Qhov sib txawv tseem ceeb ntawm photodissociation thiab photoionization yog tias photodissociation yog kev tawg ntawm cov tshuaj lom neeg vim yog kev ua ntawm photons whereas photoionization yog kev sib cuam tshuam ntawm photons thiab atoms lossis molecules hauv cov qauv tsim ionic hom.
Hauv luv luv, ob qho tib si, photodissociation thiab photoionization, yog cov txheej txheem ntawm lub cev uas piav txog kev cuam tshuam ntawm photons thiab atoms lossis molecules.
Photodissociation yog dab tsi?
Photodissociation yog txheej txheem lub cev uas muaj tshuaj lom neeg tawg vim yog kev ua ntawm photons. Peb tuaj yeem txhais nws raws li kev sib cuam tshuam ntawm ib lossis ntau dua photons nrog ib lub hom phiaj molecule. Tsis tas li ntawd, cov txheej txheem no tsis txwv rau qhov pom kev pom. Qhov no txhais tau tias; ib qho photon uas muaj lub zog txaus los cuam tshuam rau cov khoom siv tshuaj lom neeg ntawm cov tshuaj lom neeg tuaj yeem ua rau cov txheej txheem photodissociation. Tsis tas li ntawd, lub zog ntawm photon yog inversely proportional rau lub wavelength ntawm nws EMR. Yog li ntawd, EMR nrog lub zog siab lossis me me wavelength tuaj yeem koom nrog hauv kev cuam tshuam photodissociation.
Ib qho piv txwv ntawm photodissociation yog photolysis hauv photosynthesis. Photolysis yog lub teeb-nyob ntawm cov tshuaj tiv thaiv uas tshwm sim raws li ib feem ntawm Hill cov tshuaj tiv thaiv ntawm photosynthesis. Cov tshuaj tiv thaiv tuaj yeem muab tau raws li hauv qab no.
H2A + Photons ⇒ 2e + 2H+ + A
Dhau li ntawm, photoacids yog cov molecules uas tuaj yeem nkag mus rau photodissociation thaum lub teeb haum, ua rau kev hloov pauv ntawm proton los ua photobase. Ntawm no, qhov dissociation tshwm sim nyob rau hauv ib qho hluav taws xob zoo siab lub xeev. `
Photoionization yog dab tsi?
Photoionization yog txheej txheem lub cev uas cov ion tsim los ntawm cov tshuaj tiv thaiv ntawm photon thiab atom lossis molecule. Txawm li cas los xij, peb tsis tuaj yeem categorize tag nrho cov kev sib cuam tshuam ntawm photons thiab atoms lossis molecules li photoionization vim qee qhov kev sib cuam tshuam tsim cov hom tsis-ionized; Yog li ntawd, peb yuav tsum muaj kev cuam tshuam kev cuam tshuam rau lub photoionization cross-section ntawm cov tshuaj hom. Tsis tas li ntawd, qhov no photoionization cross-section nyob ntawm lub zog ntawm photon thiab cov khoom ntawm cov tshuaj lom neeg uas tab tom ua haujlwm.
Daim duab 1: Photoionization, uas ua rau ib zaug pom tsis pom filaments hauv qhov chaw sib sib zog nqus ci
Multi-photon ionization yog ib hom photoionization uas ob peb photons muab lawv lub zog rau ionize ib atom lossis ib lub molecule. Ntawm no, lub zog ntawm photons yuav tsum qis dua qhov pib ntawm ionization zog.
Ntxiv rau hom saum toj no, qhov ionization yog lwm hom kev siv hluav taws xob photoionization qhov twg lub laser siv rau cov txheej txheem photoionization tau nce, lossis siv lub wavelength ntev dua, tso cai rau ntau cov duab ionization tshwm sim. Qhov tshwm sim ntawm cov txheej txheem no yog qhov cuam tshuam ntawm lub peev xwm atomic nyob rau hauv ib txoj kev uas tsuas yog ib qho qis thiab nqaim barrier ntawm ib tug bound sate thiab lub continuum xeev. Ntawm no, cov khoom siv hluav taws xob tuaj yeem dhau los ntawm kev thaiv. Cov no yog hu ua lub qhov ionization thiab hla qhov barrier ionization feem.
Qhov txawv ntawm Photodissociation thiab Photoionization yog dab tsi?
Photodissociation thiab photoionization yog cov txheej txheem ntawm lub cev. Qhov sib txawv tseem ceeb ntawm photodissociation thiab photoionization yog tias photodissociation yog kev tawg ntawm cov tshuaj lom neeg vim yog kev ua ntawm photons thaum photoionization yog kev cuam tshuam ntawm photons thiab atoms lossis molecules hauv cov qauv los tsim hom ionic.
Hauv qab infographic muab cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm photodissociation thiab photoionization.
Summary – Photodissociation vs Photoionization
Photodissociation thiab photoionization yog cov txheej txheem ntawm lub cev. Qhov sib txawv tseem ceeb ntawm photodissociation thiab photoionization yog tias photodissociation yog kev tawg ntawm cov tshuaj lom neeg vim yog kev ua ntawm photons whereas photoionization yog kev sib cuam tshuam ntawm photons thiab atoms lossis molecules hauv cov qauv los tsim hom ionic.
