Dual built-in electric fields in donor–acceptor engineered poly(triazine imide) for selective lignin Cα–Cβ bond cleavage to aromatic monomers - Xudong Guo; Huifang Ma; Youheng Zhao; Hao Nie; Liping Zhao; Shuangzhen Guo; Linglong Shi; Da Li; Jianjie Wang (Journal of Environmental Chemical Engineering, 2026)