Braces, curly brackets, squiggles, sideways moustaches, l33t hugs - call them what you will. Math and science lovers use them to say "hey, here's a set of things." We liked that, because we're talking chemistry, and we hold a set of values, too. We also find their shape quite beautiful. So we're using them. Enjoy.
It's dialogue, not monologue.
It's attraction, not call-to-action.
It's emotional, not promotional.