Dual emission N-doped carbon dot@benzotrithiophene tricarbaldehyde-terephthalic dihydrazide covalent organic framework

Abstract

N-doped carbon dot (NCD)@COF_BTT–Th nanosheets with strong dual-emission fluorescence are prepared by encapsulating NCDs into COF_BTT–Th through amine–aldehyde dehydration condensation between benzotrithiophene tricarbaldehyde and terephthalic dihydrazide. The fluorescence of COF_BTT–Th is enhanced because of fluorescence resonance energy transfer and the decrease of interlaminar accumulation and intramolecular rotation.