photodissociationn.

Brit.

/ˌfəʊtə(ʊ)dᵻˌsəʊʃɪˈeɪʃən/,

/ˌfəʊtə(ʊ)dᵻˌsəʊsɪˈeɪʃn/, U.S.

/ˈˌfoʊdoʊdəˌsoʊʃiˈeɪʃ(ə)n/,

/ˈˌfoʊdoʊdəˌsoʊsiˈeɪʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: photo- comb. form, dissociation n.

Etymology: < photo- comb. form + dissociation n. Compare later photodissociate v.

Chemistry and Physics.

Dissociation of a molecule or a subatomic particle by the action of light.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > study of chemical action of light > dissociation

photodissociation1907

1907 Proc. Royal Soc. 1906–7 A. 78 468 When the incident light is cut off, the reverse reaction is no longer opposed by the photo-dissociation.

1925 London, Edinb., & Dublin Philos. Mag. 6th Ser. 49 1166 It becomes of interest..to investigate the relation between the activation, and the frequency of the illumination;..only recently has a similar investigation been made on the photo-dissociation of sulphur dioxide.

1936 Physical Rev. 49 904/1 The photo-dissociation of deuterons by γ-rays.

1974 Sci. Amer. June 29/1 Atomic iodine is prepared in the proper excited state by the photodissociation of gaseous compounds such as iodotrifluoromethane (CF₃I) with xenon flash lamps.

1994 Sci. News 24 Sept. 199/2 The energized oxygen arises by photodissociation, a process whereby the sun's energy breaks up high-altitude ozone and other oxygenated molecules.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	photodissociation
释义	photodissociationn. Brit. /ˌfəʊtə(ʊ)dᵻˌsəʊʃɪˈeɪʃən/, /ˌfəʊtə(ʊ)dᵻˌsəʊsɪˈeɪʃn/, U.S. /ˈˌfoʊdoʊdəˌsoʊʃiˈeɪʃ(ə)n/, /ˈˌfoʊdoʊdəˌsoʊsiˈeɪʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, dissociation n. Etymology: < photo- comb. form + dissociation n. Compare later photodissociate v. Chemistry and Physics. Dissociation of a molecule or a subatomic particle by the action of light. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > scientific effects of light > [noun] > study of chemical action of light > dissociation photodissociation1907 1907 Proc. Royal Soc. 1906–7 A. 78 468 When the incident light is cut off, the reverse reaction is no longer opposed by the photo-dissociation. 1925 London, Edinb., & Dublin Philos. Mag. 6th Ser. 49 1166 It becomes of interest..to investigate the relation between the activation, and the frequency of the illumination;..only recently has a similar investigation been made on the photo-dissociation of sulphur dioxide. 1936 Physical Rev. 49 904/1 The photo-dissociation of deuterons by γ-rays. 1974 Sci. Amer. June 29/1 Atomic iodine is prepared in the proper excited state by the photodissociation of gaseous compounds such as iodotrifluoromethane (CF₃I) with xenon flash lamps. 1994 Sci. News 24 Sept. 199/2 The energized oxygen arises by photodissociation, a process whereby the sun's energy breaks up high-altitude ozone and other oxygenated molecules. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1907
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