bacteriochlorophylls and hydroxide-ion

bacteriochlorophylls has been researched along with hydroxide-ion* in 2 studies

Other Studies

2 other study(ies) available for bacteriochlorophylls and hydroxide-ion

Article	Year
Synthesis of regioisomeric bacteriochlorophyll-d analogues possessing a hydroxy group at the 2(1)- or 3(1)-position: their chlorosome-like self-aggregation in solid films. The Journal of organic chemistry, 2009, Aug-21, Volume: 74, Issue:16 Zinc 2(1)- and 3(1)-hydroxy-13-carbonylhexaethylporphyrins 2 and 3 were synthesized by modifying easily available octaethylporphyrin, and the HPLC-separated regioisomers were fully characterized. The latter compound 3(1)-OH-13-C=O-3, which structurally resembled naturally self-aggregative bacteriochlorophyll-d (3(1)-OH/13-C=O), was preferable to make ordered J-aggregates in the solid film, compared to its regioisomeric 2(1)-OH-13-C=O-2. In contrast, more ordered oligomers were obtained by self-aggregation of zinc porphyrin 1 possessing the interactive moieties (3(1)-OH, Zn, 13-C=O) at the same positions, which was prepared by modifying natural chlorophyll-a molecule. The difference between self-aggregation of 1 and 3 was ascribable to the methyl and ethyl groups attached at the 2-position neighboring the 3(1)-OH group which is requisite for self-aggregation; the steric environment around the interactive OH group is important to make highly ordered supramolecules through strong molecular packings. Topics: Bacteria; Bacteriochlorophylls; Biomimetics; Chromatography, High Pressure Liquid; Hydroxides; Molecular Conformation; Photosynthesis; Stereoisomerism; Zinc	2009
Resonance Raman studies on the structure of bacteriochlorophyll c in chlorosomes from Chloroflexus aurantiacus. Journal of biochemistry, 1990, Volume: 108, Issue:5 Resonance Raman spectra of chlorosomes isolated from the thermophilic green photosynthetic bacterium Chloroflexus aurantiacus have been obtained with several excitation wavelengths from 441.6 to 514.5 nm. Resonance Raman spectra of bacteriochlorophyll (BChl) c isolated from C. aurantiacus cells have also been observed. The C=C stretching frequencies of BChl c in the chlorosomes were found to be at 1,556 (strong) and 1,544 (shoulder) cm-1, which correspond to those expected for the 5-coordinated BChl c. The C-9 carbonyl resonance Raman frequency was found at 1,642 cm-1, indicating that this group is either hydrogen-bonded to an Mg-coordinated hydroxyl group or coordinated to the Mg ion. Topics: Bacterial Proteins; Bacteriochlorophylls; Hydrogen Bonding; Hydroxides; Magnesium; Photobacterium; Spectrum Analysis, Raman	1990

Article

Year

Synthesis of regioisomeric bacteriochlorophyll-d analogues possessing a hydroxy group at the 2(1)- or 3(1)-position: their chlorosome-like self-aggregation in solid films.

The Journal of organic chemistry, 2009, Aug-21, Volume: 74, Issue:16

Zinc 2(1)- and 3(1)-hydroxy-13-carbonylhexaethylporphyrins 2 and 3 were synthesized by modifying easily available octaethylporphyrin, and the HPLC-separated regioisomers were fully characterized. The latter compound 3(1)-OH-13-C=O-3, which structurally resembled naturally self-aggregative bacteriochlorophyll-d (3(1)-OH/13-C=O), was preferable to make ordered J-aggregates in the solid film, compared to its regioisomeric 2(1)-OH-13-C=O-2. In contrast, more ordered oligomers were obtained by self-aggregation of zinc porphyrin 1 possessing the interactive moieties (3(1)-OH, Zn, 13-C=O) at the same positions, which was prepared by modifying natural chlorophyll-a molecule. The difference between self-aggregation of 1 and 3 was ascribable to the methyl and ethyl groups attached at the 2-position neighboring the 3(1)-OH group which is requisite for self-aggregation; the steric environment around the interactive OH group is important to make highly ordered supramolecules through strong molecular packings.

Topics: Bacteria; Bacteriochlorophylls; Biomimetics; Chromatography, High Pressure Liquid; Hydroxides; Molecular Conformation; Photosynthesis; Stereoisomerism; Zinc

2009

Resonance Raman studies on the structure of bacteriochlorophyll c in chlorosomes from Chloroflexus aurantiacus.

Journal of biochemistry, 1990, Volume: 108, Issue:5

Resonance Raman spectra of chlorosomes isolated from the thermophilic green photosynthetic bacterium Chloroflexus aurantiacus have been obtained with several excitation wavelengths from 441.6 to 514.5 nm. Resonance Raman spectra of bacteriochlorophyll (BChl) c isolated from C. aurantiacus cells have also been observed. The C=C stretching frequencies of BChl c in the chlorosomes were found to be at 1,556 (strong) and 1,544 (shoulder) cm-1, which correspond to those expected for the 5-coordinated BChl c. The C-9 carbonyl resonance Raman frequency was found at 1,642 cm-1, indicating that this group is either hydrogen-bonded to an Mg-coordinated hydroxyl group or coordinated to the Mg ion.

Topics: Bacterial Proteins; Bacteriochlorophylls; Hydrogen Bonding; Hydroxides; Magnesium; Photobacterium; Spectrum Analysis, Raman

1990