The effect of zinc chloride, humidity and the substrate on the reaction of 1,2-indanedione-zinc with amino acids in latent fingermark secretions

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dc.contributor.author Spindler, X
dc.contributor.author Shimmon, R
dc.contributor.author Roux, C
dc.contributor.author Lennard, C
dc.date.accessioned 2012-02-02T05:27:26Z
dc.date.issued 2011-10-10
dc.identifier.citation Forensic Science International, 2011, 212 (1-3), pp. 150 - 157
dc.identifier.issn 0379-0738
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/14646
dc.description.abstract Anecdotal evidence from forensic practitioners and studies conducted under controlled conditions have indicated that the reaction between 1,2-indanedione and the amino acids present in latent fingermark deposits is highly susceptible to ambient humidity. The addition of catalytic amounts of zinc chloride to the 1,2-indanedione working solution - usually in the order of 1:25 to 1:4 molar ratio (indanedione:zinc) - significantly improves the colour and luminescence of fingermarks treated under dry conditions but appears to have a negligible effect on fingermarks treated in humid environments. The results presented in this paper confirmed that zinc(II) ions added to the 1,2-indanedione working solution act as a Lewis acid catalyst, stabilising a key intermediate during a rate-limiting hydrolysis step. Furthermore, studying the reaction using a chromatography-grade cellulose substrate method previously reported confirmed that cellulose substrates play a major role in facilitating the indanedione-amino acid reaction by acting as a surface catalyst in the early stages of the reaction and by directing the formation of the desired luminescent product (Joullié's Pink). © 2011 Elsevier Ireland Ltd.
dc.language eng
dc.relation.isbasedon 10.1016/j.forsciint.2011.06.005
dc.title The effect of zinc chloride, humidity and the substrate on the reaction of 1,2-indanedione-zinc with amino acids in latent fingermark secretions
dc.type Journal Article
dc.parent Forensic Science International
dc.journal.volume 1-3
dc.journal.volume 212
dc.journal.number 1-3 en_US
dc.publocation Clare, Ireland en_US
dc.identifier.startpage 150 en_US
dc.identifier.endpage 157 en_US
dc.cauo.name SCI.Chemistry and Forensic Sciences en_US
dc.conference Verified OK en_US
dc.for 039902 Forensic Chemistry
dc.personcode 0000016451
dc.personcode 960382
dc.personcode 980366
dc.personcode 102605
dc.percentage 100 en_US
dc.classification.name Forensic Chemistry en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords 1,2-indanedione
dc.description.keywords Amino acids
dc.description.keywords Fingermarks
dc.description.keywords Indanedione-zinc
dc.description.keywords Joullié's Pink
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Forensic Science
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)
utslib.collection.history Closed (ID: 3)


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