Bell, Toby D. M. et al. published their research in Australian Journal of Chemistry in 2009 | CAS: 57412-08-5

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Attachment of the ligand to the metal may be through a single atom, in which case it is called a monodentate ligand, or through two or more atoms, in which case it is called a didentate or polydentate ligand. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Formula: C47H36N4O

Synthesis and Photophysical Properties of a Conformationally Flexible Mixed Porphyrin Star-Pentamer was written by Bell, Toby D. M.;Bhosale, Sheshanath V.;Ghiggino, Kenneth P.;Langford, Steven J.;Woodward, Clint P.. And the article was included in Australian Journal of Chemistry in 2009.Formula: C47H36N4O The following contents are mentioned in the article:

The synthesis of a porphyrin star-pentamer bearing a free-base porphyrin core and four Zn(II) metalloporphyrins, which are tethered by a conformationally flexible linker about the central porphyrin’s antipody, is described. The synthetic strategy is highlighted using olefin cross metathesis to link the five chromophores together in a directed fashion in high yield. Photoexcitation into the Soret absorption band of the Zn porphyrin chromophores at 425 nm leads to a substantial enhancement of central free-base porphyrin fluorescence, indicating energy transfer from the photoexcited Zn porphyrin (outer periphery) to central free-base porphyrin. Time-resolved fluorescence decay profiles required three exponential decay components for satisfactory fitting. These are attributed to emission from the central free-base porphyrin and to two different rates of energy transfer from the Zn porphyrins to the free-base porphyrin. The faster of these decay components equates to an energy-transfer rate constant of 3.7 ¡Á 109 s-1 and an efficiency of 83%, whereas the other is essentially unquenched with respect to reported values for Zn porphyrin fluorescence decay times. The relative contribution of these two components to the initial fluorescence decay is ?3:2, similar to the 5:4 ratio of cis and trans geometric isomers present in the pentamer. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Attachment of the ligand to the metal may be through a single atom, in which case it is called a monodentate ligand, or through two or more atoms, in which case it is called a didentate or polydentate ligand. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Formula: C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI