How many magnesium ions does chlorophyll a have?

Chlorophyll A is an organic compound with molecular formula of C55H72MgN4O5 and molecular weight of 893.489, which is a waxy solid. The molecular structure of chlorophyll a is composed of four pyrrole rings connected by four methyl alkenyl groups (= ch-) to form a cyclic structure, which is called porphyrin (with side chains on the rings).

Chlorophyll A is an important pigment in various pigments of phytoplankton. In phytoplankton, 1% [kg- 1.3 mm] ~ 2% of the dry weight of organic matter is an index for estimating primary productivity and biomass, and it is also a necessary item for red tide monitoring.

Edible green pigment. Used for cakes, drinks, liqueurs, etc. In fact, plant leaves or dried powder are often used directly. Such as tea powder, mugwort leaves, spinach, Chlorella, etc. Adding chewing gum can eliminate bad breath. Chlorophyll is used for coloring soap, mineral oil, wax and essential oil. Derivatives of chlorophyll or chlorophyllin, such as copper chlorophyllin [11006-34-1], sodium iron chlorophyllin and sodium copper chlorophyllin, are used as colorants and deodorants in food, candy, beverage and toothpaste. Chlorophyll derivatives can be used as the formula of smelly cosmetics together with bromogeramine, haloalkane and other fungicides. [ 1][2]

Chinese name

chlorophyll a

Foreign name

chlorophyll a

molecular weight

893.489

Chemical abstracts service registration number

479-6 1-8

melting point

About 152.3℃

The main elements of basic information mainly play a physiological role.

Basic information

The molecular structure of chlorophyll a is composed of four pyrrole rings connected by four methyl alkenyl groups (= ch-) to form a cyclic structure, which is called porphyrin (with side chains on the rings). There are 1 magnesium atoms in the center of porphyrin ring, and cyclopentanone (ⅴ). Propionic acid on the IV ring is esterified and saponified by chlorophyllin (C20H39OH, molecular weight 893) into potassium salt, which is water-soluble.

In acidic environment, magnesium in porphyrin ring can be replaced by H, which is called pheophytin and is brown. When H is replaced by copper or zinc, its color turns green again. This pigment is very stable, does not fade in light and will not be destroyed by acid. This is the advantage of preserving soaked plant specimens.

In photosynthesis, most chlorophyll is used to absorb and transmit light energy, and only a few chlorophyll a molecules are used to convert light energy. They may combine with protein in vivo and exist on thylakoid membrane.

Complete structure of chlorophyll a

Molecular structure diagram of chlorophyll a

major element

Carbon, nitrogen, oxygen, hydrogen and magnesium

major function

1. Both chlorophyll a and chlorophyll b can absorb light energy. But only a few chlorophyll a in excited state can convert light energy into electric energy.

2. The ratio of chlorophyll a to chlorophyll b reflects how much light energy plants use.

For example, the ratio of chlorophyll a to chlorophyll b in sunny plants is large, and the ratio of chlorophyll a to chlorophyll b in shady plants is small.

physiological action

Chlorophyll A in plants can not only carry out photosynthesis, but also have a positive effect on human body.

Spirulina is the most abundant plant in the world, and its chlorophyll is mainly chlorophyll a, which is 2-3 times that of other plants. In addition, the chlorophyll molecule of spirulina contains porphyrin, whose structure is very similar to human and animal heme, and it is the direct raw material of human and animal heme, so chlorophyll a can be called "green blood". Because spirulina is rich in iron, the perfect combination of chlorophyll a and iron in spirulina is the best partner to treat iron deficiency anemia.

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reference data

[1] chlorophyll a. chemical source network [citation date 2020- 12- 18]

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Common pigments in chloroplasts

detail

chlorophyll

Chlorophyll is a green pigment in higher plants and all other photosynthetic organisms. There are many kinds of chlorophyll, such as chlorophyll a,

chlorophyll a

Chlorophyll A is an organic compound with molecular formula of C55H72MgN4O5 and molecular weight of 893.489, which is a waxy solid. The molecular structure of chlorophyll a consists of four parts.

Chlorophyll b

Chlorophyll b is a chemical substance with the molecular formula of C55H70MgN4O6. Chlorophyll B is a kind of chlorophyll, which absorbs and transmits light as one of antenna pigments in photosynthesis.

carotenoid

Carotenoid is an important natural pigment, which generally exists in yellow, orange or red animals, higher plants, fungi and algae.

xanthophyll

Lutein, alias plant lutein, is a carotenoid with the chemical formula of C40H56O2, which widely exists in vegetables, fruits, flowers and other plants.

renieratene

Carotene is the main source of vitamin A, mainly in three forms: α, β and γ, of which β -carotene is the most important. The main food sources are dark vegetables and fruits. it

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