Several polymers have been used to detect nitroaromatic explosives by a variety of transduction schemes. Detection relies on both electronic and structural interactions between the sensing material analyte. Quenching luminescent electron deficient explosives, such as trinitrotoluene, may be monitored explosives. Resistive using carbon black particles that coated with different organic deposited across metallic leads can also vapors in an nose approach. Frequency changes surface acoustic wave...

The synthesis, spectroscopic characterization, and fluorescence quenching efficiency of polymers copolymers containing tetraphenylsilole or tetraphenylgermole with Si−Si, Ge−Ge, Si−Ge backbones are reported. Poly(tetraphenyl)germole, 2, was synthesized from the reduction dichloro(tetraphenyl)germole 2 equivs Li. Silole−germole alternating copolymer 3 by coupling dilithium salts dianion dichloro(tetraphenyl)germole. Other tetraphenylmetallole-silane copolymers, 4−12, were through Wurtz-type...

The syntheses, spectroscopic characterizations, and fluorescence quenching efficiencies of polymers copolymers containing tetraphenylsilole- or silafluorene-vinylene repeat units are reported. These materials were prepared by catalytic hydrosilylation reactions between appropriate monomeric metallole alkynes hydrides. Trimeric model compounds methyl(tetraphenyl)silole-vinylene trimer (1), methyl(tetraphenyl)silole-silafluorene-vinylene cotrimer (2), methylsilafluorene-vinylene (3)...

Colloidal suspensions of 3-aminopropylmethyl(tetraphenyl)silole nanoparticles can be used as selective chemosensors for carcinogenic chromium(VI) analyte. Methylhydrosilole is functionalized by hydrosilation allylamine, and the colloid prepared rapid addition water to a THF solution silole. The method detection through electron-transfer quenching fluorescence silole (lambda(em) = 485 nm at 360 excitation) analytes, with hundred parts per billion limits. Stern-Volmer plots are linear up 10...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTDetection of Fluorophosphonate Chemical Warfare Agents by Catalytic Hydrolysis with a Porous Silicon InterferometerHonglae Sohn, Sonia Létant, Michael J. Sailor, and William C. TroglerView Author Information Department Chemistry Biochemistry University California at San Diego 9500 Gilman Drive, 92093-0358 Cite this: Am. Chem. Soc. 2000, 122, 22, 5399–5400Publication Date (Web):May 20, 2000Publication History Received22 February 2000Revised18...

Nitrous oxide in the earth's atmosphere contributes to catalytic stratospheric ozone destruction and is also a greenhouse gas component. A precise budgetary accounting of N(2)O sources has remained elusive, there an apparent lack source identification. One as by-product manufacture nylon, specifically preparation adipic acid. Characterization reaction stoichiometry its isotopic composition with simulated industrial acid synthesis indicates that because high rates global production, this may...

Nitroaromatic explosives can be detected in a simple and rapid method by the quenching of photoluminescence fluorescent polysiloles. Quenching is achieved electron transfer from conduction band polysiloles to electron-poor molecules such as picric acid, nitrobenzene, 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT). Dilute polymer solutions also employed forensic spray-on reagent visualize TNT or acid residues under UV lamp (see picture print nitrile-gloved hand that had been contact with TNT).

The sensitivities of metallophthalocyanine (MPcs: M = Co, Ni, Cu, Zn, and H2) chemiresistors to vapor phase electron donors were examined using 50 nm MPc films deposited on interdigitated electrodes. Sensor responses measured as changes in current at constant voltage. Analytes chosen span a broad range Lewis base hydrogen bond strengths. sensor correlated exponentially with binding enthalpy. These exponential fits consistent the van't Hoff equation standard free energy relationships....

The gas sensing behaviors of cobalt phthalocyanine (CoPc) and metal-free (H2Pc) thin films were investigated with respect to analyte basicity. Chemiresistive sensors fabricated by deposition 50 nm thick on interdigitated gold electrodes via organic molecular beam epitaxy (OMBE). Time-dependent current responses the measured at constant voltage during exposure vapor doses. analytes spanned a range electron donor hydrogen-bonding strengths. It was found that, when exceeded critical base...

The synthesis and spectroscopic characterization of a series new blue-emitting silafluorene–fluorene copolymers is described. polymers are synthesized using kinetically controlled hydrosilylation copolymerization 1,1-dihydridosilafluorene with 9-substituted 2,7-diethynylfluorenes. contain trans-only framework molecular weights in the range 13 000–20 000, as determined by gel permeation chromatography (GPC) polystyrene standards, 1H NMR spectroscopy dimethylphenylsilane an end-capping marker...

Hollow silica nanospheres were prepared by template growth of gel on monodisperse (100−500 nm) polystyrene beads coated with poly-l-lysine, followed calcinations. A similar route was used to prepare titania nanospheres.

Silica nanoparticles are being investigated for a number of medical applications; however, their use in vivo has been questioned because the potential bioaccumulation. To obviate this problem, silica nanoshells were tested enhanced biodegradability by doping iron(III) into nanoshells. Exposure doped to small molecule chelators and mammalian serum was explored test whether removal from nanoshell structure would facilitate its degradation. Iron chelators, such as EDTA, desferrioxamine,...

The detection of nitroaromatic molecules in air by the quenching photoluminescence porous silicon (porous Si) films has been explored. Detection is achieved monitoring (PL) a nanocrystalline Si film on exposure to analyte interest flowing stream. quenched nitroaromatic, presumably an electron-transfer mechanism. limits 500 parts-per-billion (ppb), 2 ppb, and 1 ppb were observed for nitrobenzene, 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), respectively (exposure times 5 min each,...

Colloidal oligo(tetraphenyl)silole nanoparticles in THF/H2O suspensions show increased luminescence and offer a method to detect TNT an aqueous environment.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCone angles for amine ligands. X-ray crystal structures and equilibrium measurements ammonia, ethylamine, diethylamine, triethylamine complexes with the [bis(dimethylphosphino)ethane]methylpalladium(II) cationAllen L. Seligson William C. TroglerCite this: J. Am. Chem. Soc. 1991, 113, 7, 2520–2527Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, reactions, and molecular structures of trans-hydrido(phenylamido)bis(triethylphosphine)platinum(II) trans-hydridophenoxobis(triethylphosphine)platinum(II)Robert L. Cowan William C. TroglerCite this: J. Am. Chem. Soc. 1989, 111, 13, 4750–4761Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature of the frontier orbitals in phosphine, trimethylphosphine, and trifluorophosphineShenxiu Xiao, William C. Trogler, D. E. Ellis, Ziva Berkovitch-YellinCite this: J. Am. Chem. Soc. 1983, 105, 24, 7033–7037Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inissue 1 November 1983https://pubs.acs.org/doi/10.1021/ja00362a004https://doi.org/10.1021/ja00362a004research-articleACS PublicationsRequest...

The syntheses, spectroscopic characterization, and fluorescence quenching efficiencies of 1,1-silole− 1,1-silafluorene−phenylenedivinylene polymers are reported. Model dimeric metallole compounds containing a phenylenedivinylene bridge have been synthesized to provide detailed structural insight into conformational effects electron delocalization. Poly((tetraphenyl)silole−phenylenedivinylene) poly(silafluorene−phenylenedivinylene) both maintain regioregular trans-vinylene Si−C backbone with...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrolysis of phosphate diesters with copper(II) catalystsJanet R. Morrow and William C. TroglerCite this: Inorg. Chem. 1988, 27, 19, 3387–3394Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published inissue 1 September 1988https://pubs.acs.org/doi/10.1021/ic00292a025https://doi.org/10.1021/ic00292a025research-articleACS PublicationsRequest reuse permissionsArticle Views998Altmetric-Citations111LEARN ABOUT...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanism of nitrile hydration catalyzed by unhindered hydridobis(phosphine) platinum(II) complexes. Regioselective acrylonitrileCraig M. Jensen William C. TroglerCite this: J. Am. Chem. Soc. 1986, 108, 4, 723–729Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://pubs.acs.org/doi/10.1021/ja00264a025https://doi.org/10.1021/ja00264a025research-articleACS...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCis and trans effects on the proton magnetic resonance spectra of cobaloximesWilliam C. Trogler, Robert Charles. Stewart, Leon A. Epps, Luigi G. MarzilliCite this: Inorg. Chem. 1974, 13, 7, 1564–1570Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ic50137a005https://doi.org/10.1021/ic50137a005research-articleACS PublicationsRequest reuse...