10102-43-9Relevant articles and documents
Photodissociation of NO2 Adsorbed on LiF(001)
Dixon-Warren, St. J.,Jackson, R. C.,Polanyi, J. C.,Rieley, H.,Shapter, J. G.,Weiss, H.
, p. 10983 - 10994 (1992)
The photochemistry of NO2 physisorbed on single-crystal LiF(001) at 100 K has been studied at λ1 = 248 nm.The adsorbate was examined by polarized FTIR in both the presence and absence of λ1 radiation.In the absence of UV irradiation the adlayer is composed of dimeric (NO2)2.In the presence of UV, FTIR shows that some N2O3 is formed.Photodissociations(PDIS) giving both NO(g) and molecular NO2(g) were the predominant mechanisms as determined by time-of-flight mass spectrometry (TOF-MS) and resonantly enhanced multiphoton ioniziation (REMPI).The main objective of this work was the characterization of the photoproduct, NO, internal state distribution by 1 + 1 REMPI.Vibrational levels from v = 0 to 9 were probed with rotational resolution using a tunable laser, λ2.The rotational distributions for each vibrational level could be described by one Boltzmann temperature.The spin-orbit states of NO(g) were equally populated in all vibrational levels.The lambda doublet states, Π(A') and Π(A ), were equally populated.The principal observation was that the vibrational distribution in NO(g) was inverted and bimodal with a peak in v = 0 and a second substantial peak in v = 3-4, qualitatively resembling but qualitatively different from that for photolysis of NO2(g).Time delays between the two lasers were used to probe the translational energy of the NO(g) photofragment in specified states of internal excitation.The transational energy distributions were invariant over all vibrational levels, except v = 0 for which much slower fragments were observed.This complete determination of the energy distribution in the degrees of freedom of the NO(g) from photodissociation of adsorbate has implications for the identity of the photolyzing species and the dynamics of photodissociation.Two mechanisms for photoformation of NO2(g) were found: one at low coverages and one at higher coverages, the former giving peak translational energies ca. 1.2 kcal/mol and the latter 0.4 kcal/mol.
Photochemical NO release from nitrosyl RuII complexes with C-bound imidazoles
Holanda, Alda K.M.,da Silva, Francisco O.N.,Sousa, Jackson R.,Diógenes, Izaura C.N.,Carvalho, Idalina M.M.,Moreira, ícaro S.,Clarke, Michael J.,Lopes, Luiz G.F.
, p. 2929 - 2933 (2008)
The series of nitrosyl complexes trans-[Ru(NH3)4L(NO)]Cl3, L = caffeine, theophylline, imidazole and benzoimidazole in position trans to NO were prepared and their photochemical properties studied. All complexes showed nit
A laser flash photolysis study of nitrous acid in the aqueous phase
Ouyang, Bin,Dong, Wenbo,Hou, Huiqi
, p. 306 - 311 (2005)
The OH quantum yield from the photolysis of nitrous acid in the aqueous phase by the 355 nm light was measured to be 0.25 ± 0.03. OH radical thus formed reacted readily with HNO2 to produce NO2, which sequentially reacted with HNO2 to form the HNO2-NO 2 adduct. The NO2 + HNO2 reaction was reversible with a forward rate constant of 3.76 × 107 dm 3 mol-1 s-1 and a backward rate constant of 1.06 × 105 s-1. Decay of the HNO2-NO 2 adduct would most likely generate HNO3 and NO at a rate constant of 3.0 × 103 s-1.
The rotational energy accommodation of NO formed in the catalytic oxidation of NH3 over Pt(111)
Hsu, D. S. Y.,Squire, D. W.,Lin, M. C.
, p. 2861 - 2865 (1988)
Rotational energy distributions of the desorbing NO product from the NH3 + O2 reaction on a Pt(111) single crystal have been measured using the laser-induced fluorescence technique in conjunction with an UHV apparatus.Over the surface temperature range 800-1300 K, the rotational temperature of NO was found to remain virtually constant near 400 K.
Photolysis of the (2-) Ion in Water and Poly(vinyl alcohol) Films: Evidence for Cyano Radical, Cyanide Ion and Nitric Oxide Loss and Redox Pathways
Oliveira, Marcelo G. de,Langley, G. John,Rest, Antony J.
, p. 2013 - 2020 (1995)
Ultraviolet-visible and IR spectroscopy and mass spectrometry have been used to investigate photolysis of the (2-) ion upon irradiation with UV/VIS light in aqueous solutions and in poly(vinyl alcohol) films at 12 and 298 K.Changes in the ν(CN) and ν(NO) bands in the IR and in the d-d and charge-transfer bands in the UV/VIS region were used to monitor the appearance and disappearance of complex ions as a function of photolysis time.Mass spectrometric analysis of the gaseous products released during the irradiation of aqueous solutions revealed NO, HCN, and (CN)2.The combined results showed that the (2-) ion undergoes photoaquation and photoreduction, producing aquacyanoferrate-(III) and -(II) species.The origin of the iron(II) species was shown to be mainly due to the photoreduction of the iron(III) species produced after primary loss of the nitrosyl ligand as molecular NO and not as NO(1+).Subsequent thermal reactions between the iron-(II) and -(III) species led to the formation of mixed-valence compounds, e.g.Prussian blue.A scheme for the photochemical and thermal reactions with CN(.), CN(1-) and NO loss pathways is proposed.The possible implications of the results for the use of (2-) as a vasodilator are discussed.
Reduced graphene oxide-gold nanorod composite material stabilized in silicate sol-gel matrix for nitric oxide sensor
Jayabal, Subramaniam,Viswanathan, Perumal,Ramaraj, Ramasamy
, p. 33541 - 33548 (2014)
A facile synthetic method for the preparation of reduced graphene oxide-gold nanorods embedded in an amine functionalized silicate sol-gel matrix (RGO-Au-TPDT NRs) composite in an aqueous medium and its applications towards the electrochemical sensing of nitric oxide (NO) are reported. The electrochemical characteristics of the RGO-Au-TPDT NRs modified electrode are studied by using cyclic voltammetry. The electrocatalysis and amperometric sensing of NO are studied at physiological pH by using the RGO-Au-TPDT NRs modified electrode. The RGO-Au-TPDT NRs modified electrode shows excellent electrocatalytic activity towards the oxidation of NO due to the synergistic catalytic effect of the RGO-Au-TPDT NRs composite material. The amperometric current is increased linearly while increasing the NO concentration in the range between 10 and 140 nM and the lowest detection limit is estimated as 6.5 nM. The GC-RGO-Au-TPDT NRs modified electrode is simple to prepare and shows fast amperometric response towards NO detection. the Partner Organisations 2014.
Probing the nature of the K-rotor in unimolecular reactions: Scalar and vector correlations in the photodissociation of NCNO
McGivern, W. Sean,North, Simon W.
, p. 7027 - 7034 (2002)
The photodissociation of NCNO at 520 and 532 nm was examined using transient frequency modulation Doppler spectroscopy in order to study vector and scalar correlations in the dissociation. A small correlation between v and J was observed corresponding to Β00(22) bipolar moments ranging from 0.00±0.02 to -0.03±0.02 at 532 nm and 0.00±0.02 to -0.01±0.02 at 520 nm. These were well described by a helicity unrestricted PST formulation at both wavelengths.
Widely differing photochemical behavior in related octahedral {Ru-NO} 6 compounds: Intramolecular redox isomerism of the excited state controlling the photodelivery of NO
De Candia, Ariel G.,Marcolongo, Juan P.,Etchenique, Roberto,Slep, Leonardo D.
, p. 6925 - 6930 (2010)
trans-[(NC)Ru(py)4(μ-CN)Ru(py)4(NO)]3+ (py = pyridine) is a stable species in aqueous solution. It displays an intense absorption in the visible region of the spectrum (λmax = 518 nm; εmax = 6100 M-1 cm-1), which turns this compound into a promising agent for the photodelivery of NO. The quantum yield for the photodelivery process resulting from irradiation with 455 nm visible light was found experimentally to be (0.06 ± 0.01)×10 -3 mol einstein-1, almost 3 orders of magnitude smaller than that in the closely related cis-[RuL(NH3)4(μ-pz) Ru(bpy)2(NO)]5+ species (L = NH3 or pyridine, pz = pyrazine, bpy = 2,2′-bipyridine; φNO = 0.02-0.04 mol einstein-1 depending on L) and also much smaller than the one in the mononuclear compound trans-[ClRu(py)4(NO)]2+ (φNO = (1.63 ± 0.04)×10-3 mol einstein-1). DFT computations provide an electronic structure picture of the photoactive excited states that helps to understand this apparently abnormal behavior.
Catalytic reduction of N2O and NO2 with methane over sol-gel palladium-based catalysts
Oktar, Nuray,Mitome, Junko,Holmgreen, Erik M.,Ozkan, Umit S.
, p. 171 - 182 (2006)
Pd/TiO2 and Gd-doped Pd/TiO2 prepared through a 'one-pot' sol-gel method are shown to be active for the reduction of both N2O and NO2 using CH4 as a reducing agent under excess O2 conditions. In previous studies these catalysts were shown to effectively reduce NO with CH4, however activity was strongly dependant on the oxidation state of Pd. Through the electropositive nature of Gd, Pd was maintained in metallic state under higher oxygen concentrations compared to the Gd-free catalysts. Characterization through XPS and in situ DRIFTS studies indicate that in the reduction of NO2, even under excess oxygen, a significant portion of the surface Pd is maintained in the active metallic state.
[Fe2(μ-SR)2(NO)4]0 complexes with R being phenolyl with different substituents in the meta-position: Synthesis, structure, and NO release
Kozub, Galina I.,Sanina, Nataliya A.,Emel'yanova, Nina S.,Utenishev, Andrey N.,Kondrat'eva, Tat'yana A.,Khrustalev, Vladimir N.,Ovanesyan, Nikolay S.,Kupchinskaya, Nadezhda E.,Aldoshin, Sergey M.
, p. 132 - 139 (2018)
Single crystals of new binuclear tetranitrosyl iron complexes ([Fe2(SR)2(NO)4]) have been synthesized, with R being m-aminophenyl (1) and m-hydroxyphenyl (2). The structure, physical–chemical properties, and NO release of
