Anchors Away!

Written by Christopher Hinde. Christopher obtained his Masters in Chemistry (MChem) from the University of Southampton, UK in 2011. He is currently doing research towards a Ph.D. in the area of materials chemistry and catalysis under the supervision of both Dr Robert Raja at the University of Southampton and Prof. T. S. Andy Hor at the Institute of Materials Research and Engineering (IMRE), a research institute in Singapore’s Agency for Science Technology and Research (A*STAR).

The latest themed issue from Catalysis Science and Technology, “Catalysis on Chiral Surfaces: From Fundamental Aspects to Application”, contains a plethora of articles reporting on the latest heterogeneous catalysts with significant stereospecific properties for asymmetric or chiral transformations.

In an article from the group of Dr Raja at the University of Southampton, UK, S. Newland et al. demonstrate the importance of anchoring organocatalysts to the inner walls of mesoporous silica to attain highly active and selective catalysts. Traditionally, organocatalysts are used in a homogeneous fashion, however this often leads to labour and energy intensive recollection for recycling of the catalyst. The covalent anchoring of cinchonine to the inner walls of mesoporous silicas not only gains the facile recycle benefits of a heterogeneous catalyst, but can increase the activity 6-fold for Michael addition reactions compared with the homogeneous analogue. And this is all achieved without sacrificing the enantioselectivity of the catalyst!

The anchoring methods were applied to DABCO, another molecule used as a chemoselective organocatalyst to show that the method could be applied to a variety of different catalysts with equally impressive results. It is easy to envisage these anchoring methods being significantly useful to any researchers working in the area of chiral organocatalysis.

Want to find out more on the synthesis and origin of these catalytic properties? Read the full article now!

Highly effective design strategy for the heterogenisation of chemo- and enantioselective organocatalysts
Stephanie H. Newland, David J. Xuereb, Enrica Gianotti, Leonardo Marchese, Ramon Rios and Robert Raja
Catal. Sci. Technol., 2015,5, 660-665, DOI: 10.1039/C4CY00895B,

Graphical abstract: Highly effective design strategy for the heterogenisation of chemo- and enantioselective organocatalysts

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Catalysis Science and Technology – One Day Symposium

Catalysis Science and Technology is delighted to announce that the journal is organising a one day Symposium on the subject of Sustainable Catalytic Conversions of Renewable Substrates (SuBiCat II) on 2nd March 2015, at St Andrews, UK.

The symposium is free of charge, but you are requested to register before 15th February 2015 at http://www.subicat.org/events/index.php.

There is an excellent list of speakers already confirmed, including:

  • Prof. Piet van Leeuwen , ICIQ, Tarrgona, Spain
  • Dr Pieter Bruijnincx, University of Utrecht, The Netherlands
  • Prof. Ding Ma Peking University, China
  • Prof. Carsten Bolm, RWTH Aachen University, Germany
  • Prof. David Jackson, University of Glasgow, Scotland, UK
  • Dr Kristiina Hilden, University of Helsinki, Finland
  • Prof. Christian Bruneau, University of Rennes, France
  • Prof. John Irvine, University of St Andrews, Scotland, UK
  • Prof. Dr. Pérez-Ramírez, Institute for Chemical and Bioengineering, Zurich, Switzerland

Visit the website for further information and to register now.

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HOT articles in Catalysis Science & Technology

The following HOT articles have been highlighted by the reviewers of the articles as being particularly interesting or significant pieces of research. These are all free to access until 31st January 2015. The order they appear in the list has no meaning or ranking.

Selectivity and kinetics of methyl crotonate hydrogenation over Pt/Al2O3
Chaoquan Hu, Derek Creaser, Henrik Grönbeck, Houman Ojagh and Magnus Skoglundh  
DOI: 10.1039/C4CY01470G, Paper

C4CY01470G GA

Structuring catalyst and reactor – an inviting avenue to process intensification
J. Gascon, J. R. van Ommen, J. A. Moulijn and F. Kapteijn  
DOI: 10.1039/C4CY01406E, Perspective

C4CY01406E GA

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HOT articles in Catalysis Science & Technology

Take a look at the selection which are free to read for a short time:

Synergistic catalysis-induced ring-opening reactions of 2-substituted 3,4-dihydropyrans with α-oxoketene dithioacetals
Changhui Liu, Amir Taheri, Bingbing Lai and Yanlong Gu  
DOI: 10.1039/C4CY01212G, Paper

C4CY01212G GA


 

Photocatalytic hydrogen generation from water reduction using orchestrated photosensitizers
Shu-Cheng Yang, Gang Chang, Guan-Jun Yang, Yan-Jie Wang and Baizeng Fang  
DOI: 10.1039/C4CY01112K, Paper


Production of alcohols via hydroformylation
Galina Morales Torres, Robin Frauenlob, Robert Franke and Armin Börner  
DOI: 10.1039/C4CY01131G, Minireview

C4CY01131G GA


 

CoCuAl layered double hydroxides – efficient solid catalysts for the preparation of industrially important fatty epoxides
Sivashunmugam Sankaranarayanan, Ankita Sharma and Kannan Srinivasan  
DOI: 10.1039/C4CY01138D, Paper


Partial hydrogenation of acetylene over a NiTi-layered double hydroxide supported PdAg catalyst
Y. N. Liu, J. T. Feng, Y. F. He, J. H. Sun and D. Q. Li  
DOI: 10.1039/C4CY01160K, Paper

C4CY01160K GA


 

Washcoating of cordierite honeycomb with vanadia–tungsta–titania mixed oxides for selective catalytic reduction of NO with NH3
Bo Liu, Jun Du, Xiaowei Lv, Yue Qiu and Changyuan Tao  
DOI: 10.1039/C4CY01179A, Paper


Synthesis, characterization and catalytic performances of Cu- and Mn-containing ordered mesoporous carbons for the selective catalytic reduction of NO with NH3
Feifei Cao, Jinghuan Chen, Changlei Lyu, Mingjiang Ni, Xiang Gao and Kefa Cen  
DOI: 10.1039/C4CY01221F, Paper


Catalysis at the sub-nanoscale: complex CO oxidation chemistry on a few Au atoms
Nima Nikbin, Natalie Austin, Dionisios G. Vlachos, Michail Stamatakis and Giannis Mpourmpakis  
DOI: 10.1039/C4CY01295J, Paper

C4CY01295J GA

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FineCat 2015 – Symposium on heterogeneous catalysis for fine chemicals

The 4th FineCat Symposium will be taking place from 8th–9th April 2015 in Palermo, Palazzo Steri.  The event is jointly organised by the Institute of Nanostructured Materials of Italy’s Research Council (CNR) and by Palermo’s University DEIM Department and aims to provide an opportunity for contact between academic and industrial researchers, manufacturers and users of solid catalysts for the efficient and selective production of fine chemicals.

Confirmed plenary speakers include:

  • Manfred Reetz, External emeritus group leader of the Mülheim Max-Planck-Institute, Hans-Meerwein-Research-Professor, Marburg University, Germany
  • Pedro J. Maireles Torres, Department of Inorganic Chemistry, University of Malaga, Spain
  • Oliver Kappe, Institute of Chemistry, University of Graz, Austria
  • Rodrigo de Souza, Institute of Chemistry, Federal University of Rio de Janeiro, Brazil

The deadline for abstracts in 31st December 2014. For further information and to register, visit the website now!

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State-of-the-art in Photocatalysis with Semiconductor Materials

Written by Christopher Hinde. Christopher obtained his Masters in Chemistry (MChem) from the University of Southampton, UK in 2011. He is currently doing research towards a Ph.D. in the area of materials chemistry and catalysis under the supervision of both Dr Robert Raja at the University of Southampton and Prof. T. S. Andy Hor at the Institute of Materials Research and Engineering (IMRE), a research institute in Singapore’s Agency for Science Technology and Research (A*STAR).

Surely the next go-to article in the area of semiconductor photocatalysis, this thorough review by a group from the US is likely to appeal to both young researchers and established scientists alike. If you are new to the area of photocatalysis with semiconductor materials, the authors do a great job of collating the best background literature to introduce the topic, key principles and concepts in a concise fashion. At the same time, the authors have intricately organised the cutting edge research in the field so as to provide a useful tool for established researchers to continue pushing the frontiers of solar energy conversion.

In the first instance, a summary of single material photocatalysts are discussed from the well-known metal oxides and sulphides such as TiO2 and CdS through to mixed metal oxides and heavier group VI materials. Especially highlighted is how the chemical and physical structures of materials help to define the optical properties that are required for catalytic processes; band structures can be influenced by doping and energy losses can be minimised by manipulating the dimensionality and macrostructures of engineered materials.

Further discussed are more complex semiconductor composites, bringing together multiple semiconductors or combining with other materials such as carbons. These in turn have led to the development of devices such as tandem cells, which have drastically improved upon the quantum efficiencies that can be attained. The authors have successfully drawn together state-of-the-art work, breaking down the theoretical considerations in a logical manner, to allow the reader to appreciate the current state of research in the field whilst leaving the door wide open for development and innovation for the future.

Take a look at the full review article now!

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review

Jiangtian Li and   Nianqiang Wu

DOI: 10.1039/C4CY00974F
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HOT articles in Catalysis Science & Technology

Take a look at the selection which are free to read for a short time:

Stable and selective electrochemical reduction of carbon dioxide to ethylene on copper mesocrystals
Chung Shou Chen, Albertus D. Handoko, Jane Hui Wan, Liang Ma, Dan Ren and Boon Siang Yeo
DOI: 10.1039/C4CY00906A, Paper

Mechanistic insights into the Nb2O5 and niobium phosphate catalyzed in situ condensation of a fluorescent halochromic assembly Stefania Impellizzeri,
Sabrina Simoncelli, Chiara Fasciani, M. Luisa Marin, Geniece L. Hallett-Tapley, Gregory K. Hodgson and Juan C. Scaiano
DOI: 10.1039/C4CY00703D, Paper

C4CY00703D GA

The selective addition of water
Verena Resch and Ulf Hanefeld
DOI: 10.1039/C4CY00692E, Perspective

C4CY00692E

Nitrobenzene reduction catalyzed by carbon: does the reaction really belong to carbocatalysis?
Shuchang Wu, Guodong Wen, Jia Wang, Junfeng Rong, Baoning Zong, Robert Schlögl and Dang Sheng Su
DOI: 10.1039/C4CY00811A, Communication

C4CY00811A GA

The synthesis of pyrroles via acceptorless dehydrogenative condensation of secondary alcohols and 1,2-amino alcohols mediated by a robust and reusable catalyst based on nanometer-sized iridium particles
Daniel Forberg, Johannes Obenauf, Martin Friedrich, Sven-Martin Hühne, Werner Mader, Günter Motz and Rhett Kempe
DOI: 10.1039/C4CY01018C, Communication

C4CY01018C GA

Semiconductor-based photocatalysts and photoelectrochemical cells for solar fuel generation: a review
Jiangtian Li and Nianqiang Wu
DOI: 10.1039/C4CY00974F, Perspective

C4CY00974F GA

Synergistic effect of PtSe2 and graphene sheets supported by TiO2 as cocatalysts synthesized via microwave techniques for improved photocatalytic activity
Kefayat Ullah, Shu Ye, Zhu Lei, Kwang-Yeon Cho and Won-Chun Oh
DOI: 10.1039/C4CY00886C, Paper

C4CY00886C GA

One-pot synthesis of (R)-2-acetoxy-1-indanone from 1,2-indanedione combining metal catalyzed hydrogenation and chemoenzymatic dynamic kinetic resolution
Otto Långvik, Thomas Sandberg, Johan Wärnå, Dmitry Yu. Murzin and Reko Leino
DOI: 10.1039/C4CY01099J, Paper

C4CY01099J GA

Bottom-up approach to engineer two covalent porphyrinic frameworks as effective catalysts for selective oxidation
Weijie Zhang, Pingping Jiang, Ying Wang, Jian Zhang and Pingbo Zhang
DOI: 10.1039/C4CY00969J, Communication

C4CY00969J GA

Electrochemically dealloyed platinum with hierarchical pore structure as highly active catalytic coating
Ralph Kraehnert, Erik Ortel, Benjamin Paul, Bjoern Eckhardt, Michael Kanis, Ran Liu and Antonia Antoniou
DOI: 10.1039/C4CY00851K, Paper

C4CY00851K GA

Isotopic probes for ruthenium-catalyzed olefin metathesis
Justin A. M. Lummiss, Adrian G. G. Botti and Deryn E. Fogg
DOI: 10.1039/C4CY01118J, Paper
From themed collection Mechanistic Studies in Catalysis

Molybdenum blue nano-rings: an effective catalyst for the partial oxidation of cyclohexane
Xi Liu, Marco Conte, Weihao Weng, Qian He, Robert L. Jenkins, Masashi Watanabe, David J. Morgan, David W. Knight, Damien M. Murphy, Keith Whiston, Christopher J. Kiely and Graham J. Hutchings
DOI: 10.1039/C4CY01213E, Paper

C4CY01213E GA

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Linking Porphyrins for Heterogeneous Catalysis

Written by Christopher Hinde. Christopher obtained his Masters in Chemistry (MChem) from the University of Southampton, UK in 2011. He is currently doing research towards a Ph.D. in the area of materials chemistry and catalysis under the supervision of both Dr Robert Raja at the University of Southampton and Prof. T. S. Andy Hor at the Institute of Materials Research and Engineering (IMRE), a research institute in Singapore’s Agency for Science Technology and Research (A*STAR).

In this recent communication, W. Zhang and co-workers have demonstrated a novel way to form covalent porphyrinic frameworks (CPFs) using squaraine and hydrazine linkers. By using purely organic moieties the researchers have eliminated the need for metal nodes that are present in the more traditional porous coordination polymers.

Using the principles of supramolecular chemistry the authors have used a metallation process to introduce manganese, a well-known and abundant redox active transition metal, into the cavity of the porphyrin component of the framework. Thus, an easily accessible active site for redox catalysis was generated and subsequently demonstrated to be active for the selective oxidation of aliphatic molecules.

Interestingly, it was also shown that the choice of linker can have an effect on the resulting catalytic activity of these new materials. Preliminary characterisation showed a correlation between the extended conjugation of the organic framework, the state of the manganese and the activity/selectivity of the catalytic processes. This phenomenon, often observed in homogeneous porphyrin catalysts, has been elegantly incorporated into these heterogeneous analogues. One can hypothesise that in future, by careful design of the organic linkers joining the porphyrin units, it may be possible to fine-tune the material for different catalytic reactions.

To find out more, why not take a look at the article now?

Bottom-up approach to engineer two covalent porphyrinic frameworks as effective catalysts for selective oxidation

Weijie Zhang, Pingping Jiang, Ying Wang, Jian Zhang and Pingbo Zhang

Catal. Sci. Technol., 2015, DOI: 10.1039/C4CY00969J

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Unfogging metathesis catalyst deactivation

Grubbs catalyst deactivationD. Fogg et al. have discovered a powerful means to observe the behaviour of Grubbs metathesis catalysts.

The University of Ottawa researchers tagged first- and second-generation ruthenium catalysts with a 13C label at the alkylidene site using straightforward synthesis routes. This isotopic enrichment allowed 13C NMR spectroscopy to serve as a sensitive probe for the amine-initiated decomposition pathway.

A surprising preference for nucleophilic attack by phosphine was clearly revealed in the 13C NMR spectrum. This demonstrates the diagnostic utility of 13C-enriched complexes relative to both their unlabelled and deuterium-labelled analogues.

This article is featured amongst many other excellent contributions in the latest Catalysis Science & Technology themed issue, Mechanistic Studies in Catalysis.

Take a look at the original article online now!

Isotopic Probes for Ruthenium-Catalyzed Olefin Metathesis
Justin A. M. Lummiss, Adrian G. G. Botti, and Deryn E. Fogg*
Catal. Sci. Technol. 2014, Advance Article, DOI: 10.1039/C4CY01118J

Jenna Flogeras obtained her B.Sc. and M.Sc. in Chemistry from the University of New Brunswick (Fredericton), Canada. She is currently a Ph.D. student at Memorial University in Newfoundland, where she studies aluminum-based catalysts under the supervision of Dr. Francesca Kerton.

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Mechanistic studies in catalysis themed issue – now online

We are delighted to present a themed issue on ‘Mechanistic studies in catalysis’, which encompasses novel and diverse research in both homogeneous and heterogeneous catalysis. The guest editors for this themed issue are Professors John Brown (University of Oxford), Andreas Pfaltz (University of Basel), and Rutger van Santen (Eindhoven University of Technology).

Here’s a few highlights from the issue:

Many more great contributions have been received, so make sure to have a look at the rest of the themed collection online now!

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