Molecular structure and spectroscopy of a bacteriopurpurin. A new class of bacteriochlorin photosensitizers

Article Abstract:

The synthesis, spectral characterization and structural determination of a metal-free bacteriopurpurin, a paradigm for a new class of photosensitizers comprised of porphyrins at the saturation level of bacteriochlorins flanked by two annelated, exocyclic rings were reported. A very red-shifted Qy transition at 843 nm was exhibited by the molecule asn was readily oxidized to a pi cation radical with a distinctive EPR signal. The first stereochemical parameters for this new class of expanded bacteriochlorins was provided by the crystallographic results for bacteriopurpurin.

Crystallography, Molecular structure, Photochemotherapy

---

Supramolecular structures of the chlorophyll a' aggregate and the origin of the diastereoselective separation of chlorophyll a and a'

Article Abstract:

The supramolecular structure of the aggregate chlorophyll a' (Chl a') was examined in comparison with that of the Chl a aggregate in aqueous alcohol solutions. Infrared, resonance Raman and small-angle X-ray scattering measurements were performed on lyophilized precipitates of the aggregate colloids. The difference between the supramolecular structures of the Chl a and a' aggregates does not depend on the steric hindrance between the bulky substituents at the C13 2 and C17 positions but on the potential for forming rigid intermolecular hydrogen bonding networks.

Analysis, Hydrogen bonding, Hydrogen bonds, Colloids, Cell aggregation, Chlorophyll, Intermolecular forces

---

Similar abstracts:

• Abstracts: Nitrogen fixation by nitrogenases: a quantum chemical study. Acidic property of MFI-type gallosilicate determined by temperature-programmed desorption of ammonia
• Abstracts: Bistable conduction electron spin resonance in metallic lithium particles. part 2 Dynamics of electron injection and recombination of dye-sensitized TiO2 particles
• Abstracts: Heterogeneous ECE processes at channel electrodes: analytical theory. Distinguishing hetero- and homogeneous ECE reactions. part 2
• Abstracts: J- and H-aggregates of porphyrin-surfactant complexes: time-resolved fluorescence and other spectroscopic studies. part 2
• Abstracts: Chaos during the reduction of iodate in alkaline solution: geometrical effect of the electrode. Electrode modification from the electrolysis of (M(bipyridine)3)(ClO4)2(M = Co(super II), Fe(super II), and Ru(super II)) in media of low dielectric constant. Electrocatalytic behavior and an amperometric C60 sensor

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.