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Issue 21, 2013

Investigation by two-color IR dissociation spectroscopy of Hoogsteen-type binding in a metalated nucleobase pair mimic

Author affiliations

Abstract

Two AgI ions, deprotonated 1-methyl-thymine (1MT-H) and 1,3-dideaza-adenine (DDA), self-assemble in methanolic solution to a cationic [(Ag)2(1MT-H)(DDA)]+ complex as identified by electrospray ionization mass spectrometry. Assignment of vibrational bands and identification of the silver coordination pattern arise from comparison of one- and two-color Infrared Multiple Photon Dissociation (IRMPD) spectra (1000–4000 cm−1) of isolated and trapped complexes to calculated spectra from density functional theory. This approach reveals two structurally and energetically close isomers that resemble a metalated Hoogsteen-like binding motif. The two color IR/IR double resonance scheme proved in particular useful to observe weakly absorbing or weakly fragmenting vibrational modes.

Graphical abstract: Investigation by two-color IR dissociation spectroscopy of Hoogsteen-type binding in a metalated nucleobase pair mimic

Supplementary files

Article information


Submitted
29 Nov 2012
Accepted
03 Apr 2013
First published
05 Apr 2013

Phys. Chem. Chem. Phys., 2013,15, 8171-8178
Article type
Paper

Investigation by two-color IR dissociation spectroscopy of Hoogsteen-type binding in a metalated nucleobase pair mimic

Y. Nosenko, F. Menges, C. Riehn and G. Niedner-Schatteburg, Phys. Chem. Chem. Phys., 2013, 15, 8171 DOI: 10.1039/C3CP44283G

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