Volume 35, Issue 1 (January 1990)

    Intramolecular Energy Transfer in the Europium-Ruhemann's Purple Complex: Application to Latent Fingerprint Detection

    (Received 19 November 1988; accepted 3 February 1989)

    CODEN: JFSOAD

      Format Pages Price  
    PDF Version 11 $25   ADD TO CART


    Abstract

    The reaction product of ninhydrin with amino acids reacts further with europium chloride hexahydrate (EuCl3 · 6H2O) to form an organo-rare earth complex which exhibits Eu3+ luminescence at 615 nm with a lifetime of 0.4 ms. This emission is sensitized by intramolecular ligand to europium resonance energy transfer. Benzo(f)ninhydrin is better suited to this energy transfer process than ninhydrin and yields more intense Eu3+ emission. The emission is effectively excited by argon-ion laser near-ultraviolet (UV) light, which can be modulated such that time-resolved imaging can reveal amino acids on strongly fluorescent surfaces which would otherwise not be tractable. This is applied to the detection of latent fingerprints.


    Author Information:

    Menzel, ER
    Director, Center for Forensic Studies, and professor, Physics Department, Texas Tech University, Lubbock, TX

    Mitchell, KE
    Graduate student, Texas Tech University, Lubbock, TX


    Stock #: JFS12799J

    ISSN: 0022-1198

    DOI: 10.1520/JFS12799J

    ASTM International
    is a member of CrossRef.

    Author
    Title Intramolecular Energy Transfer in the Europium-Ruhemann's Purple Complex: Application to Latent Fingerprint Detection
    Symposium , 0000-00-00
    Committee E30