Four novel alkyl 2-cyanoacylate monomers and their use in latent fingermark detection by mid-infrared spectral imaging

Tahtouh, M; Scott, SA; Kalman, JR; Reedy, BJ

Four novel alkyl 2-cyanoacylate monomers and their use in latent fingermark detection by mid-infrared spectral imaging

Tahtouh, M Scott, SA Kalman, JR Reedy, BJ

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Publication Type:: Journal Article
Citation:: Forensic Science International, 2011, 207 (1-3), pp. 223 - 238
Issue Date:: 2011-04-15

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Field	Value	Language
dc.contributor.author	Tahtouh, M	en_US
dc.contributor.author	Scott, SA	en_US
dc.contributor.author	Kalman, JR	en_US
dc.contributor.author	Reedy, BJ https://orcid.org/0000-0003-1797-8091	en_US
dc.date.available	2010-10-09	en_US
dc.date.issued	2011-04-15	en_US
dc.identifier.citation	Forensic Science International, 2011, 207 (1-3), pp. 223 - 238	en_US
dc.identifier.issn	0379-0738	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14951
dc.description.abstract	Four novel alkyl 2-cyanoacrylate monomers (alkyl = 1-cyanoethyl, 2-cyanoethyl, trideuteromethyl and pentadeuteroethyl) have been tested for their ability to develop latent fingermarks that can then be visualized using mid-infrared spectral (chemical) imaging. Each of the four monomers was chosen for its potential to produce a strong, isolated infrared spectral band in its corresponding polymer (to provide spectral contrast against most backgrounds), as well as for its potential ability to be fumed onto fingermarks in the manner of conventional ethyl 2-cyanoacrylate (superglue). With the exception of the 2-cyanoethyl 2-cyanoacrylate, which had to be fumed under reduced pressure, all of the monomers were found to be sufficiently volatile to be fumed in a conventional fuming cabinet. All four monomers polymerized selectively on fingermark ridges on a variety of non-porous and semi-porous surfaces, leading to excellent development of the fingermarks. Unfortunately, although high quality mid-infrared spectral images of the fingermarks could be formed for all of the polymers at various frequencies, the new C. N or C. D stretching vibrations did not give rise to strong enough absorption intensities for good contrast on difficult backgrounds such as polymer banknotes. However, in the 1-cyanoethyl 2-cyanoacrylate polymer, the presence of the additional nitrile group had the unintended but desirable effect of shifting the strong C. O absorption to higher frequencies, moving it away from interfering banknote absorptions. This enabled fingermark contrast to be achieved even against the intaglio printing on the banknotes. © 2010 Elsevier Ireland Ltd.	en_US
dc.relation.ispartof	Forensic Science International	en_US
dc.relation.isbasedon	10.1016/j.forsciint.2010.10.012	en_US
dc.subject.classification	Legal & Forensic Medicine	en_US
dc.subject.mesh	Humans	en_US
dc.subject.mesh	Cyanoacrylates	en_US
dc.subject.mesh	Spectrophotometry, Infrared	en_US
dc.subject.mesh	Spectrum Analysis, Raman	en_US
dc.subject.mesh	Dermatoglyphics	en_US
dc.subject.mesh	Surface Properties	en_US
dc.subject.mesh	Volatilization	en_US
dc.subject.mesh	Porosity	en_US
dc.title	Four novel alkyl 2-cyanoacylate monomers and their use in latent fingermark detection by mid-infrared spectral imaging	en_US
dc.type	Journal Article
utslib.citation.volume	1-3	en_US
utslib.citation.volume	207	en_US
utslib.for	0699 Other Biological Sciences	en_US
dc.location.activity	WOS:000288851300059	en_US
dc.location.activity	Mesa, Arizona, USA
dc.location.activity	Ireland
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 Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	1-3	en_US
pubs.publication-status	Published	en_US
pubs.volume	207	en_US

Abstract:

Four novel alkyl 2-cyanoacrylate monomers (alkyl = 1-cyanoethyl, 2-cyanoethyl, trideuteromethyl and pentadeuteroethyl) have been tested for their ability to develop latent fingermarks that can then be visualized using mid-infrared spectral (chemical) imaging. Each of the four monomers was chosen for its potential to produce a strong, isolated infrared spectral band in its corresponding polymer (to provide spectral contrast against most backgrounds), as well as for its potential ability to be fumed onto fingermarks in the manner of conventional ethyl 2-cyanoacrylate (superglue). With the exception of the 2-cyanoethyl 2-cyanoacrylate, which had to be fumed under reduced pressure, all of the monomers were found to be sufficiently volatile to be fumed in a conventional fuming cabinet. All four monomers polymerized selectively on fingermark ridges on a variety of non-porous and semi-porous surfaces, leading to excellent development of the fingermarks. Unfortunately, although high quality mid-infrared spectral images of the fingermarks could be formed for all of the polymers at various frequencies, the new C. N or C. D stretching vibrations did not give rise to strong enough absorption intensities for good contrast on difficult backgrounds such as polymer banknotes. However, in the 1-cyanoethyl 2-cyanoacrylate polymer, the presence of the additional nitrile group had the unintended but desirable effect of shifting the strong C. O absorption to higher frequencies, moving it away from interfering banknote absorptions. This enabled fingermark contrast to be achieved even against the intaglio printing on the banknotes. © 2010 Elsevier Ireland Ltd.

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