Three-Dimensional Fully Conjugated Covalent Organic Frameworks from a Hexaconnected sp 2 -Carbon Building Unit - Jie Zhang; Chuanbao Jiao; Haorui Zheng; Yiji Wang; Zitao Wang; Bo Miao; Zhansong Shi; Hui Li; Valentin Valtchev; Shilun Qiu; Qianrong Fang (Journal of the American Chemical Society, 2026)