Fig. 3: Growth process and the pore structure verification of COFs. | Nature Communications

Fig. 3: Growth process and the pore structure verification of COFs.

From: Synthesis of a covalent organic framework with hetero-environmental pores and its medicine co-delivery application

Fig. 3: Growth process and the pore structure verification of COFs.

a BET specific surface area values and PXRD patterns of DEG-HEP-COF recorded at different reaction time. b BET specific surface area values and PXRD patterns of DEG-COF recorded at different reaction time. c SEM image of DEG-HEP-COF recorded at 14 d. d STM image of DEG-HEP-COF. STM image obtained by co-condensation of TAPP and DEG-HEP-CHO with thermal annealing in water atmosphere. Imaging parameters: Iset = 60 pA, Vbias = –0.6 V. e The RTE of tetragons with different chain orientations. Case-4 shows four alkyl chains in the same hole. Case-3 shows three alkyl chains in the same hole. Case-2-1 and Case-2-2 shows two alkyl chains in the same hole, which are in ortho-position and in para-position, respectively. (For c, d, three independent samples were recorded, and 1 representative image is shown. The high-resolution version of e  is included in the Supplementary information, Supplementary Fig. 38). Source data are provided as a Source Data file.

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