Retaining individualities: the photodynamics of self-ordering porphyrin assemblies

Abstract

Retained photochemical properties – a simple porphyrin–polyDMA conjugate with the ability to self assemble into large (∼1 μm) vesicles in water. The photodynamics are remarkably preserved despite the extensive aggregation.

Antimicrobial Photodynamic Polymeric Films Bearing Biscarbazol Triphenylamine End-Capped Dendrimeric Zn(II) Porphyrin

“…These minor spectral changes in absorbance spectrum and the fluoresce properties of the film suggest that the π–π stacking between the porphyrin cores is impeded and only takes place with a weak coupling interaction. This fact can be explained as result of the repulsive interactions between the polymer chains . In addition, axial ligand coordination can occur between the triazole unit and the metal center on the porphyrin.…”

Observing and Understanding the Ultrafast Photochemistry in Small Molecules: Applications to Sunscreens

“…the formation of the I and CN fragments) could be observed on a femtosecond timescale. Since then, this pioneering technique used to study simple dissociation reactions has been applied to a plethora of physical, chemical and biological systems, with examples ranging from understanding fundamental quantum dynamics 32 to energy transfer in photosynthetic antennas 33 and porphyrin biomimics 34 . The key in all these experiments is the use of ultrashort lasers pulses, which typically have a duration of <100 fs, in what is known as a pump-probe setup.…”

Water-dispersible glycosylated poly (2,5’-thienylene)porphyrin-based nanoparticles for antibacterial photodynamic therapy

“…Another strategy is to convert directly the hydrophobic porphyrin derivatives into water dispersible nanostructures. [24][25][26][27][28][29][30][31][32][33][34] This approach is especially highly attractive because photosensitizers which are ionic and carry charges usually exhibit dark toxicity and are effective on Gram positive bacteria but not on Gram negative bacteria. 35 A number of porphyrin-based nanostructures have been reported, however, they usually have a limited dye-loading content and as a result, low singlet-oxygen production efficiency as a photosensitizer.…”