Hostname: page-component-8448b6f56d-qsmjn Total loading time: 0 Render date: 2024-04-23T12:35:10.784Z Has data issue: false hasContentIssue false

Comparative Study of the Photostability of Two Glycine Molecules in Different Medium

Published online by Cambridge University Press:  29 April 2019

Satish Kumar*
Affiliation:
Department of Physics and Computer Science, Dayalbagh Educational Institute, Dayalbagh, Agra-282005, India
Ashok Jangid
Affiliation:
Department of Physics and Computer Science, Dayalbagh Educational Institute, Dayalbagh, Agra-282005, India
Get access

Abstract

The photostability of two glycine molecules has been investigated using quantum mechanical methods i.e. at CASSCF/NEVPT2 level theory. It is found that the molecule in water shows vast photostability as a comparison to vacuum. The energies are calculated around HOMO and LUMO orbital. The NEVPT2 computed energies are reasonably matched with experimental results. The study shows that the molecule returns from higher electronically excited states to ground state through CI and AC crossings and these crossings provide a minimum energy path along derivative coupling and gradient differences vector.

Type
Articles
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Crespo-Hernández, C.E., et al. , Ultrafast excited-state dynamics in nucleic acids . Chemical reviews, 2004. 104(4): p. 1977-2020.CrossRefGoogle ScholarPubMed
Sobolewski, A.L. and Domcke, W., Computational Studies of the Photophysics of Hydrogen-Bonded Molecular Systems . The Journal of Physical Chemistry A, 2007. 111(46): p. 11725-11735.CrossRefGoogle ScholarPubMed
Dass, A.V., Cottin, H., and Brack, A., Photochemistry and Photoreactions of Organic Molecules in Space, in Biosignatures for Astrobiology. 2019, Springer. p. 205-222.CrossRefGoogle Scholar
Wiebeler, C., et al. , Excitation energies of canonical nucleobases computed by multiconfigurational perturbation theories . Photochemistry and photobiology, 2017. 93(3): p. 888-902.CrossRefGoogle ScholarPubMed
J. Von Neumann, E.W., Conical intersection theory and Computational. Physik. Z, 1929. 30.Google Scholar
Hammes-Schiffer, S., Mixed quantum/classical dynamics of hydrogen transfer reactions . The Journal of Physical Chemistry A, 1998. 102(51): p. 10443-10454.CrossRefGoogle Scholar
Roth, J.P., Lovell, S., and Mayer, J.M., Intrinsic barriers for electron and hydrogen atom transfer reactions of biomimetic iron complexes . Journal of the American Chemical Society, 2000. 122(23): p. 5486-5498.CrossRefGoogle Scholar
Frutos, L.M., et al. , Photoinduced Electron and Proton Transfer in the Hydrogen-Bonded Pyridine− Pyrrole System . The Journal of Physical Chemistry B, 2007. 111(22): p. 6110-6112.CrossRefGoogle ScholarPubMed
Marazzi, M., et al. , First principles study of photostability within hydrogen-bonded amino acids . Physical Chemistry Chemical Physics, 2011. 13(17): p. 7805-7811.CrossRefGoogle ScholarPubMed
Read, R.J., et al. , Structure of the complex of Streptomyces griseus protease B and the third domain of the turkey ovomucoid inhibitor at 1.8-A resolution . Biochemistry, 1983. 22(19): p. 4420-33.CrossRefGoogle ScholarPubMed
Neese, F., Software update: the ORCA program system, version 4.0 . Wiley Interdisciplinary Reviews: Computational Molecular Science, 2018. 8(1): p. e1327.Google Scholar
Crespo-Otero, R., et al. , Photo-stability of peptide-bond aggregates: N-methylformamide dimers . Physical Chemistry Chemical Physics, 2014. 16(35): p. 18877-18887.CrossRefGoogle ScholarPubMed
Serrano-Andrés, L. and Fülscher, M.P., Charge transfer transitions in neutral and ionic polypeptides: A theoretical study . The Journal of Physical Chemistry B, 2001. 105(38): p. 9323-9330.CrossRefGoogle Scholar