Chlorophyll c

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Chlorophyll c is a form of chlorophyll found in certain marine algae, including the photosynthetic Chromista (e.g. diatoms, brown algae) and dinoflagellates.[1][2][3]

It has a blue-greenish color and is an accessory pigment, particularly significant in its absorption of light in the 447-452 nm region, [3] Like chlorophyll a and chlorophyll b, it helps the organism gather light and passes a quanta of excitation energy through the light harvesting antennae to the photosynthetic reaction centre. Chlorophyll c is unusual because it has a porphyrin ring structure and does not have an isoprenoid tail or a reduced ring D, features typical of the other chlorophylls commonly found in algae and plants.[2]

Chlorophyll c can be further divided into chlorophyll c1, chlorophyll c2[3] and chlorophyll c3,[4] plus at least 8 other newly found subtypes.[5]

Chlorophyll c1

Chlorophyll c1
Chlorophyll c1.svg
Chlorophyll c1 molecule
Names
IUPAC name
[(2E)-3-[14-Ethyl-21-(methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-9-vinyl-3,4-didehydro-3-phorbinyl-κ2N23,N25]acrylato(2-)]magnesium
Identifiers
ChemSpider 21865345
PubChem 25245630
Properties
C35H30MgN4O5
Molar mass 610.95 g·mol−1
Vapor pressure {{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chlorophyll c1 is a common form of chlorophyll c. It differs from chlorophyll c2 in its C8 group, having an ethyl group instead of vinyl group (C-C single bond instead of C=C double bond). Its absorption maxima are around 444, 577, 626 nm and 447, 579, 629 nm in diethyl ether and acetone respectively.[6]

Chlorophyll c2

Chlorophyll c2
Chlorophyll c2.svg
Chlorophyll c2 molecule
Names
IUPAC name
[(2E)-3-[21-(Methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-9,14-divinyl-3,4-didehydro-3-phorbinyl-κ2N23,N25]acrylato(2-)]magnesium
Identifiers
ChemSpider 21865346
PubChem 25244281
Properties
C35H28MgN4O5
Molar mass 608.94 g·mol−1
Vapor pressure {{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chlorophyll c2 is the most common form of chlorophyll c.[7] Its absorption maxima are around 447, 580, 627 nm and 450, 581, 629 nm in diethyl ether and acetone respectively.[6]

Chlorophyll c3

Chc3
Properties
C36H28MgN4O7
Molar mass 652.95 g·mol−1
Vapor pressure {{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Chlorophyll c3 is a form of chlorophyll c found in microalga Emiliania huxleyi, identified in 1989.[4] Its absorption maxima are around 452, 585, 625 nm and 452, 585, 627 nm in diethyl ether and acetone respectively.[6]

References

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