An anionic two dimensional covalent organic framework from tetratopic borate centres pillared by lithium ions oleh Darosch Asgari, Julia Grüneberg, Yunkai Luo, Hüseyin Küçükkeçeci, Samrat Ghosh, Veniamin Chevelkov, Sabrina Fischer-Lang, Jérôme Roeser, Adam Lange, Bruce Dunn, Michael Gradzielski, Arne Thomas