نتایج جستجو برای: adsorption ch3oh
تعداد نتایج: 55518 فیلتر نتایج به سال:
Using the anionic precursor [(Tp)Fe(CN)3]-, a new one-dimensional Ising cyanide-bridged chain, [(Tp)2FeIII2(CN)6Cu(CH3OH).2CH3OH]n, has been prepared. The crystal structure and magnetic studies demonstrate that it is a single-chain magnet and the blocking temperature is ca. 6 K.
Context. Massive young stellar objects (MYSOs) with hot cores are classic sources of complex organic molecules. The origins of these molecules in such sources, as well as the smalland large-scale differentiation between nitrogenand oxygen-bearing complex species, are poorly understood. Aims. We aim to use complex molecule abundances toward a chemically less explored class of MYSOs with weak hot...
To rationalize the efficient quenching of the fluorescence and the Z → E photoisomerization of m-ABDI, the meta-amino analogue of the green fluorescent protein (GFP) chromophore, in protic solvents, the femtosecond time-resolved fluorescence and transient infrared (TRIR) spectra of m-ABDI in CD3CN, CH3OH, and CD3OD are determined. For solutions in CD3CN, the fluorescence decay lifetime is ∼7.9 ...
CH3OH temperature programmed surface reaction (TPSR) spectroscopy was employed to determine the chemical nature of active surface sites for bulk mixed metal oxide catalysts. The CH3OH-TPSR spectra peak temperature, Tp, for model supported metal oxides and bulk, pure metal oxides was found to be sensitive to the specific surface metal oxide as well as its oxidation state. The catalytic activity ...
We present conclusive evidence on the formation of glycolaldehyde (HOCH2CHO) synthesized within astrophysically relevant ices of methanol (CH3OH) and methanol-carbon monoxide (CH3OH-CO) upon exposure to ionizing radiation at 5.5 K. The radiation induced chemical processes of the ices were monitored on line and in situ via infrared spectroscopy which was complimented by temperature programmed de...
We have imaged emission from the millimeter lines of eight molecules—C2H, C 34S, N2H +, CH3OH, HNCO, HNC, HC3N, and SO—in the central half kiloparsec of the nearby spiral galaxy IC 342. The 5 (∼ 50 pc) resolution images were made with the Owens Valley Millimeter Array (OVRO). Using these and previously published CO and HCN images we obtain a picture of the chemistry within the nuclear region on...
Collision induced dissociation (CID) of the m/z 479 ion, formed by ESI of Co(NO3)2-CH3OH solutions with either pure (1S,2S)-(+)-N-methylpseudoephedrine or its mixtures with (1S,2R)-(+)- or (1R,2S)-(-)-ephedrine, provides compelling evidence for fast, stereoselective reactions in Co(II)/neurotrasmitter(s) aggregates during solvent evaporation of the ESI droplets.
One chiral heterotrimetallic compound, [Cu(H2O){(R,R)-valcy}Tb(CH3OH)2(H2O)(?-CN)Fe(CN)5]·[Cu(H2O){(R,R)-valcy}Tb(CH3OH)1.5(H2O)1.5(?-CN)Fe(CN)5]·7.85H2O·2CH3OH (1) (H2(R,R)-valcy = N,N?-bis(3-methoxysalicylidene)-1R,2R-1,2-diaminocyclohexane), has been prepared and structurally characterized by X-ray single-crystal diffraction. In 1, the asymmetric trinuclear {CuIITbIIIFeIII} units are assembl...
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