Nuclear quadrupole resonance of methamphetamine hydrochloride

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• 作者：Junichiro Shinohara ; ^{sinohara@sup.ee.es.osaka-u.ac.jp} ; Hideo Sato-Akaba ; Hideo Itozaki
• 关键词：Nuclear quadrupole resonance ; Methamphetamine hydrochloride
• 刊名：Solid State Nuclear Magnetic Resonance
• 出版年：2012
• 期刊代码：83_09262040
• 类别：ce
• 出版时间：May-June, 2012
• 卷：43-44
• 期：Complete
• 页码：27-31
• 文件大小：319 K

摘要

The pulsed nuclear quadrupole resonance method was used to search for the NQR frequencies of ¹⁴N in methamphetamine hydrochloride based on quantum chemical estimates. The NQR spectrum peaks were observed at 谓₊=1.217 MHz and 谓_{鈭?/sub>=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 谓+ and 谓鈭?/sub> 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.}