نتایج جستجو برای: tellurium iv

تعداد نتایج: 188600  

Journal: :Coordination Chemistry Reviews 2022

• Te?N secondary-bonding features in supramolecular aggregates crystals. Zero-, one-, two- and three-dimensional architectures feature interactions. interactions are found 11% of crystals where they can potentially form. 1,3-Benzotellurazoles prone (80%) to form their One-dimensional chains tapes 50% examples. Supramolecular aggregation patterns featuring have been identified the tellurium(II) ...

Journal: :Dalton transactions 2015
Elisa I Carrera Dwight S Seferos

We present the reactivity and photochemistry of 2,5-diphenyltellurophene. A change in oxidation state from Te(ii) to Te(iv) occurs by oxidative addition of bromine, chlorine, and fluorine from appropriate halogen sources. Photoreductive halogen elimination is demonstrated using optical absorption spectroscopy and NMR spectroscopy. The photodebromination reaction occurs with 16.9% quantum yield,...

Journal: :Fresenius' journal of analytical chemistry 2000
L Li P He Y Fang

A highly sensitive and selective catalytic method with 2.5-order differential oscillopolarographic detection is described for the determination of tellurium, based on its activation effect on the slow Pd(II)-catalyzed reaction of sodium hypophosphite and methyl red in hydrochloric acid medium at 100 degrees C. Methyl red exhibited a sensitive 2.5-order differential polarographic wave at -0.35 V...

2005
Luciana W. da Silva Massoud Kaviany Ctirad Uher

Coevaporated bismuth-tellurium and antimony-tellurium films were fabricated under various deposition conditions scontrolled evaporation rates of individual species, substrate temperature, and substrate materiald, and their thermoelectric sTEd properties sSeebeck coefficient, electrical resistivity, and carrier concentrationd were measured in search of optimal TE performance. The tellurium atomi...

Journal: :Nanoscale research letters 2015
Gianfranco Carotenuto Mariano Palomba Sergio De Nicola Giuseppina Ambrosone Ubaldo Coscia

Owing to the very brittle nature of tellurium powder, nanoscopic grains with an average size of 4.8 ± 0.8 nm were produced by dry vibration milling technique using a mixer/mill apparatus. A novel material was obtained by binding the nanosized tellurium grains with poly(methyl methacrylate) (PMMA) polymer. The morphology, elemental composition, and structural and optical properties of Te/PMMA fi...

2016
Robert A. Yokel

BBB blood-brain barrier BMEC brain microvascular (capillary) endothelial cells CBSA cationic bovine serum albumin CdTe cadmium tellurium CTAB trimethylammonium bromide DRG dorsal root ganglia HSA human serum albumin ip intraperitoneal iv intravenous MWCNT multi-walled carbon nanotube PAMAM poly(amidoamine) PBCA polybutylcyanoacrylate PEG polyethylene glycol PLA poly(lactide) PLGA poly(lactic-co...

2004
Shashwati Sen K. P. Muthe Niraj Joshi S. C. Gadkari S. K. Gupta

Tellurium thin films were studied for use as ammonia gas sensors operable at room temperature. The films showed a reversible increase in resistance when exposed to ammonia and the response was found to be linear in the range of 0-100 ppm. The interaction of ammonia with tellurium film was investigated using Raman, X-ray photoelectron and impedance spectroscopy techniques. The results of Raman a...

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