Watch out Beowulf, David Leigh of the University of Manchester has made much finer chainmail (yes, that reference was solely from the cover of the book; I saw it as a kid and now chainmail is forever associated with Beowulf in my mind). A couple of hundred years after we stopped using chainmail (it was good at stopping swords; not so much bullets) we’ve finally started producing it again.
The molecule is made of two interconnected rings, with a whopping 114 atoms each. At each bend (there are six of them) is an iron atom surrounded by organic ligands (bipyridine derivatives, if you want to get fancy). In the middle sits a PF6– ion that apparently refuses to leave.
Chemists have been trying to make this molecule, nicknamed the “Star of David catenane” because in chemistry even your nickname has to be scientifically meaningful, for half a decade. Leigh, in a press release from Manchester University, gave full credit to his graduate student, Alex Stephens, before giving the typical why-did-you-do-this answer: “It was a great day when Alex finally got it in the lab. In nature, biology already uses molecular chainmail to make the tough, light shells of certain viruses and now we are on the path towards being able to reproduce its remarkable properties.”
In my Google search for “molecular chainmail” (because I had never heard the term before), I came across a book called “Beauty in Chemistry: Artistry in the Creation of New Molecules” and because that title was too intriguing they added the subtitle of “(Topics in Current Chemistry)”. The book is from 2012 so maybe we’ll see some more interesting molecules coming out soon. This kind of work goes to show that one can find beauty even in the smallest things.