Literature DB >> 25018772

Intermolecular Interactions between Eosin Y and Caffeine Using 1H-NMR Spectroscopy.

Macduff O Okuom1, Mark V Wilson1, Abby Jackson1, Andrea E Holmes1.   

Abstract

DETECHIP has been used in testing analytes including caffeine, cocaine, and tetrahydrocannabinol (THC) from marijuana, as well as date rape and club drugs such as flunitrazepam, gamma-hydroxybutyric acid (GHB), and methamphetamine. This study investigates the intermolecular interaction between DETECHIP sensor eosin Y (DC1) and the analyte (caffeine) that is responsible for the fluorescence and color changes observed in the actual array. Using 1H-NMR, 1H-COSY, and 1H-DOSY NMR methods, a proton exchange from C-8 of caffeine to eosin Y is proposed.

Entities:  

Year:  2013        PMID： 25018772      PMCID： PMC4091800          DOI： 10.1155/2013/245376

Source DB:  PubMed          Journal:  Int J Spectrosc        ISSN： 1687-9449


  14 in total

1.  Simultaneous analysis of flunitrazepam and its major metabolites in human plasma by high performance liquid chromatography tandem mass spectrometry.

Authors:  Manfred Kollroser; Caroline Schober
Journal:  J Pharm Biomed Anal       Date:  2002-06-15       Impact factor: 3.935

Review 2.  NMR spectroscopy in the structural elucidation of oligosaccharides and glycosides.

Authors:  P K Agrawal
Journal:  Phytochemistry       Date:  1992-10       Impact factor: 4.072

Review 3.  Doping in competition or doping in sport?

Authors:  Giuseppe Lippi; Massimo Franchini; Gian Cesare Guidi
Journal:  Br Med Bull       Date:  2008-04-01       Impact factor: 4.291

4.  DETECHIP: a sensor for drugs of abuse.

Authors:  Raychelle M Burks; Shari E Pacquette; Mike A Guericke; Mark V Wilson; David J Symonsbergen; Kerry A Lucas; Andrea E Holmes
Journal:  J Forensic Sci       Date:  2010-02-25       Impact factor: 1.832

5.  Identification of volatile chemical signatures from plastic explosives by SPME-GC/MS and detection by ion mobility spectrometry.

Authors:  Hanh Lai; Alfred Leung; Matthew Magee; José R Almirall
Journal:  Anal Bioanal Chem       Date:  2010-03-13       Impact factor: 4.142

6.  Protein encapsulation within synthetic molecular hosts.

Authors:  Daishi Fujita; Kosuke Suzuki; Sota Sato; Maho Yagi-Utsumi; Yoshiki Yamaguchi; Nobuhiro Mizuno; Takashi Kumasaka; Masaki Takata; Masanori Noda; Susumu Uchiyama; Koichi Kato; Makoto Fujita
Journal:  Nat Commun       Date:  2012       Impact factor: 14.919

7.  Deposition of 7-aminoflunitrazepam and flunitrazepam in hair after a single dose of Rohypnol.

Authors:  A Negrusz; C M Moore; K B Hinkel; T L Stockham; M Verma; M J Strong; P G Janicak
Journal:  J Forensic Sci       Date:  2001-09       Impact factor: 1.832

8.  pKa determinations of xanthene derivates in aqueous solutions by multivariate analysis applied to UV-Vis spectrophotometric data.

Authors:  Vagner Roberto Batistela; Diogo Silva Pellosi; Franciane Dutra de Souza; Willian Ferreira da Costa; Silvana Maria de Oliveira Santin; Vagner Roberto de Souza; Wilker Caetano; Hueder Paulo Moisés de Oliveira; Ieda Spacino Scarminio; Noboru Hioka
Journal:  Spectrochim Acta A Mol Biomol Spectrosc       Date:  2011-04-02       Impact factor: 4.098

Review 9.  Banned drugs in sport. Does the International Olympic Committee (IOC) list need updating?

Authors:  D R Mottram
Journal:  Sports Med       Date:  1999-01       Impact factor: 11.136

10.  Highly sensitive micro-plate enzyme immunoassay screening and NCI-GC-MS confirmation of flunitrazepam and its major metabolite 7-aminoflunitrazepam in hair.

Authors:  A Negrusz; C Moore; D Deitermann; D Lewis; K Kaleciak; R Kronstrand; B Feeley; R S Niedbala
Journal:  J Anal Toxicol       Date:  1999-10       Impact factor: 3.367
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