A major challenge in nanoscience and nanotechnology is the rational assembly of nanoscale objects. Here we report that gold nanorods, aspect ratio 18, can be functionalized with a biotin disulfide, subsequent addition streptavidin links rods together an end-to-end manner much more often than expected.

Sensitivity to chromium, cobalt, nickel, molybdenum, vanadium, and titanium was studied by patch tests in 50 patients who had received total joint replacements. Nineteen (38%) were sensitive one or more of the metals. In 23 non-traumatic failure prosthesis occurred, 15 these metal. Out 27 with no evidence loosening, four nickel cobalt only. Dermatological reactions occurred 13 after surgery; only eight, however, there metal sensitivity. These findings indicate that metal-on-metal...

Three polar poly(para-phenylene ethynylene)s (PPE) were synthesized by utilizing the Heck-Sonogashira protocol. Two of PPEs carry beta-glucopyranose substituents. Depending upon linker used between glycol units and backbone, fluorescence these can be quenched Hg2+ Pb2+ to a varying degree. Monomeric model compounds that are substituted with only one glucose unit not efficiently quenched. The presence many substituents in PPE assembly led large increase binding constant quenching was amplified.

Three different cruciforms containing the 1,4-bis-4'-pyridylethynyl-2,5-distyrylbenzene or 1,4-bis-phenylethynyl-2,5-distyrylbenzene unit were synthesized and investigated with respect to their metal sensing properties. Upon addition of cations these cruciforms, either a bathochromic hypsochromic shift in emission absorption is observed. The depends on whether coordinates preferentially pyridine dibutylaniline branches cruciforms. three exposed selection dichloromethane, was examined. show...

Microstructuring of conjugated polymers is facile utilizing the breath figure approach. Dilute solutions in carbon disulfide form highly ordered 2D hexagonal bubble arrays (see Figure and inside cover). The are obtained if moist air blown over polymer solutions. Evaporative cooling leads to condensation water droplets onto liquid surface. After solvent evaporated, array observed.

The photophysics of dialkylamino- and/or pyridine-containing functional chromophores, 1,4-distyryl-2,5-bis(ethynylaryl)benzenes (cruciforms) was investigated; their fluorescence quantum yields and emissive lifetimes were determined. Depending upon substituents, the frontier molecular orbitals (FMOs) these cruciforms are either congruent, i.e., HOMO LUMO occupy same real space, or disjoint, is located on one branch cruciform while second one. Donor-acceptor substitution leads to a disjoint...

1. The pathology of rupture the ulnar collateral ligament thumb (gamekeeper's thumb) has been presented. 2. A new procedure which provides dynamic stabilization metacarpophalangeal joint in function pinch by advancement insertion adductor pollicis described. 3. It emphasized that arthrodesis rather than is indicated presence arthrosis.

A series of chirally substituted poly (p-phenyleneethynylene) copolymers was prepared by alkyne metathesis mixtures two different 2,5-dialkyl-1,4-dipropynylbenzenes. One the monomers chiral bis-2,5-(S)-3,7-dimethyloctyl-1,4-dipropynylbenzene, and second one an achiral dipropynyl monomer. If content monomer is 25-50 mol %, unusually large chiroptical effects, that is, optical dissymmetries, result in absorption (g = -0.38) emission -0.19) these copolymers. The dissymmetries can be explained a...

ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication the EditorNEXT"Surfactochromic" Conjugated Polymers: Surfactant Effects on Sugar-Substituted PPEsJohn J. Lavigne*†, Dana L. Broughton†, James N. Wilson†‡, Belma Erdogan†‡, and Uwe H. F. Bunz*‡View Author Information Department of Chemistry Biochemistry, University South Carolina, Columbia, Carolina 29208, School Georgia Institute Technology, Atlanta, 30332 Corresponding authors. E-mail: [email protected]; protected].†...

We recently described the assembly of fluorescent deoxyriboside monomers ("fluorosides") into DNA-like phosphodiester oligomers (oligodeoxyfluorosides or ODFs) in which hydrocarbon and heterocyclic aromatic fluorophores interact both physically electronically. Here we report identification a multicolor set water-soluble ODF dyes that display emission colors across visible spectrum, all can be simultaneously excited by long-wavelength UV light at 340−380 nm. Multispectral dye candidates were...

Nine combinations of pi-electron donors and acceptors were examined by UV-vis, fluorescence (1)H-NMR spectroscopy to identify pi-stacked charge transfer complexes in macromolecular supramolecular constructs. The high association constant pyrene naphthalene diimide suggests a preferentially pi-stacking pair rationalized frontier orbital congruence.

An acetylene dye rotaxane with α-CD has been synthesized using the Heck−Cassar−Sonogashira−Hagihara-type reaction in aqueous solution. Free tetracarboxylic acids is found to be highly sensitive various metal ions, showing high Stern−Volmer constants, KSV. As CD encapsulation protects and stabilizes threaded chromophore against an outside quencher, metal-insensitive biological tags are obvious application for this class of molecules.

The structure of a 5-fluorouracil carrier and fluorescent image an animal after injection under magnetic field.

Grease-gun injuries are an undesirable side effect of our modern machine age. Since methods high-pressure lubrication used in automobile, airplane, and missile industries, more such can be expected. The seriousness these should recognized so that prompt adequate treatment reduce the resulting disability. hand best treated by immediate surgical removal as much grease possible. This will prevent ischemic gangrene fibrosis scarring.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAging of Silica-Alumina Cracking Catalyst. I. Kinetics Structural Changes by Eeat and SteamW. G. Schlaffer, C. Z. Morgan, J. N. WilsonCite this: Phys. Chem. 1957, 61, 6, 714–722Publication Date (Print):June 1, 1957Publication History Published online1 May 2002Published inissue 1 June 1957https://doi.org/10.1021/j150552a003RIGHTS & PERMISSIONSArticle Views118Altmetric-Citations43LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum...

The cruciform pentamers 3a-g were synthesized by a combined Horner-Sonogashira approach; their band gaps vary significantly with emission varying from blue to red depending upon substituent pattern.

Perivascular adipose tissue (PVAT) reduces vasoconstriction to norepinephrine (NE). A mechanism by which PVAT could function reduce vascular contraction is decreasing the amount of NE vessel exposed. PVATs from male Sprague-Dawley rats were used test hypothesis that has a uptake mechanism. was detected HPLC in mesenteric and isolated adipocytes. Uptake (10 μM) reduced transporter (NET) inhibitor nisoxetine (1 μM, 73.68 ± 7.62%, all values reported as percentages vehicle), 5-hydroxytryptamine...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMeasurement of a Reaction Rate at Equilibrium by Means Radioactive Indicator. The between Arsenic Acid and IodineJ. Norton Wilson Roscoe G. DickinsonCite this: J. Am. Chem. Soc. 1937, 59, 7, 1358–1361Publication Date (Print):July 1, 1937Publication History Published online1 May 2002Published inissue 1 July 1937https://pubs.acs.org/doi/10.1021/ja01286a057https://doi.org/10.1021/ja01286a057research-articleACS PublicationsRequest reuse...

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTBand Gap Engineering of Poly(p-phenyleneethynylene)s: Cross-Conjugated PPE−PPV HybridsJames N. Wilson, Paul M. Windscheif, Una Evans, Michael L. Myrick, and Uwe H. F. BunzView Author Information Department Chemistry Biochemistry, USC NanoCenter, The University South Carolina, Columbia, Carolina 29208, Hirsch-Apotheke von 1836, Biergasse 1, D-53498 Bad Breisig, FRG Cite this: Macromolecules 2002, 35, 23,...