A porphyrin tripod (DPZnT) connected through a triazole bridge was prepared as a monomeric building block for guest-induced supramolecular polymerization. Although the lone pair electrons in triazolic nitrogen potentially bind to the zinc porphyrin units through axial ligation, the intrinsic steric hindrance suppressed the coordination of the triazole bridge to the porphyrin unit in DPZnT. Therefore, DPZnT formed spherical nanoparticles through π-π interactions. The addition of 1,3,5- tri(pyridin-4-yl)benzene (Py3B) caused the guest-induced fibrous supramolecular polymerization of DPZnT by forming a 1:1 host. guest complex, which was further assembled into a fibrous polymer. Furthermore, addition of Cl. to DPZnT induced the transformation of spherical nanoparticles to networked supramolecular polymers. The fibrous and networked supramolecular polymers of DPZnT obtained by adding Py3B or Cl. were depolymerized to their original spherical particles after adding Cu(ClO4)2 or AgNO3, respectively.
|Number of pages||8|
|Publication status||Published - 2022 Jun 28|
Bibliographical noteFunding Information:
This work was supported by the Mid-Career Researcher Program (2020R1A2C3004520 and 32022R1A2C2012889) funded by the National Research Foundation (NRF) of Korea. Experiments at PLS (Beamline 9A) were supported in part by MSIP and POSTECH.
© 2022 American Chemical Society.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry