Conformation changes of dimeric zinc(II) porphyrins induced by binding of bidentate ligands

Self-Organized Porphyrin Dimer as a Highly Specific Receptor for Pyrazine Derivatives

“…Interestingly both signals due to free and complexing pyrazine and the 1·Zn dimer can be observed independently in the titration. Pyrrole protons of 1·Zn appear at δ 8.34 ppm (free) and δ 8.28 ppm (complexed), and pyrazine signals appear at δ 8.59 ppm (free) and δ 1.57 ppm (complexed), respectively …”

Oxygen Activation Chemistry of Pacman and Hangman Porphyrin Architectures Based on Xanthene and Dibenzofuran Spacers

“…To this end, host-guest chemistry of the DPD platform was developed by using stable adducts that were amenable to structural and spectroscopic scrutiny. Sanders' approach (22)(23)(24)(25)(26)(98)(99)(100)(101)(102)(103)(104)(105)(106)(107)(108)(109) of using multifunctional zinc(II) porphyrin hosts with neutral nitrogen donors to form Lewis acid-base inclusion complexes provided an attractive starting point for this strategy. For our purposes, pyrimidine-based guests were selected for investigation.…”

Cyanide Coordination to Iron(III) Porphyrins and Covalently Linked Diiron(III) Diporphyrins

“…This provides an indication of the diporphyrin configuration. 30 The chemical shifts of monomeric mono-substituted porphyrins are taken to be the convenient monomeric reference; selected values are collected in Table 1. In the series studied we have observed noticeable external contribution in the neighborhood of the link only in the case of or/Ao-linked diporphyrins.…”

“…The intercept outside the normal diamagnetic position (-20 ppm, Figure 7, trace a) is expected for high-spin iron(III) systems with significant zero-field splitting. [26][27][28][29][30][31] The dipolar contribution due to the ZFS term is dependent on '"2 which usually produces the curvatures of Curie plots.…”