Unusual conformational preference of an aromatic secondary urea: solvent-dependent open-closed conformational switching of N,N '-bis(porphyrinyl)urea

[摘要]：N,N'-Bis(2,3,7,8,12,13,17,18-octaethylporphyrin-5-yl)urea (3) exhibits cis-trans conformational switching depending on the solvent properties, and can adopt the cofacial porphyrin dimer structure under certain conditions. The conformational preference can be switched by electrochemical stimulus.

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