Chlorophylls

Synthesis of 3‐arylated chlorophyll‐a derivatives via Diels–Alder reaction and their atropisomerism

“…The spectral shape showed that 1a was a monomeric species in the diluted solution. 29 The spectrum of 1a was almost identical to that of its atropisomer 1b (see the upper panels of Figure 4A/B). The consistency indicated that the 3-aryl groups of 1a/b were nearly perpendicular to their chlorin π-systems and did not affect the spectra stereoselectively.…”

“…Between the two bands, three less intense Qy(0,1), Qx(0,0), and Qx(0,1) bands were visible at 607, 538, and 507 nm, respectively. The spectral shape showed that 1a was a monomeric species in the diluted solution 29 . The spectrum of 1a was almost identical to that of its atropisomer 1b (see the upper panels of Figure 4A/B).…”

Determination of N‐centered stereochemistry in N22‐methylated chlorophyll‐a derivatives and their epimer‐dependent optical spectra

“…Chlorophylls (Chls) are the most abundant pigments in phototrophs and function in light‐harvesting and energy‐migrating antennas and electron‐transferring reaction centers 1,2 . Chl molecules are stereochemically pure compounds within photosynthetic organisms 3,4 . Specifically, Chl‐ a is found in oxygenic phototrophs including higher plants, algae, and cyanobacteria, 5–7 and its molecular structure is illustrated in the left drawing of Figure 1.…”

Predicted Structure of the BciC Enzyme Catalyzing the Removal of the C132-Methoxycarbonyl Group for Biosynthesis of Chlorosomal Chlorophylls: A Mechanism for Dual Catalytic Functions of Hydrolysis and Decarboxylation inside Its Active Site

“…Chlorophylls (Chls) play key roles in the initial stage of photosynthesis including sunlight absorption, excited energy transfer, and charge separation. − Their molecular design enables optimization of the various roles in photosynthesis by enzymatic modifications of their peripheral functional groups and skeletons in the biosynthetic pathway. , We focused on Chls in Chlorobaculum (C.) tepidum, one species of green sulfur bacteria. C.…”

“…19−21 Their molecular design enables optimization of the various roles in photosynthesis by enzymatic modifications of their peripheral functional groups and skeletons in the biosynthetic pathway. 22,23 We focused on Chls in Chlorobaculum (C.) tepidum, one species of green sulfur bacteria. C. tepidum has three types of Chls, Chl-a, bacteriochlorophyll (BChl) a, and BChl-c molecules.…”