Relative Axial Ligand Orientation in Bis(imidazole)iron(II) Porphyrinates: Are “Picket Fence” Derivatives Different?

Violin timbre and the picket fence

Synthesis and characterization of a modified "picket fence" porphyrin complex - stronger π bonding interactions between Fe(ii) and axial ligands.

A new, modified "picket fence" porphyrin is synthesized and its bis(imidazole)-ligated iron(ii) derivative [Fe(MbenTpivPP)(1-MeIm)(2)] is investigated. X-ray structure determinations demonstrate that [Fe(MbenTpivPP)(1-MeIm)(2)] has structural features of a near planar porphyrin plane, a relative perpendicular ligand orientation, and one unusually large absolute ligand orientation (φ). The combi...

Photosensitizing activities of picket fence porphyrins in vitro and in vivo.

A set of structurally distinct o-substituted tetraphenylporphyrins, the picket fence porphyrins, were evaluated for their ability to photosensitize tumor mitochondria in vitro, in vivo-in vitro, and tumor implants in situ. Differential photosensitized inactivation efficiencies toward mitochondrial enzymes in vitro are reported for the 12 compounds studied as a function of side chain length and ...

Imagining the White Picket Fence: Social Class, Future Plans, and Romantic Relationship Quality

Previous research has established that individuals from a lower social class report lower relationship quality. However, to date, no studies have examined interdependence processes within the relationship as a mechanism underlying this association. The present research investigates the role of planned tangible investments as a mediator between social class and relationship quality. Across two s...

Cooperativity in 02 binding to iron porphyrins ( hemoglobin / ferrous hemes / myoglobin / " picket fence " metalloporphyrinates )

The solid-gas 02 binding equilibrium has been studied for ferrous "picketfence" porphyrinates with sterically hindered axial imicazoles. Such systems show significant cooperativity in their binding of 02: at low 02 pressures a low 02 affinifo exists, and at high 02 pressures a higher 02 affinity form develops. Direct analogies are drawn to the cooperativity shown in Oi binding by hemoglobin. Th...