title: Visualising substrate-fingermark interactions: Solid-state NMR spectroscopy of amino acid reagent development on cellulose substrates.
abstract: Most spectroscopic studies of the reaction products formed by ninhydrin, 1,2-indanedione-zinc (Ind-Zn) and 1,8-diazafluoren-9-one (DFO) when reacted with amino acids or latent fingermarks on paper substrates are focused on visible absorption or luminescence spectroscopy. In addition, structural elucidation studies are typically limited to solution-based mass spectrometry or liquid nuclear magnetic resonance (NMR) spectroscopy, which does not provide an accurate representation of the fingermark development process on common paper substrates. The research presented in this article demonstrates that solid-state carbon-13 magic angle spinning NMR ((13)C-MAS-NMR) is a technique that can not only be utilised for structural studies of fingermark enhancement reagents, but is a promising technique for characterising the effect of paper chemistry on fingermark deposition and enhancement. The latter opens up a research area that has been under-explored to date but has the potential to improve our understanding of how fingermark secretions and enhancement reagents interact with paper substrates.
authors.affiliation: Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW, Australia. Electronic address: Xanthe.Spindler@uts.edu.au.
authors.forename: Xanthe
authors.initials: X
authors.lastname: Spindler
authors.affiliation: Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW, Australia.
authors.forename: Ronald
authors.initials: R
authors.lastname: Shimmon
authors.affiliation: Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW, Australia.
authors.forename: Claude
authors.initials: C
authors.lastname: Roux
authors.affiliation: National Centre for Forensic Studies, University of Canberra, Bruce, ACT 2601, Australia. Electronic address: c.lennard@uws.edu.au.
authors.forename: Chris
authors.initials: C
authors.lastname: Lennard
mesh_terms: D000409:Alanine / Q000737:chemistry; D001372:Aza Compounds / Q000737:chemistry; D002247:Carbon Isotopes; D002482:Cellulose / Q000737:chemistry*; D003878:Dermatoglyphics; D005260:Female; D006801:Humans; D007189:Indans / Q000737:chemistry; D007202:Indicators and Reagents / Q000737:chemistry; D007510:Isatin / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D009555:Ninhydrin / Q000737:chemistry; D010209:Paper
chemical_list: C413384:1,2-indanedione; C406982:1,8-diazafluoren-one; D001372:Aza Compounds; D002247:Carbon Isotopes; D007189:Indans; D007202:Indicators and Reagents; D007510:Isatin; D002482:Cellulose; D009555:Ninhydrin; D000409:Alanine
keywords: DFO; Indanedione–zinc; Latent fingermark; NMR; Ninhydrin; Paper