Ballistic energy transport along PEG chains: distance dependence of the transport efficiency

Physical Chemistry Chemical Physics : PCCP
Zhiwei LinIgor V Rubtsov

Abstract

Dual-frequency relaxation-assisted two-dimensional infrared (RA 2DIR) spectroscopy was used to investigate energy transport in polyethylene glycol (PEG) oligomers of different length, having 0, 4, 8, and 12 repeating units and end-labeled with azido and succinimide ester moieties (azPEGn). The energy transport initiated by excitation of the N≡N stretching mode of the azido group in azPEGn in CCl(4) at ca. 2100 cm(-1) was recorded by probing the C=O stretching modes (reporters) of the succinimide ester moiety. Sensitive to the excess energy delivered to the reporter modes, RA 2DIR permits observation of both the through-bond and through-solvent energy transport contributions. The cross-peak data involving the reporter modes with different thermal sensitivity and the data for mixtures of compounds permitted concluding that through-bond energy transport is the dominant mechanism for most cross peaks in all four azPEGn compounds. The through-bond energy transport time, evaluated as the waiting time at which the cross peak maximum is reached, was found to be linearly dependent on the chain length of up to 60 Å, suggesting a ballistic energy transport regime. The through-bond energy transport speed determined from the chain-length de...Continue Reading

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Citations

Aug 26, 2015·Accounts of Chemical Research·Natalia I RubtsovaIgor V Rubtsov
Jan 13, 2015·Annual Review of Physical Chemistry·Jianqiang MaFeng Gai
Mar 10, 2015·Annual Review of Physical Chemistry·Natalia I Rubtsova, Igor V Rubtsov
Jun 8, 2015·The Journal of Chemical Physics·Natalia I RubtsovaIgor V Rubtsov
Jul 28, 2016·The Journal of Chemical Physics·Arkady A KurnosovAlexander L Burin
May 6, 2016·Physical Chemistry Chemical Physics : PCCP·Lev Chuntonov
Sep 3, 2017·The Journal of Chemical Physics·Hari Datt Pandey, David M Leitner
Jan 17, 2019·The Journal of Chemical Physics·Igor V Rubtsov, Alexander L Burin
Apr 10, 2021·The Journal of Chemical Physics·Tammy X LeongIgor V Rubtsov
May 22, 2020·The Journal of Physical Chemistry Letters·Robert T MackinIgor V Rubtsov
May 6, 2015·The Journal of Physical Chemistry. B·Yuankai YueIgor V Rubtsov
Nov 19, 2019·The Journal of Physical Chemistry. a·Andrew J SchmitzMatthew J Tucker
Apr 5, 2014·The Journal of Physical Chemistry. B·Natalia I RubtsovaIgor V Rubtsov
Jun 29, 2018·The Journal of Physical Chemistry. B·Hari Datt Pandey, David M Leitner

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