Abstract To introduce crown ethers into the struts of metal–organic frameworks (MOFs), general approaches have been developed for the syntheses of dicarboxylic acid dibenzo [30] crown-10 (DB30C10DA), dicarboxylic acid di-2, 3-naphtho [30] crown-10 (DN30C10DA), dicarboxylic acid bisparaphenylene [34] crown-10 (BPP34C10DA), and dicarboxylic acid 1, 5-naphthoparaphenylene [36] crown-10 (NPP36C10DA). These novel ...