DNA-like Photophysics in Self-Assembled Silver(I)-Nucleobase Nanofibers.

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ID: 2682
2019
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Abstract
Supramolecular assemblies form when silver nitrate is added to an aqueous solution of adenine (Ade) or 2-aminopurine (2AP) in a 2:1 mole ratio. Atomic force microscopy images reveal nanofibers that are ∼30 nm in diameter and micrometers in length in the dried film formed from a room-temperature solution. Femtosecond broadband transient absorption spectroscopy was used to investigate the dynamics of excited states formed by UV excitation of the nanofibers in room-temperature aqueous solutions in an effort to learn how nonradiative decay pathways of the uncomplexed nucleobases are altered in the silver-ion-mediated assemblies. The changes in the spectroscopy and dynamics of Ade and 2AP upon forming nanofibers with silver ions closely parallel the ones seen when these bases are organized into DNA strands. The similarities strongly suggest that these structures feature extensive π-π stacking interactions between nucleobases. The results show that time-resolved spectroscopy combined with growing understanding of the photophysics of DNA strands can deliver new insights into the properties of metal-nucleobase nanoassemblies.
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snyder2019dnalikethe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Snyder, Joshua A;Charnay, Aaron P;Kohl, Forrest R;Zhang, Yuyuan;Kohler, Bern;
Journal the journal of physical chemistry b
Year 2019
DOI
10.1021/acs.jpcb.9b00660
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