Abstract
A sandwich-type dimer, namely (μ-oxo)bis[tetrakis(p-bromophenyl-porphyrinato)iron(III)], [(TBPP)Fe]2O, was prepared under solvothermal conditions and structurally characterized for the first time. Its self-assembly behavior has been comparatively investigated with the monomer [(TBPP)Fe]Cl by electronic absorption spectroscopy, scanning electron microscopy (SEM), and powder X-ray diffraction (PXRD) with the help of single crystal analysis. The optical properties of both compounds were studied by an open aperture Z-scan technique, revealing their good third-order nonlinear optical (NLO) properties. In particular, the μ-oxo dimer shows an about one order of magnitude larger two-photon absorption (TPA) cross-section (σ) value than the monomer due to its more extended conjugated electronic structure.
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