What is photochemical reaction in organic chemistry?
photochemical reaction, a chemical reaction initiated by the absorption of energy in the form of light. The consequence of molecules’ absorbing light is the creation of transient excited states whose chemical and physical properties differ greatly from the original molecules.
What are the photochemical reactions?
Definition: Refers to any chemical reaction which occurs as a result of light energy from the sun. For example, ozone is formed through a photochemical reaction involving nitrogen dioxide and reactive organic compounds. Source: DNREC online A history of air pollution events.
What is photochemical reaction with example?
Most common example of a photochemical reaction is photosynthesis. In photosynthesis plants use sunlight and water to convert carbon dioxide into glucose (Carbohydrates) and oxygen. Reaction is given below – 6CO2 + 6H2O sunlight → C6H12O6 + 6O2. Some other examples of photochemical reactions are given below –
How many types of photochemical reactions are there?
Types of photochemical reactions (from top): [3+2] photocycloaddition of azirines to C = C, [2+2] photocycloaddition of C = C to C = O, [4+2] and [4+4] photocycloaddition of olefins to carbon-only aromatic rings, [2+2] photocycloaddition of C = C to C = C, [3+2] photocycloaddition of s-triazolo[4,3-b]pyridazine to C = …
What is photochemical reaction in atmosphere?
Photochemical reaction take place in atmosphere by the absorption of solar radiation in the ultraviolet region. Absorption of photons by chemical species gives rise to electronically excited molecules, which can bring about certain reactions.
What does the term photochemical mean?
Definition of photochemical 1 : of, relating to, or resulting from the chemical action of radiant energy and especially light photochemical smog. 2 : of or relating to photochemistry photochemical studies.
What is an example of a photochemical?
Examples of photochemical reactions Photosynthesis: plants use solar energy to convert carbon dioxide and water into glucose and oxygen. Human formation of vitamin D by exposure to sunlight. Bioluminescence: e.g. In fireflies, an enzyme in the abdomen catalyzes a reaction that produced light.
What is the best definition of a photochemical?
What is the photochemical phase?
The photochemical phase of photosynthesis is also known as light reaction. It is responsible for the formation of high-energy chemical intermediates, ATP and NADPH, and it includes light absorption, water splitting and release of oxygen.