Ultrafast singlet-singlet energy transfer between an acceptor electrostatically attached to the walls of an organic capsule and the enclosed donor

Shipra Gupta, Aniruddha Adhikari, Amit Kumar Mandal, Kankan Bhattacharyya, Vaidhyanathan Ramamurthy

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Ultrafast Forster resonance energy transfer (FRET) between a donor (coumarin dye) and a cationic acceptor (rhodamine 6G) situated within and on the exterior walls, respectively, of a bimolecular capsule made up of anionic octa-acid (OA) is studied by femtosecond up-conversion. 1D and 2D 1H NMR spectral analyses reveal that donors coumarin-1, coumarin-153, and coumarin-480 form a 1:2 complex (guest to host) and are enclosed within the OA capsule. NMR and emission spectra suggest that the cationic acceptor rhodamine 6G is attached to the anionic exterior walls of the OA capsule. The acceptor emission displays a rise component of 1-3 ps which corresponds to a donor-acceptor distance (RDA) of ∼13 Å and thus indicates the occurrence of ultrafast FRET between the donor and acceptor at close contact.

Original languageEnglish
Pages (from-to)9593-9600
Number of pages8
JournalJournal of Physical Chemistry C
Volume115
Issue number19
DOIs
StatePublished - May 19 2011

Fingerprint

capsules
Energy transfer
Capsules
energy transfer
rhodamine
acids
Acids
Nuclear magnetic resonance
nuclear magnetic resonance
emission spectra
Coloring Agents
Dyes
dyes
occurrences
Fluorescence Resonance Energy Transfer
coumarin
rhodamine 6G

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Ultrafast singlet-singlet energy transfer between an acceptor electrostatically attached to the walls of an organic capsule and the enclosed donor. / Gupta, Shipra; Adhikari, Aniruddha; Mandal, Amit Kumar; Bhattacharyya, Kankan; Ramamurthy, Vaidhyanathan.

In: Journal of Physical Chemistry C, Vol. 115, No. 19, 19.05.2011, p. 9593-9600.

Research output: Contribution to journalArticle

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