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2. Photosensitizer - Wikipedia

   en.wikipedia.org/wiki/Photosensitizer

   The excited, triplet state photosensitizer then reacts with a substrate molecule which is not molecular oxygen to both form a product and reform the photosensitizer. Type I photosensitized reactions result in the photosensitizer being quenched by a different chemical substrate than molecular oxygen.

3. Triplet state - Wikipedia

   en.wikipedia.org/wiki/Triplet_state

   Examples of atoms in singlet, doublet, and triplet states. In quantum mechanics, a triplet state, or spin triplet, is the quantum state of an object such as an electron, atom, or molecule, having a quantum spin S = 1. It has three allowed values of the spin's projection along a given axis m S = −1, 0, or +1, giving the name "triplet".

4. Non-photochemical quenching - Wikipedia

   en.wikipedia.org/wiki/Non-photochemical_quenching

   Triplet chlorophyll is a potent photosensitiser of molecular oxygen forming singlet oxygen which can cause oxidative damage to the pigments, lipids and proteins of the photosynthetic thylakoid membrane. To counter this problem, one photoprotective mechanism is so-called non-photochemical quenching (NPQ), which relies upon the conversion and ...

5. Spin chemistry - Wikipedia

   en.wikipedia.org/wiki/Spin_chemistry

   The spin relationship is such that the two unpaired electrons, one in each radical molecule, may have opposite spin (singlet; anticorrelated), or the same spin (triplet; correlated). The singlet state is called such because there is only one way for the electrons’ spins to anticorrelate (S), whereas the triplet state is called such because ...

6. Light-harvesting complexes of green plants - Wikipedia

   en.wikipedia.org/wiki/Light-harvesting_complexes...

   The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem. The antenna pigments are predominantly chlorophyll b, xanthophylls, and ...

7. Hexazinone - Wikipedia

   en.wikipedia.org/wiki/Hexazinone

   Hexazinone binds to a protein of the photosystem II complex, which blocks the electron transport. The result are multiple following reactions. The result are multiple following reactions. First triplet-state chlorophyll reacts with oxygen to form singlet oxygen .