K+-Induced in situ self-assembly of near-infrared luminescent membrane material armored with bigger Yb(iii) complex crystallites†
Abstract
A semi-rigid ligand could capture effectively Yb3+ ions to form a stable Yb3+ complex and provide a potential cavity to accommodate alkali metal ions. Only K+ ions could induce the Yb3+ complex to form a 1D coordination polymer and promote the in situ formation of an NIR membrane coated with bigger Yb3+ complex crystallites under mild conditions.