Porphyrin–Polymer Networks, Worms, and Nanorods: pH-triggerable Hierarchical Self-assembly
✍ Scribed by Christian Ruthard; Manfred Schmidt; Franziska Gröhn
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 555 KB
- Volume
- 32
- Category
- Article
- ISSN
- 1022-1336
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
In this study, we present a novel, multifaceted pH‐triggerable system of self‐organized hierarchical nanostructures. The system consists of meso‐tetrakis(4‐sulfonatophenyl)porphyrin (TPPS) and poly(2‐vinylpyridine) cylindrical brushes (PVP brushes) and can yield polymer–porphyrin networks, porphyrin loaded polymer brushes and pure porphyrin nanorods. In addition, the polymer influences the p__K__~a~ and the mutual TPPS stacking geometry. Structures were characterized by AFM, dynamic light scattering using an IR laser, UV–Vis spectroscopy and small‐angle neutron scattering (SANS). Supramolecular composite porphyrin structures that can be switched through external triggers have potential in photodynamic tumor therapy (PDT) and for nanoelectronics. magnified image