Fig. 1: Rational design of ionic-bonding network-induced organic room-temperature phosphorescence materials.
From: Rigid ionic-bonding networks boosting organic room temperature phosphorescence

a Comparison of hydrogen bond and ionic bond. The color change from blue to red indicates an increase in bond energy. b Constructing ionic-bonding networks for organic room-temperature phosphorescence composites through quaternary ammonium alkyl chain matching principle in host/guest structures. The ionic nodes and external heavy atom effect can facilitate the phosphorescence emission. c Chemical structures of host and guest materials.