Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Rodlike molecules and singlet energy transfer(1)(,)(2)

Zimmerman1, Lapin, Nesterov

  • 1Chemistry Department of the University of Wisconsin, Madison, Wisconsin, 53706, USA.

The Journal of Organic Chemistry
|November 14, 2000
PubMed
Summary

Researchers synthesized novel rodlike molecules with bicyclo[2.2.2]octane units and an aromatic core. They found energy transfer efficiency decreased with increased molecular length, involving both through-bond and through-space mechanisms.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Sialosyl-Tn expression in benign and neoplastic proliferative lesions of the colon: of questionable value in predicting dysplasia.

Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland·2013
Same author

Abdominal compartment syndrome: does intra-cystic pressure reflect actual intra-abdominal pressure? A prospective study in surgical patients.

Critical care (London, England)·2000
Same author

Comparison of three oral appliances for treatment of severe obstructive sleep apnea syndrome.

Sleep medicine·2000
Same author

Interchain ion formation in secondary ion mass spectrometry resulting from the double-helical structure of isotactic poly(methyl methacrylate) in adsorbed monolayers

Analytical chemistry·2000
Same author

Nuclear and coulomb interaction in 8B breakup at sub-coulomb energies

Physical review letters·2000
Same author

Search for a 33.9 MeV/c(2) neutral particle in pion decay

Physical review letters·2000

Area of Science:

  • Organic Chemistry
  • Photochemistry
  • Materials Science

Background:

  • Rodlike molecules with bicyclo[2.2.2]octane units are investigated for their unique structural and electronic properties.
  • Previous studies explored shorter rod molecules ([1]- and [2]-rods) to understand energy transfer mechanisms.

Purpose of the Study:

  • To synthesize and investigate the photophysical properties of novel [3]-rods incorporating a central aromatic ring between bicyclooctyl units.
  • To evaluate the efficiency and mechanisms of singlet excitation energy transfer in these extended rodlike molecules.
  • To correlate energy transfer characteristics with molecular structure and electronic distribution.

Main Methods:

  • Synthesis of two [3]-rod molecules with specific terminal groups (alpha-naphthyl, acetyl, or benzoyl).

Related Experiment Videos

  • Fluorescence emission spectroscopy to detect energy transfer and assess efficiency.
  • Single photon counting measurements to determine singlet lifetimes.
  • Delta-density calculations to analyze electronic excitation distribution.

    • Main Results:

    • Excitation of the alpha-naphthyl moiety resulted in fluorescence emission from both naphthyl and acetyl units.
    • Singlet excitation energy transfer was less efficient in the [3]-rods compared to shorter analogs.
    • Energy transfer to the benzoyl group was faster than to the acetyl group.
    • Electronic excitation showed distribution within the bicyclooctyl units, indicating through-bond energy transfer.
    • Evidence suggests through-bond transfer dominates in shorter rods, while Förster through-space transfer becomes significant in longer rods.

    Conclusions:

    • Interposing an aromatic ring in rodlike molecules affects energy transfer efficiency.
    • Molecular length and the nature of terminal groups influence the rate and mechanism of energy transfer.
    • Through-bond and through-space energy transfer mechanisms play distinct roles depending on molecular architecture.