Fig. 2
From: Synthesis of ordered carbonaceous frameworks from organic crystals
Structure evolution of Ni2-CPDPy upon heat-treatment. a–c Photographs of (a) Ni2-CPDPy, (b) Ni2-CPDPy593(0), and (c) Ni2-CPDPy873(1). d Schematic representation of diacetylene chains (A) and Ni2-CPDPy molecules (B); P n = porphyrin unit (n = 1–6). e Molecular structure of d-(B): bottom illustration, <010> direction; each molecule is displayed in a different colour. f Larger area view: <001> direction; yellow part corresponds to the yellow moiety in e. g PXRD patterns of Ni2-CPDPy and heat-treated samples; inset: enlarged intense peaks of heat-treated samples. h–j Ni2-CPDPy593(0) packing structure. h Schematic representation of part corresponding to d. In (A), porphyrins locate next to those shown in (B) are indicated with the symbol, P n ’. i Molecular structure of h-(B): <010> direction. Coloured moieties correspond to those in e. j Larger area view from the <001> direction; yellow part corresponds to the yellow moiety in i. Red box in f and j is unit cell. k TEM image of Ni2-CPDPy593(0). l Expected molecular-level structure of Ni2-CPDPy873(1); an enlarged part (A) and a larger region (B) corresponding to j. For f, j, and l: C, H, N, O, Ni = black, light blue, green, red, and purple, respectively. m HAADF-STEM image of Ni2-CPDPy873(1). Scale bars in k and m are 10 nm
