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Vacuum ultraviolet excited state dynamics of small amides

Authors :
Larsen, Martin A.B.
Sølling, Theis I.
Forbes, Ruaridh
Boguslavskiy, Andrey E.
Makhija, Varun
Veyrinas, Kévin
Lausten, Rune
Stolow, Albert
Zawadzki, Magdalena M.
Saalbach, Lisa
Kotsina, Nikoleta
Paterson, Martin J.
Townsend, Dave
Larsen, Martin A.B.
Sølling, Theis I.
Forbes, Ruaridh
Boguslavskiy, Andrey E.
Makhija, Varun
Veyrinas, Kévin
Lausten, Rune
Stolow, Albert
Zawadzki, Magdalena M.
Saalbach, Lisa
Kotsina, Nikoleta
Paterson, Martin J.
Townsend, Dave
Source :
Larsen , M A B , Sølling , T I , Forbes , R , Boguslavskiy , A E , Makhija , V , Veyrinas , K , Lausten , R , Stolow , A , Zawadzki , M M , Saalbach , L , Kotsina , N , Paterson , M J & Townsend , D 2019 , ' Vacuum ultraviolet excited state dynamics of small amides ' , Journal of Chemical Physics , vol. 150 , no. 5 , 054301 .
Publication Year :
2019

Abstract

Time-resolved photoelectron spectroscopy in combination with ab initio quantum chemistry calculations was used to study ultrafast excited state dynamics in formamide (FOR), N,N-dimethylformamide (DMF), and N,N-dimethylacetamide (DMA) following 160 nm excitation. The particular focus was on internal conversion processes within the excited state Rydberg manifold and on how this behavior in amides compared with previous observations in small amines. All three amides exhibited extremely rapid (<100 fs) evolution from the Franck-Condon region. We argue that this is then followed by dissociation. Our calculations indicate subtle differences in how the excited state dynamics are mediated in DMA/DMF as compared to FOR. We suggest that future studies employing longer pump laser wavelengths will be useful for discerning these differences.

Details

Database :
OAIster
Journal :
Larsen , M A B , Sølling , T I , Forbes , R , Boguslavskiy , A E , Makhija , V , Veyrinas , K , Lausten , R , Stolow , A , Zawadzki , M M , Saalbach , L , Kotsina , N , Paterson , M J & Townsend , D 2019 , ' Vacuum ultraviolet excited state dynamics of small amides ' , Journal of Chemical Physics , vol. 150 , no. 5 , 054301 .
Notes :
application/pdf, English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1263225698
Document Type :
Electronic Resource