A spoonful of sugar makes the catalytic activity go down! [Dalton Trans.]

I’m delighted to finally publish this work, the first of my research carried out during my Marie Curie Fellowship in University of Bern to come out. A lot of hard work by Erasmus student Pauline went into gathering data behind this manuscript where we asked the question – what impact would incorporating carbohydrates into the structure of a Ruthenium(II)-triazolylidene complex have on its ability to convert a ketone to an alcohol via transfer hydrogenation catalysis.

There were challenges in isolating the desired compound, so it had to be generated in situ, but we were able to assess the activity, and the results were interesting, and can be found in detail here in Dalton Transactions.

To summarise the conclusions: The carbohydrate functionality does impact catalytic activity (transfer hydrogenation of ketones). In complexes with the glucose directly triazolylidene-bound,  turnover rates were substantially higher when compared to more remote carbohydrate functionalisation (i.e. with an ethylene spacer). Both new complexes, however, have reduced activity compared to  unfunctionalised carbene complexes. Insight was also gained into the nature of the catalytic cycle through a substrate scope analysis.

Exclaves in Switzerland (Minisode)

Exclaves in Switzerland (Minisode)

A very personal episode of 80 Days, marking the close of the Swiss chapter of my life. I’ll always have fond memories of the quirky aspects of Switzerland, but it’s definitely time to move home.

80 Days

In this minisode, Joe explores, literally, the idea of an exclave after wandering into one a couple of years ago. Although we’ve covered a couple of enclaves in the past (including San Marino and The Gambia), this episode is the first time we’ve examined the opposite concept – a tiny piece of a country marooned inside another’s borders.

This is also something of a personal episode for Joe (@anbeirneach), as it marks an end to his time living in Switzerland. Luke (@thelukejkelly) and Mark (@markboyle86) also feature, and we discuss briefly our upcoming fourth season, which is due in a couple of weeks.

For the curious, you can find more on the German enclave of Büsingen am Hochrhein here on Atlas Obscura, or read this article on BigThink. The New York Times article quoted in the episode can be found here

View original post 272 more words