1,721,028 research outputs found
Efficient Reduction of Carbon Dioxide to Methanol Equivalents Catalyzed by Two-Coordinate Amido-Germanium(II) and -Tin(II) Hydride Complexes
No full textbibtex: ISI:000395726500043 bibtex\location:'1155 16TH ST, NW, WASHINGTON, DC 20036 USA',publisher:'AMER CHEMICAL SOC',type:'Article',affiliation:'Jones, C (Reprint Author), Monash Univ, Sch Chem, Monash Ctr Catalysis, POB 23, Clayton, Vic 3800, Australia. Maron, L (Reprint Author), Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Maron, L (Reprint Author), CNRS, INSA, UPS, UMR 5215,LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France. Hadlington, Terrance J.; Jones, Cameron, Monash Univ, Sch Chem, Monash Ctr Catalysis, POB 23, Clayton, Vic 3800, Australia. Kefalidis, Christos E.; Maron, Laurent, Univ Toulouse, 135 Ave Rangueil, F-31077 Toulouse, France. Kefalidis, Christos E.; Maron, Laurent, CNRS, INSA, UPS, UMR 5215,LPCNO, 135 Ave Rangueil, F-31077 Toulouse, France.','author-email':'[email protected] [email protected]',da:'2018-12-05','doc-delivery-number':'EN0UR','funding-acknowledgement':'Australian Research Council; U.S. Air Force Asian Office of Aerospace Research and Development [FA2386-14-1-4043]; Alexander von Humboldt Foundation; Chinese Academy of Science','funding-text':'This research was supported by the Australian Research Council (grant to C.J.) and the U.S. Air Force Asian Office of Aerospace Research and Development (Grant FA2386-14-1-4043 to C.J.). Part of this research was undertaken on the MX1 beamline at the Australian Synchrotron (Victoria, Australia). L.M. acknowledges the Alexander von Humboldt Foundation for a grant of experienced researcher, the Chinese Academy of Science for a senior researcher grant, and CAlMip for computational time.','journal-iso':'ACS Catal.','keywords-plus':'CO2 REDUCTION; AMIDO-DIGERMYNE; HYDROBORATION; ACTIVATION; HYDROGENATION; GERMANIUM(II); CONVERSION; MOLECULES; GERMYLENE; FACILE','number-of-cited-references':'44','orcid-numbers':'Kefalidis, Christos/0000-0002-1380-4337','research-areas':'Chemistry','researcherid-numbers':'Kefalidis, Christos/G-1067-2012','times-cited':'15','unique-id':'ISI:000395726500043','usage-count-last-180-days':'6','usage-count-since-2013':'58','web-of-science-categories':'Chemistry, Physical'\International audienceThe bulky amido-germanium(II) and -tin(II) hydride complexes, (LEH)-E-dagger [E = Ge or Sn; L-dagger = -N(Ar-dagger) (SiPr3i); Ar-dagger = C6H2Pri\C(H)Ph-2\(2)-4,2,6], which are two-coordinate in solution, are shown to be efficient and highly selective \textquotedblleftsingle site\textquotedblright catalysts for the reduction of CO2 to methanol equivalents (MeOBR2), using HBpin or HBcat as the hydrogen source. (LSnH)-Sn-dagger is the most active non-transition metal catalyst yet reported for such reductions, yielding turnover frequencies of up to 1188 at room temperature. Computational studies have identified two thermodynamically and kinetically viable catalytic pathways by which these reductions may operate. Spectroscopic investigations have identified several reaction intermediates, which leads to the conclusion that one of these reaction pathways predominates in the experimental situation. Stoichioinetric reactivity studies have shed further light on the reaction mechanisms in operation and indicate that the involvement of the second reaction pathway cannot be ruled out. This study highlights the potential of relatively cheap, main group complexes as viable alternatives to transition metal-based systems in the catalytic transformation of small molecules
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Insights into the Cascade Reaction of CO and Heteroallenes Mediated by Dinitrogen Hafnocene Complexes: The Indirect Effect of Nitride's Nucleophilicity
No full textInternational audienceA DFT mechanistic exploration of the reactivity of the dinitrogen hafnocene complex, [{(η5‐C5H2‐1,2,4‐Me3)2Hf}2(μ2‐N2)], towards mixtures of CO/CO2 and CO/OCNtBu is reported. The crucial role of the nitride intermediate is highlighted, as well as the importance of the bridging mode of the cyanate ligand between the two Hf metal atoms throughout the process. Interestingly, the CO2 addition to the nitride intermediate occurs through an outer‐sphere transition state, whereas the addition of the heteroallene is governed by the steric congestion imposed by cyclopentadienyl ligands
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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