Photophysical efficiency-boost of aqueous aluminium phthalocyanine by hybrid formation with nano-clays

Abstract

Novel organic-inorganic hybrid materials comprising nanoscaled layered silicates and native aluminium hydroxide phthalocyanine (Al(OH)Pc) allowed for the first time the exploitation of their unique photophysical properties in aqueous ambience. In particular, we were able to observe the efficient emission of Al(OH)Pc-nanoclay hybrids and generation of singlet oxygen in aqueous solution.

Labeling and Selective Inactivation of Gram‐Positive Bacteria Employing Bimodal Photoprobes with Dual Readouts

“…Moreover, Si IV phthalocyanine‐loaded layered nanoclays developed in our labs have shown a remarkable efficiency in the selective inactivation of antibiotic‐resistant Gram‐positive pathogens. , Despite their potential for diagnostics or therapy, it is clear that the long term toxicity associated to the permanence of aluminosilicate‐based nanoparticles in living organisms and in the environment severely limit their application. Therefore, biocompatible and biodegradable photosensitizers based on luminescent Si IV phthalocyanine‐based PS would constitute ideal theranostic agents for the directed fluorescent labeling and inactivation of pathogens, provided that they can be conjugated with a broad range of tailored targeting units that can be selected according to the microorganism.…”

cis-Cyclooctene epoxidation catalyzed by bulk metallophthalocyanines, metallohexadecafluorophthalocyanines and hollow silica-supported metallohexadecafluorophthalocyanine

“…The CuF 16 Pc-SiO 2 sample was dispersed in concentrated sulfuric acid (98%). The CuF 16 Pc was leached into solution, and the filtered solution was measured at 818 nm [28]. The calibration curve of CuF 16 Pc was established with three different concentrations (0.015, 0.037, and 0.074 mg/ml) of CuF 16 Pc in concentrated sulfuric acid.…”

Towards optimisation of surface enhanced photodynamic therapy of breast cancer cells using gold nanoparticle-photosensitiser conjugates

“…Zinc 2,9,16,23-tetra-tert-butyl-29H,31H-phthalocyanine (ZnPc-ref) was used as the reference, as it is known to have a fluorescence quantum yield of 0.33 in toluene. 26 Free C3Pc (0.52 mg) was dissolved in THF (2 mL) to give an initial concentration of 111 μM. C3Pc-PEG-AuNPs dissolved in MES buffer at an initial C3Pc concentration of 3.6 μM were used.…”