具有空间位阻的强碱 ;The focal 1,8-naphthalimide fluorophores in the antennae were modified with 1,2,2,6,6-pentamethylpiperidine to improve their photostability1,2,2,6,6-Pentamethylpiperidine (PMP) was used as an organic structure directing agent (OSDA) in the synthesis of the RTH-type zeolites.