@susannah Non-scientist explanation:

Coordination polymers are a class of material where I take a couple of units and link them together into a larger structure. Think of lego, where I can take two different shapes and link them into a larger structure. In this case, I'm making long stacks of them, or chains. So think of me linking together a bunch of 2x2 green lego squares and 2x4 black lego rectangles.