The effect of metal salt treatment on the photoluminescence of DFO-treated fingerprints

Conn, C; Ramsay, G; Roux, C; Lennard, C

The effect of metal salt treatment on the photoluminescence of DFO-treated fingerprints

Conn, C Ramsay, G Roux, C

Lennard, C

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Publication Type:: Journal Article
Citation:: Forensic Science International, 2001, 116 (2-3), pp. 117 - 123
Issue Date:: 2001-02-15

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Field	Value	Language
dc.contributor.author	Conn, C	en_US
dc.contributor.author	Ramsay, G	en_US
dc.contributor.author	Roux, C https://orcid.org/0000-0003-3610-420X	en_US
dc.contributor.author	Lennard, C https://orcid.org/0000-0002-9164-7103	en_US
dc.date.issued	2001-02-15	en_US
dc.identifier.citation	Forensic Science International, 2001, 116 (2-3), pp. 117 - 123	en_US
dc.identifier.issn	0379-0738	en_US
dc.identifier.uri	http://hdl.handle.net/10453/3243
dc.description.abstract	Ninhydrin developed fingerprints can be enhanced by treatment with a zinc or cadmium salt. The resulting fingerprint luminescence has been attributed to the induced coplanarity of the bicyclic indanedione rings of Ruhemann's purple due to complexation with the metal ions. This paper explores whether this effect also occurs in the 1,8-diaza-9-fluorenone (DFO)-amino acid adduct (1), formed from the reaction of DFO with amino acids. Molecular modeling studies of (1) indicate a relatively small out-of-plane angle of 24°. 1H NMR studies indicate (1) is asymmetric about the C2 axis in contrast to what has been previously reported. Little, if any, enhancement of luminescence was observed with Zn, Cd, Ru or Eu treated DFO developed latent fingerprints. This lack of enhancement was also borne out by solution luminescence studies. Given this lack of enhancement of luminescence, solutions of (1) and the four metal ions above were analyzed by electrospray mass spectrometry (ESMS). This indicated the formation of predominantly 1:1 complexes of (1) with both Zn and Cd, and the 2:1 complex with ruthenium. No evidence of a Eu complex was found by ESMS. Copyright © 2001 Elsevier Science Ireland Ltd.	en_US
dc.relation.ispartof	Forensic Science International	en_US
dc.relation.isbasedon	10.1016/S0379-0738(00)00358-3	en_US
dc.subject.classification	Legal & Forensic Medicine	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Europium	en_US
dc.subject.mesh	Cadmium	en_US
dc.subject.mesh	Ruthenium	en_US
dc.subject.mesh	Zinc	en_US
dc.subject.mesh	Aza Compounds	en_US
dc.subject.mesh	Amino Acids	en_US
dc.subject.mesh	Luminescent Measurements	en_US
dc.subject.mesh	Magnetic Resonance Spectroscopy	en_US
dc.subject.mesh	Spectrometry, Mass, Electrospray Ionization	en_US
dc.subject.mesh	Dermatoglyphics	en_US
dc.subject.mesh	Models, Molecular	en_US
dc.title	The effect of metal salt treatment on the photoluminescence of DFO-treated fingerprints	en_US
dc.type	Journal Article
utslib.citation.volume	2-3	en_US
utslib.citation.volume	116	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Chemistry and Forensic Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CFS - Centre for Forensic Science
utslib.copyright.status	closed_access
pubs.issue	2-3	en_US
pubs.publication-status	Published	en_US
pubs.volume	116	en_US

Abstract:

Ninhydrin developed fingerprints can be enhanced by treatment with a zinc or cadmium salt. The resulting fingerprint luminescence has been attributed to the induced coplanarity of the bicyclic indanedione rings of Ruhemann's purple due to complexation with the metal ions. This paper explores whether this effect also occurs in the 1,8-diaza-9-fluorenone (DFO)-amino acid adduct (1), formed from the reaction of DFO with amino acids. Molecular modeling studies of (1) indicate a relatively small out-of-plane angle of 24°. 1H NMR studies indicate (1) is asymmetric about the C2 axis in contrast to what has been previously reported. Little, if any, enhancement of luminescence was observed with Zn, Cd, Ru or Eu treated DFO developed latent fingerprints. This lack of enhancement was also borne out by solution luminescence studies. Given this lack of enhancement of luminescence, solutions of (1) and the four metal ions above were analyzed by electrospray mass spectrometry (ESMS). This indicated the formation of predominantly 1:1 complexes of (1) with both Zn and Cd, and the 2:1 complex with ruthenium. No evidence of a Eu complex was found by ESMS. Copyright © 2001 Elsevier Science Ireland Ltd.

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http://hdl.handle.net/10453/3243