Oligo(maleic anhydride)s: a platform for unveiling the mechanism of clusteroluminescence of non-aromatic polymers
Luminescent materials without conventional aromatic groups have attracted more and more attentions in recent years. However, the luminescent mechanism is still obscure and under debate. In this paper, through experimental investigation of the oligo(maleic anhydride)s (OMAhs) as well as the alternative polymer of poly[(maleic anhydride)-alt-(2,4,4-trimethyl-1-pentene)] (PMP) as well as the copolymers containing different ratio of OMAhs, we propose the luminescence of OMAhs stem from the cluster. Moreover, a clearer mechanism of clusteroluminescence was provided with the assistance of theoretical simulation, which attribute to the intra- and inter-chain n → π* interaction of carbonyl groups of SAh units in OMAhs. Thus, this work might inspire a new route for designing the luminescent materials with nonconventional groups.