TY - JOUR
T1 - Highly responsive fluorescent sensing of explosives taggant with an organic nanofibril film
AU - Naddo, Tammene
AU - Yang, Xiaomei
AU - Moore, Jeffrey S.
AU - Zang, Ling
N1 - Funding Information:
This work was supported by NSF (CAREER CHE 0641353, CBET 730667 and CHE 0642413), ACS PRF (45732-G10). Tammene Naddo was born in Ethiopia in 1961. He completed his BS studies in Chemistry in 1982 at Addis Ababa University, Ethiopia. In 1985 he rejoined the same University and graduated with MS degree in Chemistry in 1987. Currently, Tammene is pursuing his Ph.D. under the supervision of Ling Zang at the Department of Chemistry and Biochemistry of Southern Illinois University at Carbondale. His major research interest centers on fluorescence sensory detection of explosives using organic nanofibril films. Xiaomei Yang was born in China in 1968. She received her BS in 1991 and Ph.D. in 1996, both in chemistry from Tsinghua University. She is currently working in the Department of Chemistry, Southern Illinois University, on the computational optimization of molecular structure and the intermolecular interaction and stacking. Jeffrey Moore was born near Joliet, IL in 1962. He received his BS in chemistry (1984) from the University of Illinois, and his Ph.D. in Materials Science and Engineering with Samuel Stupp (1989). After a NSF position at Caltech with Robert Grubbs, he began his independent career at the University of Michigan in Ann Arbor. He returned in 1993 to the University of Illinois, where he is currently the Murchison-Mallory Professor of Chemistry and Materials Science and Engineering. His research focuses on molecular self-assembly, structure-controlled macromolecules and foldamers, stimuli-responsive materials, and self-healing polymers. Ling Zang was born in China in 1968, where he received his B.S. in 1991 from Tsinghua University and his Ph.D. in 1995 from the Chinese Academy of Sciences. After about 2 years stay in Germany as an Alexander von Humboldt Fellow, he moved to the US in 1998 to continue his research, first at Bowling Green State University and then at Columbia University. In 2003, he joined the chemistry faculty at Southern Illinois University, where he was promoted to Associate Professor in 2008. In the fall of 2008, he will move to University of Utah to join the faculty of the Department of Materials Science and Engineering, where he will be a USTAR endowed associate professor. His current research interest centers on the manipulation of functional nanostructures, nanomaterials and molecular devices, and the characterization at single-molecule and nanometer scales.
PY - 2008/8/28
Y1 - 2008/8/28
N2 - Efficient sensing of an explosives taggant, 2,3-dimethyl-2,3-dinitrobutane (DMNB), has been performed with an organic nanofibril film through monitoring the fluorescence quenching of the film upon exposure to the DMNB vapor. The nanofibril film was fabricated from an alkoxycarbonyl-substituted carbazole-cornered conjugate tetracycle molecule, namely ACTC, which possesses a planar, rigid molecular geometry that favors cofacial π-π stacking between the molecules, leading to the formation of nanofibril structures with extended one-dimensional molecular stacking. The nanofibril film thus fabricated demonstrated unprecedented efficiency in detecting DMNB vapor, likely due to the extended one-dimensional molecular packing and the highly porous structure thus formed within the film. The former facilitates the exciton migration along the long-axis of nanofiber, while the latter enhances the adsorption of DMNB vapor and the expedient diffusion of the analyte through the film. The enhanced adsorption and diffusion of DMNB molecules within the matrix of the film also accounts for the improved response time of the film in fluorescence quenching upon exposure to DMNB vapor.
AB - Efficient sensing of an explosives taggant, 2,3-dimethyl-2,3-dinitrobutane (DMNB), has been performed with an organic nanofibril film through monitoring the fluorescence quenching of the film upon exposure to the DMNB vapor. The nanofibril film was fabricated from an alkoxycarbonyl-substituted carbazole-cornered conjugate tetracycle molecule, namely ACTC, which possesses a planar, rigid molecular geometry that favors cofacial π-π stacking between the molecules, leading to the formation of nanofibril structures with extended one-dimensional molecular stacking. The nanofibril film thus fabricated demonstrated unprecedented efficiency in detecting DMNB vapor, likely due to the extended one-dimensional molecular packing and the highly porous structure thus formed within the film. The former facilitates the exciton migration along the long-axis of nanofiber, while the latter enhances the adsorption of DMNB vapor and the expedient diffusion of the analyte through the film. The enhanced adsorption and diffusion of DMNB molecules within the matrix of the film also accounts for the improved response time of the film in fluorescence quenching upon exposure to DMNB vapor.
KW - Explosive
KW - Film
KW - Fluorescence quenching
KW - Nanofiber
KW - Sensing
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U2 - 10.1016/j.snb.2008.05.001
DO - 10.1016/j.snb.2008.05.001
M3 - Article
AN - SCOPUS:49549118011
SN - 0925-4005
VL - 134
SP - 287
EP - 291
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - 1
ER -