Persistent radical anion of perylene dianhydride: an emerging metal-free photocatalyst for near-infrared photocontrolled RAFT polymerizationperylene二酐的持久自由基阴离子: 用于近红外光控RAFT聚合的新兴无金属光催化剂SCIENCE CHINA-CHEMISTRYIF9.72023-10-114PRE