Electron spin polarization transfer from a nitroxide incarcerated within a nanocapsule to a nitroxide in the bulk aqueous solution

Steffen Jockusch, Olaf Zeika, Nithyanandhan Jayaraj, Vaidhyanathan Ramamurthy, Nicholas J. Turro

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A thioxanthone derivative containing a covalently attached 15N-labeled nitroxide was incarcerated into an octaacid nanocapsule. Photoexcitation of the thioxanthone chromophore generated electron spin polarization of the nitroxide. This spin polarization of the 15N-labeled nitroxide was transferred through the walls of the carcerand to a 14N-labeled nitroxide in external bulk solvent, a process that was directly observed by time-resolved EPR spectroscopy. The efficiency of the communication between the incarcerated guest and molecules in the bulk solvent was shown to be controlled by supramolecular factors such as Coulombic attraction and repulsion between the guest@host complex and charged molecules in the bulk solvent phase.

Original languageEnglish
Pages (from-to)2628-2632
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume1
Issue number18
DOIs
StatePublished - Sep 16 2010

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Nanocapsules
Spin polarization
electron spin
aqueous solutions
Electrons
polarization
Molecules
Photoexcitation
Chromophores
photoexcitation
chromophores
attraction
Paramagnetic resonance
molecules
communication
Spectroscopy
Derivatives
Communication
spectroscopy
thioxanthone

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Electron spin polarization transfer from a nitroxide incarcerated within a nanocapsule to a nitroxide in the bulk aqueous solution. / Jockusch, Steffen; Zeika, Olaf; Jayaraj, Nithyanandhan; Ramamurthy, Vaidhyanathan; Turro, Nicholas J.

In: Journal of Physical Chemistry Letters, Vol. 1, No. 18, 16.09.2010, p. 2628-2632.

Research output: Contribution to journalArticle

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