651
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Wang Y, Morawska PO, Kanibolotsky AL, Skabara PJ, Turnbull GA, Samuel IDW. LED pumped polymer laser sensor for explosives. LASER & PHOTONICS REVIEWS 2013; 7:L71-L76. [PMID: 25821526 PMCID: PMC4374702 DOI: 10.1002/lpor.201300072] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 08/26/2013] [Accepted: 09/09/2013] [Indexed: 05/31/2023]
Abstract
A very compact explosive vapor sensor is demonstrated based on a distributed feedback polymer laser pumped by a commercial InGaN light-emitting diode. The laser shows a two-stage turn on of the laser emission, for pulsed drive currents above 15.7 A. The 'double-threshold' phenomenon is attributed to the slow rise of the ∼30 ns duration LED pump pulses. The laser emits a 533 nm pulsed output beam of ∼10 ns duration perpendicular to the polymer film. When exposed to nitroaromatic model explosive vapors at ∼8 ppb concentration, the laser shows a 46% change in the surface-emitted output under optimized LED excitation.
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Affiliation(s)
- Yue Wang
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St AndrewsNorth Haugh, St Andrews, KY16 9SS, UK
| | - Paulina O Morawska
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St AndrewsNorth Haugh, St Andrews, KY16 9SS, UK
| | - Alexander L Kanibolotsky
- WestCHEM, Department of Pure and Applied Chemistry, University of StrathclydeThomas Graham Building, Glasgow, G1 1XL, UK
| | - Peter J Skabara
- WestCHEM, Department of Pure and Applied Chemistry, University of StrathclydeThomas Graham Building, Glasgow, G1 1XL, UK
| | - Graham A Turnbull
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St AndrewsNorth Haugh, St Andrews, KY16 9SS, UK
| | - Ifor D W Samuel
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St AndrewsNorth Haugh, St Andrews, KY16 9SS, UK
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652
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An electronic tongue designed to detect ammonium nitrate in aqueous solutions. SENSORS 2013; 13:14064-78. [PMID: 24145916 PMCID: PMC3859109 DOI: 10.3390/s131014064] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/02/2013] [Accepted: 10/15/2013] [Indexed: 12/05/2022]
Abstract
An electronic tongue has been developed to monitor the presence of ammonium nitrate in water. It is based on pulse voltammetry and consists of an array of eight working electrodes (Au; Pt; Rh; Ir; Cu; Co; Ag and Ni) encapsulated in a stainless steel cylinder. In a first step the electrochemical response of the different electrodes was studied in the presence of ammonium nitrate in water in order to further design the wave form used in the voltammetric tongue. The response of the electronic tongue was then tested in the presence of a set of 15 common inorganic salts; i.e.; NH4NO3; MgSO4; NH4Cl; NaCl; Na2CO3; (NH4)2SO4; MgCl2; Na3PO4; K2SO4; K2CO3; CaCl2; NaH2PO4; KCl; NaNO3; K2HPO4. A PCA plot showed a fairly good discrimination between ammonium nitrate and the remaining salts studied. In addition Fuzzy Art map analyses determined that the best classification was obtained using the Pt; Co; Cu and Ni electrodes. Moreover; PLS regression allowed the creation of a model to correlate the voltammetric response of the electrodes with concentrations of ammonium nitrate in the presence of potential interferents such as ammonium chloride and sodium nitrate.
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653
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Barata PD, Prata JV. Cooperative Effects in the Detection of a Nitroaliphatic Liquid Explosive and an Explosive Taggant in the Vapor Phase by Calix[4]arene-Based Carbazole-Containing Conjugated Polymers. Chempluschem 2013; 79:83-89. [PMID: 31986770 DOI: 10.1002/cplu.201300280] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Indexed: 11/11/2022]
Abstract
Two fluorescent molecular receptor based conjugated polymers were used in the detection of a nitroaliphatic liquid explosive (nitromethane) and an explosive taggant (2,3-dimethyl-2,3-dinitrobutane) in the vapor phase. Results have shown that thin films of both polymers display remarkably high sensitivity and selectivity toward these analytes. Very fast, reproducible, and reversible responses were found. The unique behavior of these supramolecular host systems is ascribed to cooperativity effects developed between the calix[4]arene hosts and the phenylene ethynylene-carbazolylene main chains. The calix[4]arene hosts create a plethora of host-guest binding sites along the polymer backbone, either in their bowl-shaped cavities or between the outer walls of the cavity, to direct guests to the area of the transduction centers (main chain) at which favorable photoinduced electron transfer to the guest molecules occurs and leads to the observed fluorescence quenching. The high tridimensional porous nature of the polymers imparted by the bis-calixarene moieties concomitantly allows fast diffusion of guest molecules into the polymer thin films.
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Affiliation(s)
- Patrícia D Barata
- Laboratório de Química Orgânica, Departamento de Engenharia Química and Centro de Investigação de Engenharia, Química e Biotecnologia, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro, 1959-007 Lisboa (Portugal)
| | - José V Prata
- Laboratório de Química Orgânica, Departamento de Engenharia Química and Centro de Investigação de Engenharia, Química e Biotecnologia, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro, 1959-007 Lisboa (Portugal)
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654
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Liu K, Liu T, Chen X, Sun X, Fang Y. Fluorescent films based on molecular-gel networks and their sensing performances. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9830-9836. [PMID: 24028543 DOI: 10.1021/am4030774] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A pyrene-capped terthiophene of cholesteryl derivative (CholG-3T-Py) was designed, synthesized, and utilized for the fabrication of a fluorescent film. Unlike the commonly adopted direct-coating method, the film was fabricated by the physical immobilization of the fluorophore, CholG-3T-Py, onto a glass plate surface via preformed low-molecular-mass gelator (LMMGs)-based molecular-gel networks. The photophysical behavior of the film as prepared and its sensing performances to nitrobenzene (NB) were conducted after activation with toluene. It was found that the film as prepared and activated is sensitive to the presence of NB, and the sensing process is fully reversible. Furthermore, the effects of commonly found interferents, including structural analogues, raw materials, which are commonly used for the production of NB, and other nitroaromatics (NACs), on the sensing process were also tested. It was shown that only aniline and phenol possess slight interference. The present work not only extends the applications of LMMGs-based molecular gels but also provids a new approach for preparation of micro- and nano-structure-based fluorescent sensing films.
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Affiliation(s)
- Ke Liu
- Key Laboratory of Applied Surface and Colloid Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
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655
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Farahat Khedr MS, McNeil K, Nikles DE. Explosives detection with electron-rich polymers. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Medhat S. Farahat Khedr
- Center for Materials for Information Technology; The University of Alabama; Tuscaloosa Alabama 35487-0209 USA
| | - Keith McNeil
- Center for Materials for Information Technology; The University of Alabama; Tuscaloosa Alabama 35487-0209 USA
| | - David E. Nikles
- Center for Materials for Information Technology; The University of Alabama; Tuscaloosa Alabama 35487-0209 USA
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656
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A functional conjugated hyperbranched polymer derived from tetraphenylethene and oxadiazole moieties: Synthesis by one-pot “a4+b2+c2” polymerization and applicaion as explosive chemosensor and pled. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1328-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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657
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Tsiminis G, Chu F, Warren-Smith SC, Spooner NA, Monro TM. Identification and quantification of explosives in nanolitre solution volumes by Raman spectroscopy in suspended core optical fibers. SENSORS 2013; 13:13163-77. [PMID: 24084111 PMCID: PMC3859056 DOI: 10.3390/s131013163] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/18/2013] [Accepted: 09/24/2013] [Indexed: 11/16/2022]
Abstract
A novel approach for identifying explosive species is reported, using Raman spectroscopy in suspended core optical fibers. Numerical simulations are presented that predict the strength of the observed signal as a function of fiber geometry, with the calculated trends verified experimentally and used to optimize the sensors. This technique is used to identify hydrogen peroxide in water solutions at volumes less than 60 nL and to quantify microgram amounts of material using the solvent's Raman signature as an internal calibration standard. The same system, without further modifications, is also used to detect 1,4-dinitrobenzene, a model molecule for nitrobenzene-based explosives such as 2,4,6-trinitrotoluene (TNT).
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Affiliation(s)
- Georgios Tsiminis
- Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, the University of Adelaide, Adelaide, South Australia 5005, Australia; E-Mails: (S.C.W.-S.); (N.A.S.); (T.M.M.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +61-8-8313-2330; Fax: +61-8-8303-4380
| | - Fenghong Chu
- School of Computer Science and Information Technology, Shanghai University of Electric Power, Shanghai 200090, China; E-Mail:
| | - Stephen C. Warren-Smith
- Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, the University of Adelaide, Adelaide, South Australia 5005, Australia; E-Mails: (S.C.W.-S.); (N.A.S.); (T.M.M.)
| | - Nigel A. Spooner
- Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, the University of Adelaide, Adelaide, South Australia 5005, Australia; E-Mails: (S.C.W.-S.); (N.A.S.); (T.M.M.)
- Defence Science & Technology Organisation, South Australia 5111, Australia
| | - Tanya M. Monro
- Institute for Photonics & Advanced Sensing and School of Chemistry & Physics, the University of Adelaide, Adelaide, South Australia 5005, Australia; E-Mails: (S.C.W.-S.); (N.A.S.); (T.M.M.)
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658
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Shenashen MA, El-Safty SA, Elshehy EA. Architecture of optical sensor for recognition of multiple toxic metal ions from water. JOURNAL OF HAZARDOUS MATERIALS 2013; 260:833-843. [PMID: 23856314 DOI: 10.1016/j.jhazmat.2013.06.025] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 05/16/2013] [Accepted: 06/10/2013] [Indexed: 06/02/2023]
Abstract
Here, we designed novel optical sensor based on the wormhole hexagonal mesoporous core/multi-shell silica nanoparticles that enabled the selective recognition and removal of these extremely toxic metals from drinking water. The surface-coating process of a mesoporous core/double-shell silica platforms by several consequence decorations using a cationic surfactant with double alkyl tails (CS-DAT) and then a synthesized dicarboxylate 1,5-diphenyl-3-thiocarbazone (III) signaling probe enabled us to create a unique hierarchical multi-shell sensor. In this design, the high loading capacity and wrapping of the CS-DAT and III organic moieties could be achieved, leading to the formation of silica core with multi-shells that formed from double-silica, CS-DAT, and III dressing layers. In this sensing system, notable changes in color and reflectance intensity of the multi-shelled sensor for Cu(2+), Co(2+), Cd(2+), and Hg(2+) ions, were observed at pH 2, 8, 9.5 and 11.5, respectively. The multi-shelled sensor is added to enable accessibility for continuous monitoring of several different toxic metal ions and efficient multi-ion sensing and removal capabilities with respect to reversibility, selectivity, and signal stability.
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Affiliation(s)
- M A Shenashen
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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659
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Dey N, Samanta SK, Bhattacharya S. Selective and efficient detection of nitro-aromatic explosives in multiple media including water, micelles, organogel, and solid support. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8394-400. [PMID: 23992437 DOI: 10.1021/am401608q] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Selective detection of nitro-aromatic compounds (NACs) at nanomolar concentration is achieved for the first time in multiple media including water, micelles or in organogels as well as using test strips. Mechanism of interaction of NACs with highly fluorescent p-phenylenevinylene-based molecules has been described as the electron transfer phenomenon from the electron-rich chromophoric probe to the electron deficient NACs. The selectivity in sensing is guided by the pKa of the probes as well as the NACs under consideration. TNP-induced selective gel-to-sol transition in THF medium is also observed through the reorganization of molecular self-assembly and the portable test trips are made successfully for rapid on-site detection purpose.
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Affiliation(s)
- Nilanjan Dey
- Department of Organic Chemistry, Indian Institute of Science , Bangalore 560012, India
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660
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Khairy M, El-Safty SA, Shenashen MA, Elshehy EA. Hierarchical inorganic-organic multi-shell nanospheres for intervention and treatment of lead-contaminated blood. NANOSCALE 2013; 5:7920-7927. [PMID: 23851402 DOI: 10.1039/c3nr02403b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The highly toxic properties, bioavailability, and adverse effects of Pb(2+) species on the environment and living organisms necessitate periodic monitoring and removal whenever possible of Pb(2+) concentrations in the environment. In this study, we designed a novel optical multi-shell nanosphere sensor that enables selective recognition, unrestrained accessibility, continuous monitoring, and efficient removal (on the order of minutes) of Pb(2+) ions from water and human blood, i.e., red blood cells (RBCs). The consequent decoration of the mesoporous core/double-shell silica nanospheres through a chemically responsive azo-chromophore with a long hydrophobic tail enabled us to create a unique hierarchical multi-shell sensor. We examined the efficiency of the multi-shell sensor in removing lead ions from the blood to ascertain the potential use of the sensor in medical applications. The lead-induced hemolysis of RBCs in the sensing/capture assay was inhibited by the ability of the hierarchical sensor to remove lead ions from blood. The results suggest the higher flux and diffusion of Pb(2+) ions into the mesopores of the core/multi-shell sensor than into the RBC membranes. These findings indicate that the sensor could be used in the prevention of health risks associated with elevated blood lead levels such as anemia.
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Affiliation(s)
- Mohamed Khairy
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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661
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Prakash K, Nagarajan R. Synthesis of solid state fluorescent quino[2,3-b]carbazoles via copper(II) triflate-catalyzed heteroannulation: application to detection of TNT. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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662
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Niu Q, Gao K, Lin Z, Wu W. Surface molecular-imprinting engineering of novel cellulose nanofibril/conjugated polymer film sensors towards highly selective recognition and responsiveness of nitroaromatic vapors. Chem Commun (Camb) 2013; 49:9137-9. [PMID: 23986180 DOI: 10.1039/c3cc44705g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We designed and synthesized two conjugated polymer-grafted cellulose nanofibril film sensors via surface molecular-imprinting. These two surface TNT- or DNT-imprinted film sensors exhibit highly selective recognition and fast response towards target explosive vapor.
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Affiliation(s)
- Qingyuan Niu
- School of Materials science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
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663
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Huynh TP, Sosnowska M, Sobczak JW, KC CB, Nesterov VN, D’Souza F, Kutner W. Simultaneous Chronoamperometry and Piezoelectric Microgravimetry Determination of Nitroaromatic Explosives Using Molecularly Imprinted Thiophene Polymers. Anal Chem 2013; 85:8361-8. [DOI: 10.1021/ac4017677] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tan-Phat Huynh
- Department of Physical Chemistry
of Supramolecular Complexes, Institute of Physical Chemistry, Polish Academy of Sciences (IPC PAS), Kasprzaka 44/52,
01-224 Warsaw, Poland
- Department
of Chemistry, University of North Texas, 1155 Union Circle No. 305070,
Denton, Texas 76203-5017, United States
| | - Marta Sosnowska
- Department of Physical Chemistry
of Supramolecular Complexes, Institute of Physical Chemistry, Polish Academy of Sciences (IPC PAS), Kasprzaka 44/52,
01-224 Warsaw, Poland
- Department
of Chemistry, University of North Texas, 1155 Union Circle No. 305070,
Denton, Texas 76203-5017, United States
| | - Janusz W. Sobczak
- Department of Physical Chemistry
of Supramolecular Complexes, Institute of Physical Chemistry, Polish Academy of Sciences (IPC PAS), Kasprzaka 44/52,
01-224 Warsaw, Poland
| | - Chandra B. KC
- Department
of Chemistry, University of North Texas, 1155 Union Circle No. 305070,
Denton, Texas 76203-5017, United States
| | - Vladimir N. Nesterov
- Department
of Chemistry, University of North Texas, 1155 Union Circle No. 305070,
Denton, Texas 76203-5017, United States
| | - Francis D’Souza
- Department
of Chemistry, University of North Texas, 1155 Union Circle No. 305070,
Denton, Texas 76203-5017, United States
| | - Wlodzimierz Kutner
- Department of Physical Chemistry
of Supramolecular Complexes, Institute of Physical Chemistry, Polish Academy of Sciences (IPC PAS), Kasprzaka 44/52,
01-224 Warsaw, Poland
- Faculty of Mathematics and Natural
Sciences, School of Science, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3, 01-815
Warsaw, Poland
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664
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Wang L, Wang D, Lu H, Wang H, Xue L, Feng S. New cyano functionalized silanes: aggregation-induced emission enhancement properties and detection of 2,4,6-trinitrotoluene. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.3025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Linlin Wang
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Dengxu Wang
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Haifeng Lu
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Hua Wang
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Lei Xue
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
| | - Shengyu Feng
- Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 People's Republic of China
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665
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Zhu W, Li W, Yang H, Jiang Y, Wang C, Chen Y, Li G. A Rapid and Efficient Way to Dynamic Creation of Cross-Reactive Sensor Arrays Based on Ionic Liquids. Chemistry 2013; 19:11603-12. [DOI: 10.1002/chem.201300789] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Indexed: 11/05/2022]
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666
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Zhou XH, Li L, Li HH, Li A, Yang T, Huang W. A flexible Eu(III)-based metal-organic framework: turn-off luminescent sensor for the detection of Fe(III) and picric acid. Dalton Trans 2013; 42:12403-9. [PMID: 23860940 DOI: 10.1039/c3dt51081f] [Citation(s) in RCA: 241] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A metal-organic framework (MOF) {[Eu2(MFDA)2(HCOO)2(H2O)6]·H2O}n (1) (H2MFDA = 9,9-dimethylfluorene-2,7-dicarboxylic acid) has been solvothermally synthesized and structurally characterized. 1 possesses the three-dimensional pcu type rod-packing structure with one-dimensional rhombic channels. The framework of 1 can reversibly shrink/swell along the c axis upon partial/full release of the water molecules. Correspondingly, the rhombic channels become narrow/large and 1 transforms to narrow-pore 1a/large-pore 1b. 1, 1a and 1b have almost the same excitation and emission spectra with the strong characteristic red-light-emission of Eu(III). A high photoluminescence quantum yield of 77% and long luminescence lifetime of around 1.1 ms was observed for 1. The potential of 1b for Fe(3+) ions and PA sensing was studied in DMF through the luminescence quenching experiments, which show 1b is a potential turn-off luminescent sensory material for the selective detection of Fe(3+) ions and PA with detection limits of around 10(-7) M for both of them. The fluorescence quenching mechanism for Fe(3+) ions and PA was also investigated.
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Affiliation(s)
- Xin-Hui Zhou
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing, 210023, PR China.
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667
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Barata PD, Prata JV. New entities for sensory chemistry based on calix[4]arene-carbazole conjugates: from synthesis to applications. Supramol Chem 2013. [DOI: 10.1080/10610278.2013.804185] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Patrícia D. Barata
- Laboratório de Química Orgânica, Departamento de Engenharia Química and Centro de Investigação de Engenharia Química e Biotecnologia, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro, 1, 1959-007, Lisboa, Portugal
| | - José V. Prata
- Laboratório de Química Orgânica, Departamento de Engenharia Química and Centro de Investigação de Engenharia Química e Biotecnologia, Instituto Superior de Engenharia de Lisboa, Instituto Politécnico de Lisboa, R. Conselheiro Emídio Navarro, 1, 1959-007, Lisboa, Portugal
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668
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Rochat S, Swager TM. Conjugated amplifying polymers for optical sensing applications. ACS APPLIED MATERIALS & INTERFACES 2013; 5:4488-502. [PMID: 23682919 DOI: 10.1021/am400939w] [Citation(s) in RCA: 250] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Thanks to their unique optical and electrochemical properties, conjugated polymers have attracted considerable attention over the last two decades and resulted in numerous technological innovations. In particular, their implementation in sensing schemes and devices was widely investigated and produced a multitude of sensory systems and transduction mechanisms. Conjugated polymers possess numerous attractive features that make them particularly suitable for a broad variety of sensing tasks. They display sensory signal amplification (compared to their small-molecule counterparts) and their structures can easily be tailored to adjust solubility, absorption/emission wavelengths, energy offsets for excited state electron transfer, and/or for use in solution or in the solid state. This versatility has made conjugated polymers a fluorescence sensory platform of choice in the recent years. In this review, we highlight a variety of conjugated polymer-based sensory mechanisms together with selected examples from the recent literature.
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Affiliation(s)
- Sébastien Rochat
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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669
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El‐Safty SA, Abdellatef S, Ismael M, Shahat A. Optical nanosphere sensor based on shell-by-shell fabrication for removal of toxic metals from human blood. Adv Healthc Mater 2013; 2:854-62. [PMID: 23307510 DOI: 10.1002/adhm.201200326] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 11/26/2012] [Indexed: 11/10/2022]
Abstract
Because toxic heavy metals tend to bioaccumulate, they represent a substantial human health hazard. Various methods are used to identify and quantify toxic metals in biological tissues and environment fluids, but a simple, rapid, and inexpensive system has yet to be developed. To reduce the necessity for instrument-dependent analysis, we developed a single, pH-dependent, nanosphere (NS) sensor for naked-eye detection and removal of toxic metal ions from drinking water and physiological systems (i.e., blood). The design platform for the optical NS sensor is composed of double mesoporous core-shell silica NSs fabricated by one-pot, template-guided synthesis with anionic surfactant. The dense shell-by-shell NS construction generated a unique hierarchical NS sensor with a hollow cage interior to enable accessibility for continuous monitoring of several different toxic metal ions and efficient multi-ion sensing and removal capabilities with respect to reversibility, longevity, selectivity, and signal stability. Here, we examined the application of the NS sensor for the removal of toxic metals (e.g., lead ions from a physiological system, such as human blood). The findings show that this sensor design has potential for the rapid screening of blood lead levels so that the effects of lead toxicity can be avoided.
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Affiliation(s)
- S. A. El‐Safty
- National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047, Japan
- Graduate School for Advanced Science and Engineering, Waseda University, 3‐4‐1, Okubo, Shinjuku‐ku, Tokyo 169‐8555, Japan
| | - S. Abdellatef
- National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047, Japan
| | - M. Ismael
- National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047, Japan
| | - A. Shahat
- National Institute for Materials Science (NIMS), 1‐2‐1 Sengen, Tsukuba, Ibaraki 305‐0047, Japan
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670
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Sarkar K, Salinas Y, Campos I, Martínez-Máñez R, Marcos MD, Sancenón F, Amorós P. Organic-Inorganic Hybrid Mesoporous Materials as Regenerable Sensing Systems for the Recognition of Nitroaromatic Explosives. Chempluschem 2013; 78:684-694. [DOI: 10.1002/cplu.201300140] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Indexed: 12/31/2022]
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671
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Du J, Jiang L, Shao Q, Liu X, Marks RS, Ma J, Chen X. Colorimetric detection of mercury ions based on plasmonic nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:1467-1481. [PMID: 22961942 DOI: 10.1002/smll.201200811] [Citation(s) in RCA: 169] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Indexed: 06/01/2023]
Abstract
The development of rapid, specific, cost-effective, and robust tools in monitoring Hg(2+) levels in both environmental and biological samples is of utmost importance due to the severe mercury toxicity to humans. A number of techniques exist, but the colorimetric assay, which is reviewed herein, is shown to be a possible tool in monitoring the level of mercury. These assays allow transforming target sensing events into color changes, which have applicable potential for in-the-field application through naked-eye detection. Specifically, plasmonic nanoparticle-based colorimetric assay exhibits a much better propensity for identifying various targets in terms of sensitivity, solubility, and stability compared to commonly used organic chromophores. In this review, recent progress in the development of gold nanoparticle-based colorimetric assays for Hg(2+) is summarized, with a particular emphasis on examples of functionalized gold nanoparticle systems with oligonucleotides, oligopeptides, and functional molecules. Besides highlighting the current design principle for plasmonic nanoparticle-based colorimetric probes, the discussions on challenges and the prospect of next-generation probes for in-the-field applications are also presented.
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Affiliation(s)
- Jianjun Du
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
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672
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Wang Z, Chen S, Lam JWY, Qin W, Kwok RTK, Xie N, Hu Q, Tang BZ. Long-Term Fluorescent Cellular Tracing by the Aggregates of AIE Bioconjugates. J Am Chem Soc 2013; 135:8238-45. [DOI: 10.1021/ja312581r] [Citation(s) in RCA: 329] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhengke Wang
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
- Institute of Biomedical Macromolecules,
MoE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
- HKUST Shenzhen Research Institute, Nanshan, Shenzhen 518057, China
| | - Sijie Chen
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
- HKUST Shenzhen Research Institute, Nanshan, Shenzhen 518057, China
| | - Jacky W. Y. Lam
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
- HKUST Shenzhen Research Institute, Nanshan, Shenzhen 518057, China
| | - Wei Qin
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
| | - Ryan T. K. Kwok
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
| | - Ni Xie
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
| | - Qiaoling Hu
- Institute of Biomedical Macromolecules,
MoE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou 310027, China
| | - Ben Zhong Tang
- Department of Chemistry, Division
of Biomedical Engineering, Institute for Advanced Study, and Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay,
Kowloon, Hong Kong, China
- Guangdong Innovative Research
Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of
Luminescent Materials and Devices, South China University of Technology (SCUT), Guangzhou 510640, China
- HKUST Shenzhen Research Institute, Nanshan, Shenzhen 518057, China
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673
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Abstract
A conjugated porous polymer (CPP) that exhibits fluorescence quenching when exposed to TNT vapor was synthesized via a Sonaogashira cross-coupling reaction. Two polymerization solvents, DMF and PhMe, and two activation procedures, evacuation and lyophilization, were evaluated to optimize the response of the CPP to TNT vapor. Key differences in surface area and absorption were seen as a function of polymerization solvent and activation procedure. The polymer synthesized in DMF and activated by lyophilization had the highest surface area and the strongest response to TNT vapor. This paper demonstrates the importance of growth and activation conditions in optimizing the porosity and sensing performance of CPPs.
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Affiliation(s)
- Jennifer L. Novotney
- Baker Laboratory, Department of Chemistry
and Chemical Biology, Cornell University, Ithaca, New York, 14853-1301, United States
| | - William R. Dichtel
- Baker Laboratory, Department of Chemistry
and Chemical Biology, Cornell University, Ithaca, New York, 14853-1301, United States
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674
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Li H, Wu H, Zhao E, Li J, Sun JZ, Qin A, Tang BZ. Hyperbranched Poly(aroxycarbonyltriazole)s: Metal-Free Click Polymerization, Light Refraction, Aggregation-Induced Emission, Explosive Detection, and Fluorescent Patterning. Macromolecules 2013. [DOI: 10.1021/ma400609m] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hongkun Li
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou
310027, China
| | - Haiqiang Wu
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou
310027, China
| | - Engui Zhao
- Department of Chemistry, Institute for Advanced Study, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jie Li
- Department of Chemistry, Institute for Advanced Study, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Jing Zhi Sun
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou
310027, China
| | - Anjun Qin
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou
310027, China
| | - Ben Zhong Tang
- MOE Key Laboratory of Macromolecular
Synthesis and Functionalization, Department of Polymer Science and
Engineering, Zhejiang University, Hangzhou
310027, China
- Department of Chemistry, Institute for Advanced Study, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- Guangdong Innovative Research
Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640,
China
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675
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Detection of Nitroaromatic and Peroxide Explosives in Air Using Infrared Spectroscopy: QCL and FTIR. ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/532670] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A methodology for processing spectroscopic information using a chemometrics-based analysis was designed and implemented in the detection of highly energetic materials (HEMs) in the gas phase at trace levels. The presence of the nitroaromatic HEM 2,4-dinitrotoluene (2,4-DNT) and the cyclic organic peroxide triacetone triperoxide (TATP) in air was detected by chemometrics-enhanced vibrational spectroscopy. Several infrared experimental setups were tested using traditional heated sources (globar), modulated and nonmodulated FT-IR, and quantum cascade laser- (QCL-) based dispersive IR spectroscopy. The data obtained from the gas phase absorption experiments in the midinfrared (MIR) region were used for building the chemometrics models. Partial least-squares discriminant analysis (PLS-DA) was used to generate pattern recognition schemes for trace amounts of explosives in air. The QCL-based methodology exhibited a better capacity of discrimination for the detected presence of HEM in air compared to other methodologies.
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676
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Fast and sensitive recognition of various explosive compounds using Raman spectroscopy and principal component analysis. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.01.079] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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677
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Yu Y, Cao Q, Zhou M, Cui H. A novel homogeneous label-free aptasensor for 2,4,6-trinitrotoluene detection based on an assembly strategy of electrochemiluminescent graphene oxide with gold nanoparticles and aptamer. Biosens Bioelectron 2013; 43:137-42. [DOI: 10.1016/j.bios.2012.12.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 11/23/2012] [Accepted: 12/09/2012] [Indexed: 11/30/2022]
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678
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A Polytriazole Synthesized by 1,3-Dipolar Polycycloaddition Showing Aggregation-Enhanced Emission and Utility in Explosive Detection. Macromol Rapid Commun 2013; 34:796-802. [DOI: 10.1002/marc.201200838] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 02/18/2013] [Indexed: 12/12/2022]
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679
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Dong M, Wang YW, Zhang AJ, Peng Y. Colorimetric and Fluorescent Chemosensors for the Detection of 2,4,6-Trinitrophenol and Investigation of their Co-Crystal Structures. Chem Asian J 2013; 8:1321-30. [DOI: 10.1002/asia.201300159] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 12/26/2022]
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680
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Salinas Y, Martínez-Máñez R, Jeppesen JO, Petersen LH, Sancenón F, Marcos MD, Soto J, Guillem C, Amorós P. Tetrathiafulvalene-capped hybrid materials for the optical detection of explosives. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1538-1543. [PMID: 23373746 DOI: 10.1021/am303111c] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Mesoporous silica microparticles capped with TTF moieties and containing a ruthenium dye in the pores were used for the turn-on optical detection of the nitroaromatic explosives Tetryl and TNT via a selective pore uncapping and release of the entrapped dye.
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Affiliation(s)
- Yolanda Salinas
- Instituto de Reconocimiento Molecular y Desarrollo Tecnológico, Centro Mixto Universidad Politécnica de Valencia - Universitat de Valencia, E-46022, Valencia, Spain
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681
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Multifunctionalized porosity in zeolitic diamondoid porous organic salt: selective adsorption and guest-responsive fluorescent properties. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.086] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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682
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Nagarkar SS, Joarder B, Chaudhari AK, Mukherjee S, Ghosh SK. Highly Selective Detection of Nitro Explosives by a Luminescent Metal-Organic Framework. Angew Chem Int Ed Engl 2013; 52:2881-5. [DOI: 10.1002/anie.201208885] [Citation(s) in RCA: 1098] [Impact Index Per Article: 99.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 12/17/2012] [Indexed: 11/09/2022]
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683
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Highly Selective Detection of Nitro Explosives by a Luminescent Metal-Organic Framework. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208885] [Citation(s) in RCA: 232] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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684
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Banerjee D, Hu Z, Pramanik S, Zhang X, Wang H, Li J. Vapor phase detection of nitroaromatic and nitroaliphatic explosives by fluorescence active metal–organic frameworks. CrystEngComm 2013. [DOI: 10.1039/c3ce41680a] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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685
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Xue P, Xu Q, Gong P, Qian C, Ren A, Zhang Y, Lu R. Fibrous film of a two-component organogel as a sensor to detect and discriminate organic amines. Chem Commun (Camb) 2013; 49:5838-40. [DOI: 10.1039/c3cc42892c] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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686
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687
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Zhou X, Li H, Xiao H, Li L, Zhao Q, Yang T, Zuo J, Huang W. A microporous luminescent europium metal–organic framework for nitro explosive sensing. Dalton Trans 2013; 42:5718-23. [DOI: 10.1039/c3dt00055a] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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688
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Zhu W, Li W, Wang C, Cui J, Yang H, Jiang Y, Li G. CB[8]-based rotaxane as a useful platform for sensitive detection and discrimination of explosives. Chem Sci 2013. [DOI: 10.1039/c3sc51132d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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689
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Xu B, Xu Y, Wang X, Li H, Wu X, Tong H, Wang L. Porous films based on a conjugated polymer gelator for fluorescent detection of explosive vapors. Polym Chem 2013. [DOI: 10.1039/c3py00806a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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690
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Demirel GB, Daglar B, Bayindir M. Extremely fast and highly selective detection of nitroaromatic explosive vapours using fluorescent polymer thin films. Chem Commun (Camb) 2013; 49:6140-2. [DOI: 10.1039/c3cc43202e] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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691
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Xie H, Zeng F, Yu C, Wu S. A polylysine-based fluorescent probe for sulfite anion detection in aqueous media via analyte-induced charge generation and complexation. Polym Chem 2013. [DOI: 10.1039/c3py00586k] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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692
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Gong YN, Jiang L, Lu TB. A highly stable dynamic fluorescent metal–organic framework for selective sensing of nitroaromatic explosives. Chem Commun (Camb) 2013; 49:11113-5. [DOI: 10.1039/c3cc46530f] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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693
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Shanmugaraju S, Jadhav H, Karthik R, Mukherjee PS. Electron rich supramolecular polymers as fluorescent sensors for nitroaromatics. RSC Adv 2013. [DOI: 10.1039/c3ra23269g] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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694
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695
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Kasera S, Biedermann F, Baumberg JJ, Scherman OA, Mahajan S. Quantitative SERS using the sequestration of small molecules inside precise plasmonic nanoconstructs. NANO LETTERS 2012; 12:5924-8. [PMID: 23088754 DOI: 10.1021/nl303345z] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We show how the macrocyclic host, cucurbit[8]uril (CB[8]), creates precise subnanometer junctions between gold nanoparticles while its cavity simultaneously traps small molecules; this enables their reproducible surface-enhanced Raman spectroscopy (SERS) detection. Explicit shifts in the SERS frequencies of CB[8] on complexation with guest molecules provides a direct strategy for absolute quantification of a range of molecules down to 10(-11) M levels. This provides a new analytical paradigm for quantitative SERS of small molecules.
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Affiliation(s)
- Setu Kasera
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, United Kingdom
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696
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Venkatramaiah N, Kumar S, Patil S. Femtogram Detection of Explosive Nitroaromatics: Fluoranthene-Based Fluorescent Chemosensors. Chemistry 2012; 18:14745-51. [DOI: 10.1002/chem.201201764] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Indexed: 11/08/2022]
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697
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Ma Y, Li H, Peng S, Wang L. Highly selective and sensitive fluorescent paper sensor for nitroaromatic explosive detection. Anal Chem 2012; 84:8415-21. [PMID: 22946839 DOI: 10.1021/ac302138c] [Citation(s) in RCA: 187] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Rapid, sensitive, and selective detection of explosives such as 2,4,6-trinitrotoluene (TNT) and 2,4,6-trinitrophenol (TNP), especially using a facile paper sensor, is in high demand for homeland security and public safety. Although many strategies have been successfully developed for the detection of TNT, it is not easy to differentiate the influence from TNP. Also, few methods were demonstrated for the selective detection of TNP. In this work, via a facile and versatile method, 8-hydroxyquinoline aluminum (Alq(3))-based bluish green fluorescent composite nanospheres were successfully synthesized through self-assembly under vigorous stirring and ultrasonic treatment. These polymer-coated nanocomposites are not only water-stable but also highly luminescent. Based on the dramatic and selective fluorescence quenching of the nanocomposites via adding TNP into the aqueous solution, a sensitive and robust platform was developed for visual detection of TNP in the mixture of nitroaromatics including TNT, 2,4-dinitrotoluene (DNT), and nitrobenzene (NB). Meanwhile, the fluorescence intensity is proportional to the concentration of TNP in the range of 0.05-7.0 μg/mL with the 3σ limit of detection of 32.3 ng/mL. By handwriting or finger printing with TNP solution as ink on the filter paper soaked with the fluorescent nanocomposites, the bluish green fluorescence was instantly and dramatically quenched and the dark patterns were left on the paper. Therefore, a convenient and rapid paper sensor for TNP-selective detection was fabricated.
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Affiliation(s)
- Yingxin Ma
- State Key Laboratory of Chemical Resource Engineering, School of Science, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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698
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Highly sensitive detection of nitroaromatic explosives using an electrospun nanofibrous sensor based on a novel fluorescent conjugated polymer. Anal Chim Acta 2012; 744:82-91. [DOI: 10.1016/j.aca.2012.07.028] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 07/16/2012] [Accepted: 07/18/2012] [Indexed: 11/18/2022]
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699
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Lin D, Liu H, Qian K, Zhou X, Yang L, Liu J. Ultrasensitive optical detection of trinitrotoluene by ethylenediamine-capped gold nanoparticles. Anal Chim Acta 2012; 744:92-8. [DOI: 10.1016/j.aca.2012.07.029] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Revised: 06/11/2012] [Accepted: 07/08/2012] [Indexed: 10/28/2022]
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700
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Wu W, Ye S, Tang R, Huang L, Li Q, Yu G, Liu Y, Qin J, Li Z. New tetraphenylethylene-containing conjugated polymers: Facile synthesis, aggregation-induced emission enhanced characteristics and application as explosive chemsensors and PLEDs. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.035] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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