Fig. 4
From: Nanographenes as electron-deficient cores of donor-acceptor systems
Synthesis and crystal of 4 and optical absorption. a optimized synthetic route for 4. b the crystal structure of 4 represented by 4a. The thermal ellipsoids were set at 30% probability level. c UV-Vis absorption spectra of 3, 4a, 5, and 6a. Notably, the molar absorption coefficients of 3, 4, and 6 were listed in Supplementary Figs. 47–49, while that of 5 can not be measured due to its extremely low solubility
