Nuclear quadrupole resonance of methamphetamine hydrochloride

Junichiro Shinohara; Hideo Sato-Akaba; Hideo Itozaki

doi:10.1016/j.ssnmr.2012.02.003

Nuclear quadrupole resonance of methamphetamine hydrochloride

Solid State Nucl Magn Reson. 2012 May-Jun:43-44:27-31. doi: 10.1016/j.ssnmr.2012.02.003. Epub 2012 Feb 9.

Authors

Junichiro Shinohara¹, Hideo Sato-Akaba, Hideo Itozaki

Affiliation

¹ Graduate school of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan. sinohara@sup.ee.es.osaka-u.ac.jp

PMID: 22342373
DOI: 10.1016/j.ssnmr.2012.02.003

Abstract

The pulsed nuclear quadrupole resonance method was used to search for the NQR frequencies of (14)N in methamphetamine hydrochloride based on quantum chemical estimates. The NQR spectrum peaks were observed at ν(+)=1.217 MHz and ν(-)=0.654 MHz. The temperature dependences of the NQR frequencies and relaxation properties were investigated for the purpose of stand-off sensing of illicit drugs. The NQR frequency shifts for ν(+) and ν(-) were approximately 0.22 kHz/K and 0.10 kHz/K, respectively, around room temperature. The spin-lattice relaxation times and spin-phase memory times were 8.3 ms-10.0 ms and 0.65 ms -0.86 ms, respectively.