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  • Саламбек Наибович Хаджиев
    К 70-летию со дня рождения
  • Новый состав Научного совета по катализу ОХНМ РАН
  • Положение о Научном совете по катализу ОХНМ РАН
  • 2011 год – Международный год химии
  • А.П. Кагырманова, Т.В. Замулина
    Евразийский симпозиум по инновационному катализу и электрохимии, посвященный 100-летию со дня рождения академика В.Д. Сокольского
  • Т.В. Замулина, В.А. Яковлев
    Международная конференция "Катализ для переработки возобновляемого сырья"
  • А.В. Воронцов
    18-я Международная конференция по фотохимическому преобразованию и хранению солнечной энергии
  • Л.Я. Старцева
    Азербайджано-Российский симпозиум с международным участием
    "Катализ в решении проблем нефтехимии и нефтепереработки"
  • Нобелевские премии по химии и физике 2010 г
  • За рубежом
  • Приглашения на конференции



Саламбек Наибович Хаджиев. К 70-летию со дня рождения

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Новый состав Научного совета по катализу ОХНМ РАН

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Положение о Научном совете по катализу ОХНМ РАН

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2011 год – Международный год химии

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Протокол заседания Комитета по проведению в России в 2011 г. Международного года химии

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План основных мероприятий по подготовке и проведению Международного года химии в России в 2011 году

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Евразийский симпозиум по инновационному катализу и электрохимии

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Катализ для переработки возобновляемого сырья

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18-я Международная конференция по фотохимическому преобразованию и хранению солнечной энергии

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Катализ в решении проблем нефтехимии и нефтепереработки

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Нобелевская премия по химии 2010 г

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Нобелевская премия по физике 2010 г.

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За рубежом

CATALYSIS IN CRYSTALS

INORGANIC CHEMISTRY: Single crystals of iridium complex can exchange ligands and hydrogenate ethylene.

A SINGLE CRYSTAL of an iridium complex can exchange small-molecule ligands, such as CO and NH3, for N2 and selectively catalyze the conversion of ethylene to ethane, report researchers from the University of North Carolina, Chapel Hill (Nature 2010, 465, 598).

“Reactions of molecular crystals with gases involving covalent bond breaking and formation are as yet quite a rare observation,” says Lee Brammer, a chemistry professor at the University of Sheffield, in England. That the nonporous molecular crystals studied by the UNC group can hydrogenate ethylene is groundbreaking, he adds.

In the new work, Zheng Huang, Peter S. White, and Maurice Brookhart used a bulky, electron-deficient ligand, C6H3[OP(C6H2,(CF3)3)2]2, and N2 to create the square planar iridium complex [Ir]-N2 (shown). Crystallization of the complex from toluene yielded light red single crystals. Structures of the crystals showed that the iridium complex’s four CF3-substituted aryl rings form a pocket around the N2 site. Multiple iridium complexes stack in such a way that disordered toluene molecules line a channel that runs along the smallmolecule site.

When they exposed the [Ir]-N2 crystals to gases of small molecules, Huang and colleagues found that the N2 exchanged to form crystals of different colors: dark red [Ir]-NH3, orange [Ir]-CO (end-on with an Ir-C bond), deep red [Ir]-C2H4 (side-on), green [Ir]-O2 (side-on), and light red [Ir]-(H)2(H2) (two Ir-H bonds and one side-on H2). The crystals’ ability to exchange ligands depends on the size of the incoming molecule. For example, although the crystals took up ethylene to form [Ir]-C2H4, they would not take up propylene.

Huang and coworkers believe that the gases enter the crystal through the channel occupied by the disordered toluenes. Vacuum experiments demonstrated that the small-molecule ligands are not simply lost, leaving an open coordination site for the new ligand to fill. Instead, a ligand-exchange mechanism seems to be at work.

The group also found that when crystals of [Ir]-N2 were exposed to a mix of ethylene, propylene, and hydrogen, ethylene was selectively hydrogenated. That selectivity is not seen in common heterogeneous palladium-on-carbon hydrogenation catalysts, Sheffield’s Brammer notes.

Although growing single crystals would be impractical for large-scale catalysis, details gained from studying this system could provide insight into the catalytic mechanism and lead to better catalyst design, says Paul R. Raithby, a chemistry professor at the University of Bath, in England. Raithby points to measurements of solid-gas reaction kinetics and the possible development of new gas sensors based on single crystals as possible applications of the work. — JYLLIAN KEMSLEY

WWW.CEN-ONLINE.ORG
JUNE 7, 2010

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Импакт-факторы и цитируемость журналов, выпускаемых издательством Elsevier

Elsevier publishes 16 out of the Top 20 Journals within ENGINEERING, CHEMICAL

Impact Factors

Category: ENGINEERING, CHEMICAL, Sorted by Impact Factor

Rank Title 2009 Impact Factor
1 PROGRESS IN ENERGY AND COMBUSTION SCIENCE 11.024
2 JOURNAL OF CATALYSIS 5.288
3 APPLIED CATALYSIS B-ENVIRONMENTAL 5.252
4 CATALYSIS TODAY 3.526
5 PROCEEDINGS OF THE COMBUSTION INSTITUTE 3.256
6 CHEMISTRY AND PHYSICS OF CARBON 3.250
7 JOURNAL OF MEMBRANE SCIENCE 3.203
8 FUEL 3.179
9 COMBUSTION AND FLAME 2.923
10 SEPARATION AND PURIFICATION TECHNOLOGY 2.879
11 DYES AND PIGMENTS 2.855
12 CHEMICAL ENGINEERING JOURNAL 2.816
13 AEROSOL SCIENCE AND TECHNOLOGY 2.739
14 JOURNAL OF SUPERCRITICAL FLUIDS 2.639
15 SEPARATION AND PURIFICATION REVIEWS 2.615
16 JOURNAL OF AEROSOL SCIENCE 2.529
17 REACTIVE & FUNCTIONAL POLYMERS 2.461
18 PROCESS BIOCHEMISTRY 2.444
19 FUEL PROCESSING TECHNOLOGY 2.321
20 ENERGY & FUELS 2.319

Citations

Elsevier also publishes 4 out of the Top 5 most cited journals within Chemical Engineering

Category: ENGINEERING, CHEMICAL, Sorted by Citations

Rank Title 2009 Total Citations
1 JOURNAL OF CATALYSIS 31,744
2 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 25,480
3 JOURNAL OF MEMBRANE SCIENCE 24,096
4 CHEMICAL ENGINEERING SCIENCE 21,512
5 CATALYSIS TODAY 20,194

Рост импакт-факторов:

рост импакт факторов-1

Рост цитируемости:

рост импакт факторов-1

Импакт-факторы журналов по катализу

Journal of Catalysis, Applied Catalysis B: Environmental and Catalysis Today are ranked 2nd , 3rd and 4th respectively within Thomson Reuters' Engineering, Chemical category.*

Journal of Catalysis is also ranked 1st in the Top Most Cited Journals in Engineering, Chemical.

Title 2009 Impact Factor*
Applied Catalysis A, General 3.564
Applied Catalysis B: Environmental 5.252
Catalysis Communications 3.000
Catalysis Today 3.526
Chinese Journal of Catalysis 0.786
Journal of Catalysis 5.288
Journal of Hazardous Materials 4.144
Journal of Molecular Catalysis A: Chemical 3.135
Journal of Molecular Catalysis B: Enzymatic 2.400
Microporous and Mesoporous Materials 2.652
* Journal Citation Reports®, published by Thomson Reuters, 2010


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