Volume 1 Issue 7, July 2018

Volume 1 Issue 7

A light touch for polymers

Remote-controlling living polymerization processes by the flip of a light switch offers great potential for the synthesis of sophisticated macromolecules. Now, Eisenreich et al. have created a photoswitchable catalyst, which allows for control over both the length as well as the monomer incorporation into the growing polymer chain by illuminating with light of the proper wavelength.

See Eisenreich et al.

Image: Fabian Eisenreich and Michael Kathan (Humboldt University). Cover Design: Karen Moore.

Editorial

  • Editorial |

    Industrial publications are a very valuable and multifaceted tool for the wider catalysis community; they can foster the productive collaboration of university and corporate research laboratories, an essential partnership for the solution of important societal problems

Research Highlights

News & Views

  • News & Views |

    Pairing electrosynthetic anode and cathode processes (either convergent or divergent) is essential to maximize energy usage/sustainability and to minimize waste. New approaches to pairing in electrosynthesis are needed and the use of a palladium film membrane by Berlinguette and co-workers represents an effective paired reactor prototype that couples electrosynthesis with chemical catalysis.

    • Frank Marken
    •  & Steven D. Bull
  • News & Views |

    Control over the length and composition of polymers is key to controlling their properties. Now, a photoswitchable catalyst is shown to allow external control over reaction rates, chain lengths and even polymer composition in ring-opening polymerizations.

    • Paula K. Kuroishi
    •  & Andrew P. Dove
  • News & Views |

    The identification of organic structure-directing agents capable of tailoring the physicochemical properties of microporous materials has remained a challenge. Now, a unique methodology to design organic mimics of reaction intermediates provides a route to optimize the selectivity of zeolite catalysts.

    • Jeffrey D. Rimer

Reviews

  • Review Article |

    The artificial synthesis of ammonia remains one of the most important catalytic processes worldwide, over 100 years after its development. In this Review, recent developments in enzymatic, homogeneous and heterogeneous catalysis towards the conversion of nitrogen to ammonia are discussed, with a particular focus on how mechanistic understanding informs catalyst design.

    • Shelby L. Foster
    • , Sergio I. Perez Bakovic
    • , Royce D. Duda
    • , Sharad Maheshwari
    • , Ross D. Milton
    • , Shelley D. Minteer
    • , Michael J. Janik
    • , Julie N. Renner
    •  & Lauren F. Greenlee

Research

  • Article |

    Electrolysis uses clean electricity to form chemical products but typical water electrolysis produces hydrogen which is hard to store oxygen which is a waste gas. Here, paired electrolysis is performed with an palladium membrane reactor to carry out two organic reactions simultaneously. The dense palladium membrane enables the two reactions to proceed in different solvents and the reaction rates and selectivities can be independently controlled.

    • Rebecca S. Sherbo
    • , Roxanna S. Delima
    • , Valerie A. Chiykowski
    • , Benjamin P. MacLeod
    •  & Curtis P. Berlinguette
  • Article |

    The proper verification of the stability of metal oxide catalysts for water electrolysis in acid electrolyte remains unresolved. Here, the ‘stability number’ is introduced to evaluate the dissolution mechanisms of various iridium-based oxides and to facilitate benchmarking of catalysts independent of loading, surface area or involved active sites.

    • Simon Geiger
    • , Olga Kasian
    • , Marc Ledendecker
    • , Enrico Pizzutilo
    • , Andrea M. Mingers
    • , Wen Tian Fu
    • , Oscar Diaz-Morales
    • , Zhizhong Li
    • , Tobias Oellers
    • , Luc Fruchter
    • , Alfred Ludwig
    • , Karl J. J. Mayrhofer
    • , Marc T. M. Koper
    •  & Serhiy Cherevko
  • Article |

    The properties of polymers depend on monomer composition and chain length, but regulating these structural features during polymer synthesis is a challenge. Now Hecht and co-workers report a photoswitchable catalyst system that can repeatedly be switched between ON and OFF states, allowing remote control of the polymerization process. Furthermore, copolymerization with control over monomer incorporation is demonstrated.

    • Fabian Eisenreich
    • , Michael Kathan
    • , Andre Dallmann
    • , Svante P. Ihrig
    • , Timm Schwaar
    • , Bernd M. Schmidt
    •  & Stefan Hecht
  • Article |

    Organic synthesis relies on the ability to convert simple starting materials into compounds with greater molecular complexity. Here, Trost and co-workers use branched aldehydes as nucleophiles for asymmetric Mannich reactions, and the products of these reactions as electrophiles for the addition of a range of carbon nucleophiles. This provides a simple, stereodivergent route to 1,3-aminoalcohols.

    • Barry M. Trost
    • , Chao-I (Joey) Hung
    • , Tanguy Saget
    •  & Elumalai Gnanamani
  • Article |

    Predicting metal–support combinations that can afford stable single-atom catalysts remains a complex problem. Now, a computational method is reported that can be used to screen interaction strengths between metals and supports and identify those pairs that generate strongly adsorbed single-atom catalysts.

    • Nolan J. O’Connor
    • , A. S. M. Jonayat
    • , Michael J. Janik
    •  & Thomas P. Senftle
  • Article |

    Supported metal nanoparticles are indispensable catalysts in industry, yet they are often subjected to severe sintering. Now, a general method based on metal immobilization within zeolite is reported for the preparation of highly sinter-resistant catalysts for a broad range of industrially relevant processes.

    • Jian Zhang
    • , Liang Wang
    • , Bingsen Zhang
    • , Haishuang Zhao
    • , Ute Kolb
    • , Yihan Zhu
    • , Lingmei Liu
    • , Yu Han
    • , Guoxiong Wang
    • , Chengtao Wang
    • , Dang Sheng Su
    • , Bruce C. Gates
    •  & Feng-Shou Xiao
  • Article |

    Methanol-to-olefins (MTO) conversion over zeolites is a promising route for the production of light olefins. Now, Corma and co-workers show that using mimics of reaction intermediates as structure-directing agents allows the synthesis of highly selective zeolite MTO-catalysts.

    • Chengeng Li
    • , Cecilia Paris
    • , Joaquín Martínez-Triguero
    • , Mercedes Boronat
    • , Manuel Moliner
    •  & Avelino Corma