developed a system, which photochemically splits water to produce oxygen and protons and stores the released electron first in the metal oxide cluster followed by transfer to a Cu(II) centre to generate Cu(I) in situ in the reaction. Later the generated Cu(I) acts as an active catalyst for click reaction with a yield of up to 93% and for multi component coupling reaction to synthesize propargylamide with a yield of up to 87%.
Synthesis of Hierarchically Porous H[P, Al]‐ZSM‐5 and its Catalytic Performance in Coupling Transformation of Methanol with 1‐Butene
Authors: Tian Haifeng , Lv Jinlong , Liao Jiankang , Yu Lei , Tang Xiaohua , Zha Fei , Chang Yue 
Published: February 2019

AbstractHierarchically porous P substituted HZSM‐5 (H[P, Al]‐ZSM‐5‐AT‐0.05 M ) was successfully synthesized by isomorphous substitution method with introduced P atoms into ZSM‐5 zeolite frameworks followed by alkali treatment. H[P, Al]‐ZSM‐5‐AT‐0.05 M was characterized by XRD, ICP‐OES, SEM, FT‐IR, N2 adsorption‐desorption, NH3‐TPD, XPS, Py‐IR, and TG‐DTA, respectively. The surface area, pore volume, particle size and P/Al (molar ratio) are 328 m2.g−1, 0.23 cm3.g−1, 563 nm and 0.027, respectively. The catalytic performance of H[P, Al]‐ZSM‐5‐AT‐0.05 M in coupling reaction of methanol with 1‐butene was investigated in the fixed‐bed reactor. On the condition of reaction temperature at 500°C under atmosphere pressure, the main product is propylene with the selectivity and yield of 33.7% and 31.0%, respectively. Hydrogen transfer index was calculated to 0.24. Moreover, its diffusion limitation was investigated with the self‐etherification of benzyl alcohol reaction. The value of Thiele modulus (
) and effectiveness factor (
) are 0.08 and 16.9, respectively.
Biosynthesis of Copper Nanoparticles Supported on Zeolite Y and its Application in Catalytic C‐N Cross Coupling Reactions between Amines and Aryl halides
Authors: Raiza Anasdass Jaculin , Pandian Kannaiyan , Kumar Rajendran Ganesh 
Published: February 2019

AbstractA biosynthesis of Copper Nanoparticles supported on Zeolite Y and its application as efficient, reusable, heterogeneous catalyst in C−N cross coupling reactions between amines and aryl halides are reported. The biosynthesis of CuNPs/Zeolite Y was achieved by the reduction of CuSO4.5H2O with the lemon juice (without peal) and encapsulated into the Zeolite Y in a single step. In this biosynthetic method, the ascorbic acid present in the lemon juice acted as a reducing agent for CuSO4.5H2O. The CuNPs/Zeolite Y was characterized using UV‐Vis, powder XRD, FT‐IR, HR SEM, EDS and TGA. The average size of the CuNPs are found to be 50 nm and has large surface area for the efficient catalysis. The new catalyst is effect in catalyzing the C−N cross coupling reaction between amines and aryl halides (yield ranging from 89% to 95% depends on amine and aryl halide used). The catalyst can be recovered from the reaction mixture by simple procedure. The recovered catalyst is found to be active in catalyzing the coupling reaction even after five runs.
‐NO and ‐CN directed Metal Organic Ionic Framework used for Concentration Responsive Adsorption of Organic Pollutant, Bovine Serum Albumin and 2,2‐Diphenyl‐1‐Picrylhydrazyl
Authors: Ameta Rakesh K. , Singh Man 
Published: February 2019

AbstractWe describe the synthesis and characterization of Metal Organic Ionic Framework (MOIF) product of ionic association of [Fe(CN)6]4−/ [Fe(CN)6]3−/ [Fe(CN)5NO]2− and Cetylpyridinium ion via an ion exchange reaction in water. Raman and powder XRD measurements were used to characterize their structures. Simultaneous fitting of small angle X‐ray Scattering (SAXS) is performed in order to obtain an accurate description of the system. The anionic metal complex and Cetylpyridinium are strongly electrostatic bonded to each other those are investigated with UV/ Vis and FTIR spectra. Their dye, protein and free radical adsorption studies have revealed their importance in material research. The Langmuir isotherm has been used to estimate the interaction between adsorbate and adsorbent with the equilibrium isotherm; characteristics for the adsorption system. Ameta‐Nature‐Activity–Relationship model is proposed to understand the role of oxidation states and similarity and dissimilarity of ligands associated with central metal ion accounTable for strong and weaker adsorption.
Magnetically Recyclable Nano Nickel Ferrite Catalyzed One‐pot Chalcogenation of Bioactive Heterocycles Under Aerobic Condition
Authors: Das Dwaipayan , Mukherjee Prasun , Das Asish R. 
Published: February 2019

AbstractA practical ligand free Nano Nickel ferrite (NNF) catalysis has been established for the one pot direct sulfenylation of 4‐hydroxycoumarin, 4‐hydroxyquinolinone and pyrazolone derivatives by reacting them with several easily available aromatic iodides and elemental sulfur. Additionally, the protocol is highly facile for direct selenoetherification of 4‐hydroxycoumarin, 4‐hdroxyquinolinone scaffolds employing elemental selenium. The important aspects of this direct chalcogenation protocol are the use of easily recyclable nano Nickel ferrite catalyst, inexpensive reactants, use of elemental sulfur and selenium under aerobic condition.
A Novel and Facile Synthesis of Chroman‐4‐one Derivatives via Cascade Radical Cyclization Under Metal‐free Condition
Authors: Xiao Yong‐Mei , Liu Yang , Mai Wen‐Peng , Mao Pu , Yuan Jin‐Wei , Yang Liang‐Ru 
Published: February 2019

AbstractA novel and facile method for the synthesis of 3‐(2‐oxo‐2‐arylethyl)chroman‐4‐ones under metal‐free conditions is described. In the presence of nBu4NBr and K2S2O8, arylaldehydes or aliphatic aldehydes with various functional groups could react with different 2‐(allyloxy)arylaldehydes via radical process to produce chroman‐4‐one derivatives in moderate to good yields. The method features metal‐free, step‐economical manner and easily available starting materials, exhibiting its practical synthetic value in some biologically active compounds.
Buckled Structures: Fabrication and Applications in Wearable Electronics
Authors: Hu Xiaoyu , Dou Yuanyuan , Li Jingjing , Liu Zunfeng 
Published: February 2019

AbstractWearable electronics have attracted a tremendous amount of attention due to their many potential applications, such as personalized health monitoring, motion detection, and smart clothing, where electronic devices must conformably form contacts with curvilinear surfaces and undergo large deformations. Structural design and material selection have been the key factors for the development of wearable electronics in the recent decades. As one of the most widely used geometries, buckling structures endow high stretchability, high mechanical durability, and comfortable contact for human–machine interaction via wearable devices. In addition, buckling structures that are derived from natural biosurfaces have high potential for use in cost‐effective and high‐grade wearable electronics. This review provides fundamental insights into buckling fabrication and discusses recent advancements for practical applications of buckled electronics, such as interconnects, sensors, transistors, energy storage, and conversion devices. In addition to the incorporation of desired functions, the simple and consecutive manipulation and advanced structural design of the buckled structures are discussed, which are important for advancing the field of wearable electronics. The remaining challenges and future perspectives for buckled electronics are briefly discussed in the final section.
Complementary Resistive Switching Using Metal–Ferroelectric–Metal Tunnel Junctions
Authors: Qian Mengdi , Fina Ignasi , Sánchez Florencio , Fontcuberta Josep 
Published: February 2019

AbstractComplementary resistive switching (CRS) devices are receiving attention because they can potentially solve the current‐sneak and current‐leakage problems of memory arrays based on resistive switching (RS) elements. It is shown here that a simple anti‐serial connection of two ferroelectric tunnel junctions, based on BaTiO3, with symmetric top metallic electrodes and a common, floating bottom nanometric film electrode, constitute a CRS memory element. It allows nonvolatile storage of binary states (“1” = “HRS+LRS” and “0” = “LRS+HRS”), where HRS (LRS) indicate the high (low) resistance state of each ferroelectric tunnel junction. Remarkably, these states have an identical and large resistance in the remanent state, characteristic of CRS. Here, protocols for writing information are reported and it is shown that non‐destructive or destructive reading schemes can be chosen by selecting the appropriate reading voltage amplitude. Moreover, this dual‐tunnel device has a significantly lower power consumption than a single ferroelectric tunnel junction to perform writing/reading functions, as is experimentally demonstrated. These findings illustrate that the recent impressive development of ferroelectric tunnel junctions can be further exploited to contribute to solving critical bottlenecks in data storage and logic functions implemented using RS elements.
The South American genera of Hemerocallidaceae (Eccremis and Pasithea): two introductions to the New World
Authors: Wurdack Kenneth J.J. , Dorr Laurence J. 
Published: February 2019

AbstractTwo unispecific genera, Eccremis and Pasithea, are the only representatives of Hemerocallidaceae (Asparagales) native to the Western Hemisphere. The affinities of the former genus have been recently questioned. Phylogenetic analyses of DNA sequence data (plastid atpB, ndhF, rbcL, trnL-F) spanning the Asparagales recover a monophyletic Hemerocallidaceae and strongly support the inclusion of Eccremis within that family. Eccremis is sister to Dianella and not closely associated with Pasithea, which indicates two introductions of Hemerocallidaceae to the New World. A taxonomic synopsis of Eccremis and Pasithea is presented and morphological character evolution and biogeography are discussed.
Is Persea (Lauraceae) monophyletic? Evidence from nuclear ribosomal ITS sequences
Authors: Rohwer Jens G. , Li Jie , Rudolph Barbara , Schmidt Sabrina A. , van der Werff Henk , Li Hsi-wen 
Published: February 2019

AbstractThe delimitation of genera within the Persea group (Lauraceae) has always been controversial. In an attempt to resolve the phylogenetic lines within this group, we analyzed ITS sequences of 61 species of the Persea group (Lauraceae) and 30 other species of Lauraceae. Several of the traditional genera or subgenera form well­supported groups, viz., Persea subg. Eriodaphne, Machilus, Persea subg. Persea, and Alseodaphne including Dehaasia. The included species of Phoebe form two clades that are unresolved with respect to Alseodaphne. However, Persea subg. Eriodaphne (together with the Macaronesian Apollonias barbujana) forms one of the clades of an unresolved basal trichotomy within the Persea group, whereas Persea subg. Persea is well supported as member of an otherwise Asian clade including Alseodaphne and Phoebe. This indicates that Persea, as currently circumscribed, is not monophyletic. The affinities of the Macaronesian Persea indica are clearly American rather than Asian.
Relationships within Blumea (Inuleae, Asteraceae) and the utility of the 5S­NTS in species­level phylogeny reconstruction
Authors: Pornpongrungrueng Pimwadee , Borchsenius Finn , Gustafsson Mats H.G. 
Published: February 2019

AbstractIn an attempt to improve the phylogenetic resolution in clades of the genus Blumea beyond what could be achieved with sequence data from plastid regions (trnL­F, psbA­trnH) and ITS, the 5S­NTS (non­transcribed spacer) was sequenced as it has been reported to show higher levels of variation than the former regions. 5SNTS yields a tree less resolved than ITS and the plastid regions; the latter markers, moreover, provided more resolution at deeper nodes. When combined with ITS and plastid sequences, 5S­NTS adds very little resolution. The results indicate that previously published, morphology­based sectional classifications of the genus are highly unnatural. The three varieties of B. hieraciifolia belong to different clades and should be treated as different species.
Reticulate evolution and taxonomic concepts in theRanunculus auricomuscomplex (Ranunculaceae): insights from analysis of morphological, karyological and molecular data
Authors: Hörandl Elvira , Greilhuber Johann , Klímová Katarina , Paun Ovidiu , Temsch Eva , Emadzade Khatere , Hodálová Iva 
Published: February 2019

AbstractTheRanunculus auricomuscomplex is an interesting model system for studying the evolution and diversity of apomictic polyploid complexes. It comprises hundreds of agamospecies, usually referred to two distinct morphotypes (traditionally named "R. auricomus" and "R. cassubicus") which are connected by several intermediate forms. Here we try to elucidate the evolution of apomictic"cassubicus" morphotypes and we test criteria for different classification concepts by combining the information of molecular phylogenetic, morphological, karyological and population genetic data (AFLPs, amplified fragment length polymorphism). Phylogenetic analysis based on sequences of the nrDNA ITS and plastid data (matK , trnk, psbJ­psbA) suggest a deep split between the diploid sexual species R. notabilis ("auricomus" morphotype) from the closely related allopatric taxa R. cassubicifolius and R. carpaticola ("cassubicus"). The apomictic "cassubicus" morphotypes are not monophyletic, as one, R. hungaricus, groups with R. notabilis, which may be due to hybrid origin. Morphometric studies and ploidy level determinations via Feulgen densitometry show a transition from 4xR.hungaricusto the 6xapomictic hybrid derivatives ofR. cassubicifoliusandR. carpaticola. In two accessions, AFLPs and flow cytometric data suggest local gene flow among different apomictic polyploid morphotypes. Frequent facultative sexuality of apomicts may increase genetic diversity by continuous formation of new cytotypes, local hybridization and introgression, which obstructs the fixation of distinct agamospecies. We conclude that "R. cassubicus" and "R. auricomus" cannot be regarded as species but should be treated as either informal groups, or as (notho)taxa at the sectional level. To reflect the different evolutionary processes involved, we propose a separate classification of the sexual species,R. notabilisand the closely related species pairR. cassubicifoliusandR. carpaticola. Based on these well­defined biological species, the apomictic biotypes can be classified as nothotaxa.
Typification of Linnaean names in Liliaceae
Authors: Peruzzi Lorenzo E. , Jarvis Charlie E. 
Published: February 2019

AbstractThe typification of eleven Linnaean names of taxa belonging to the current circumscription of Liliaceae is discussed. Lectotypes are designated from the Linnaean herbarium at LINN (Lilium bulbiferum, L. candidum, L. martagon), the Burser herbarium at UPS (Bulbocodium serotinum, Fritillaria pyrenaica, Lilium bulbiferum), the Van Royen Herbarium at L (Fritillaria persica, Lilium chalcedonicum, Uvularia amplexifolia), the Clifford Herbarium at BM (Lilium pomponium) and from the Sloane herbarium in BM­SL (Bulbocodium autumnale). A specimen in BM is designated as the neotype of Lilium camschatcense. Each type choice maintains the present usage of the corresponding Linnaean name.
Echinochloa colona versus" Echinochloa colonum" (Poaceae)
Authors: Michael Peter W. 
Published: February 2019

AbstractConfusion in current botanical literature about the correct spelling of the specific epithet of the important crop weed referred to as either Echinochloa colona or E. colonum is resolved in favour of E. colona. The use of " colonus " as an adjective is not found in classical Latin dictionaries published since the latter part of the 19th century but is found in dictionaries, listed here, published between the late 17th and early 19th centuries. Linnaeus and other early botanists were quite in order to adopt " colonus " as an adjective and decline it according to the gender of the generic name, as in Panicum colonum L. and Echinochloa colona (L.) Link.
Conservation of microalgal type material: Approaches needed for 21st century science
Authors: Day John G. , Pröschold Thomas , Friedl Thomas , Lorenz Maike , Silva Paul C. 
Published: February 2019

AbstractThe current edition of the International code of botanical nomenclature (Vienna Code) accepts cultures of fungi and algae as types provided that they are preserved in a metabolically inactive state. In this article the authors outline a procedure for cryopreserving type cultures at ultra‐low temperatures (<−135°C), thus ensuring that the material is held in a stable, metabolically inactive state. This procedure would allow direct access to live ex‐type cultures, facilitating traditional research as well as molecular, metabolomic and proteomic studies.
Species identity in the Solanum bahamense species group (Solanaceae, Solanum subgenus Leptostemonum)
Authors: Strickland-Constable Rose , Schneider Harald , Ansell Stephen W. , Russell Stephen J. , Knapp Sandra 
Published: February 2019

AbstractThe Solanum bahamense L. species group is a small monophyletic group of spiny solanums (Solanum subg. Leptostemonum) restricted to the West Indies. The group has been variously recognised as including one to five species, and one of these (Solanum ensifolium Dunal, as S. drymophilum O.E. Schulz) is listed under the U.S. Endangered Species Act. We here use a combination of morphological characters and plastid sequence data to assess diversity within the group and to explore patterns of differentiation across the archipelago. We recognise three species in the group: S. polyacanthos Lam., endemic to Hispaniola, S. ensifolium Dunal, endemic to Puerto Rico, and S. bahamense L., widespread across the region from the Florida Keys to Grenada, but absent from Hispaniola. Within S. bahamense, three geographically distinct lineages can be distinguished. Maximal genetic diversity in the group occurs in the centre of the archipelago, on Hispaniola and Puerto Rico (including the Virgin Islands). A taxonomic treatment of the three species is provided, with a key, complete typification for all synonyms and exsiccatae (in an Appendix). We recognise the distinctness of S. ensifolium and our data provide support for its inclusion in the Endangered Species Act and its Red List status as critically endangered.