Photophysical studies of newly derivatized mono substituted phthalocyanines grafted onto silica nanoparticles via click chemistry

Azides and Porphyrinoids: Synthetic Approaches and Applications. Part 2—Azides, Phthalocyanines, Subphthalocyanines and Porphyrazines

“…0.65) increased significantly when compared to those of the precursor phthalocyanine complexes (0.45), but decreased after the grafting to the SiNPs. On the other hand, the triplet lifetimes of all hybrids increased in comparison to the lifetimes of the non-immobilized ZnPcs and this behavior was justified by considering a possible protection provided by the polymeric silica nanoparticles to the phthalocyanines in the triplet state [15].…”

“…The CuAAC reaction has been used for the modification of silica nanoparticles and in their subsequent conjugation with organic molecules, namely with Pcs. For example, Nyokong and co-workers described the synthesis of the mono-substituted zinc(II) phthalocyanines ZnPc4a-c bearing terminal alkynyl units and their conjugation with silica nanoparticles functionalized with azido groups (Scheme 4) [15]. The alkynyl-substituted phthalocyanines were prepared by reacting the adequate carboxyphenoxyphthalocyanines with hex-5-yn-1-ol in the presence of the coupling agents N,N'-dicyclohexylcarbodiimide (DCC) and 4-(dimethylamino)pyridine (DMAP); the conjugation with the azido-nanoparticles was performed in THF/H 2 O, at room temperature, in the CuAAC conditions (Scheme 4).…”

Impact of photosensitizer orientation on the distance dependent photocatalytic activity in zinc phthalocyanine–nanoporous gold hybrid systems

“…The attachment of photosensitizers, especially of phthalocyanines or porphyrins derivatives, employing this method is a quite common synthesis strategy for the preparation of various hybrid materials. [58][59][60][61][62] Although used frequently, the characterization of as prepared hybrid materials is oen challenging, which might be the reason that little is known about the orientation of the macromolecules in such hybrid systems. However, especially when investigating photoinduced interactions, the orientation can have a crucial impact on the overall donor-acceptor distance and therefore possible interactions between immobilized sensitizers and free functional groups of the SAM need to be taken into consideration and discussed properly in the context of new hybrid materials.…”

Sulfonated octa‐substituted Co(II) phthalocyanines immobilized on silica matrix as catalyst for Thiuram E synthesis

“…The possible way to avoid aggregation of phthalocyanines metal complex is immobilization of the compound on organic or inorganic polymer matrixes . Graphene, carbon nanotubes, polymer oxides of, for example, silicon, titanium, zirconium are the most prospective solid‐phase carriers.…”