Nanotechnology

  2010 MAR 15 - (VerticalNews.com) -- "Nano-sized crystals of maghemite iron oxide (gamma-Fe2O3) were synthesized onto the surface of NaY-zeolite crystals by immobilizing a polynuclear iron complex [Fe4O2(O2CCH3)(7)(bpy)(2)](ClO4) (bpy = 2,2'-bipyridine) and subsequent calcination of the material in oxygen. Superparamagnetic gamma-Fe2O3 particles with sizes similar to 5 nm were formed on the surface of the zeolite matrix," investigators in Calcutta, India report ...read more

  2010 MAR 15 - (VerticalNews.com) -- According to recent research from New Delhi, India, "Several new poly(alkylarylsilane)s, [Et3Si(CH2)(2)Si(C6H4R)](n) [R = H (1), p-Me (2), p-OMe (3), p-NMe2 (4)] with M-w = 2.9-4.6 x 10(3) and PDI = 1.41-1.64, have been synthesized by dehalocondensation of appropriate dichlorodiorganosilanes using Na dispersion in refluxing toluene. The or electronic transitions associated with the silicon backbone of 1-4 exhibit a progressive red shift (lambda(max): 320-342 nm) as a result of increasing electron donating ability of the substituent on the phenyl ring. ...read more

  2010 MAR 15 - (VerticalNews.com) -- According to a study from Xian, People's Republic of China, "Two novel 3-D hybrid supramolecular isomers, namely, alpha-[Cu-2(ABPT)(2)(H2O)(2)(Mo8O26)](n) (1) and beta-[ Cu-2(ABPT)(2)(H2O)(2)(Mo8O26)](n)center dot 4nH(2)O (2), have been successfully isolated from one-pot hydrothermal crystallization and characterized. Single-crystal X-ray diffractions show that the ABPT ligands in compound 1 taking the transoid-configuration to link distorted octahedral copper centers into 1-D metal-organic chains, which are further interlaced by [Cu-2(gamma-Mo8O26)] inorganic ladder-like chains to generate a 3-D hybrid structure. ...read more