Multiporphyrin Arrays on Cyclophosphazene Scaffolds: Synthesis and Studies was written by Pareek, Yogita;Ravikanth, Mangalampalli. And the article was included in Chemistry – A European Journal in 2012.SDS of cas: 57412-08-5 The following contents are mentioned in the article:
The stable and robust cyclotriphosphazene and cyclotetraphosphazene rings were used as scaffolds to prepare hexa- and octaporphyrin arrays by treating N3P3Cl6 and N4P4Cl8, resp., with 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl)porphyrin (N4 core) or with its thiaporphyrin analogs (N3S and N2S2 cores) in THF in the presence of Cs2CO3 under simple reaction conditions. Thiaporphyrins were examined in addition to the normal porphyrin to tune the electronic properties of the resultant arrays. Observation of the mol. ion peaks in the mass spectra confirmed the mol. structures of the arrays. 1-dimensional and 2-dimensional NMR techniques were employed to characterize the multiporphyrin arrays. The 1H NMR spectra of the multiporphyrin arrays each show a systematic set of signals, indicating that the porphyrin units are arranged in a sym. fashion around the cyclophosphazene rings. All signals in the 1H NMR spectra were assigned with the aid of COSY and NOESY experiments The protons of each porphyrin unit are subject to upfield and downfield shifts because of the ring-current effects of neighboring porphyrin units. Optical, electrochem., and fluorescence studies of the arrays indicated that the porphyrin units retain their independent ground- and excited-state characteristics. CuII and NiII derivatives of hexaporphyrin and octaporphyrin arrays containing N4 porphyrin units and N3S porphyrin units were synthesized, and complete metalation of the arrays was confirmed by their mass spectra and by detailed NMR characterization of the NiII derivatives of hexa- and octaporphyrin arrays containing N4 porphyrin units. Electrochem. studies indicated that CuII and NiII ions present in the thiaporphyrin units of the arrays can be stabilized in the +1 oxidation state, which is not possible with arrays containing normal porphyrin units. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5SDS of cas: 57412-08-5).
4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Catalytic transformations have become a mainstay in the toolkit of the synthetic and increasing non-synthetic chemist alike. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.SDS of cas: 57412-08-5
Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI