290-87-9Relevant articles and documents
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Sloan,Barber
, p. 1073 (1962)
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Vibrational Spectroscopy of Hydrogen Cyanide Clusters
Anex, Deon S.,Davidson, Ernest R.,Douketis, Constantine,Ewing, George E.
, p. 2913 - 2925 (1988)
Molecular beams of monomer HCN and its clusters, generated by supersonic helium expansions, were crossed with the output of an F-center laser operating in the C-H stretching region.The laser was scanned in its low-resolution mode Δν1/2 = 10 GHz (0.3 cm-1), from 3100 to 3400 cm-1 while the molecular beam energy was monitored with a liquid helium cooled bolometer.Excitation spectra of monomer HCN and vibrational photofragmentation spectra of HCN clusters were recorded.Bands associated with unresolved vibration-rotation envelopes were assigned to dimer and trimer transitions.Features corresponding to tetramers and higher polymers were observed but remain unassigned.Under some expansion conditions a photofragmenting solidlike hydrogen cyanide feature was observed.A band corresponding to one of the bound C-H stretching vibrations in the linear trimer was studied under high resolution (15 MHz).For the few comparisons possible, our C-H stretching frequencies are in agreement with other gas-pase measurements.Our results are also consistent with matrix isolation studies when allowances are made for the large solvent shifts possible.Three theoretical approaches were used to predict trends in the C-H stretching frequencies on hydrogen bonding.These are normal-coordinate analysis, a classical electrostatic model, and ab initio quantum mechanics calculations.A critique of these theoretical models is presented.Finally, the observed vibrational predissociation lifetime of the linear trimer is discussed in terms of simple propensity rules.
Bacterial-yeast consortium as an effective biocatalyst for biodegradation of sulphonated azo dye Reactive Red 198
Kurade, Mayur B.,Waghmode, Tatoba R.,Jadhav, Mital U.,Jeon, Byong-Hun,Govindwar, Sanjay P.
, p. 23046 - 23056 (2015/03/14)
A novel bacterial-yeast consortium (Brevibacillus laterosporus and Galactomyces geotrichum) acts as a proficient biocatalyst. It decolorized 92% of sulphonated azo dye Reactive Red 198 (RR 198) within 18 h at a dye concentration of 50 mg L-1 as compared to 58 and 42% decolorization using Brevibacillus laterosporus and Galactomyces geotrichum alone, respectively, in the same experimental conditions (pH 7, 40 °C, in static condition). The cumulative action of enzymes such as veratryl alcohol oxidase, laccase, NADH-DCIP reductase and azoreductase in the consortium culture was responsible for dye degradation. Fourier transform infrared spectroscopy and high performance thin layer chromatography analysis of the dye and its extracted metabolites suggested the biotransformation of RR 198 into simple metabolites; whereas the biotransformation of the same by individual microorganisms was different than by consortial biodegradation. According to gas chromatography-mass spectroscopy studies, RR 198 was biotransformed into much simpler compounds such as (ethylsulfonyl)benzene and 1,3,5-triazine by the bacterial-yeast consortium. This metabolic fate of the dye was entirely different in consortium than when compared to individual microbial treatment. Single microbial species could lead to only partial mineralization of the intact dye molecule; whereas, nearly complete degradation of the dye molecule was achieved using the consortium culture. This study clearly suggests that the consortium has an enormous strength to catalyze RR 198 within a short period as compared to individual microbial cultures. This journal is
Reactions of hydrated electrons with triazine derivatives in aqueous medium
Varghese, Rani,Mohan, Hari,Manoj,Manoj,Aravind, Usha K.,Vandana,Aravindakumar
, p. 8171 - 8176 (2007/10/03)
A study is made of the kinetics and mechanism of the reaction of radiolytically produced hydrated electron (e-aq) with some triazine derivatives [1,3,5-triazine (T), 2,4,6-trimethoxy-1,3,5-triazine (TMT), 2,4-dioxohexahydro-1,3,5-triazine (DHT), 6-chloro N-ethyl N-(1-methylethyl)-1,3,5-triazine 2,4-diamine (atrazine, AT), and cyanuric acid (CA)] in aqueous medium using pulse and steady-state radiolysis techniques. The second-order rate constants were determined from the pseudo first-order decay of e-aq in the presence of triazines at 720 nm, and the values obtained with T, TMT, AT, and CA are in the order of 109 dm3 mol-1 s-1 and that of DHT was 10 8 dm3 mol-1 s-1 at pH 6. The transient absorption spectra from the reaction of e-aq with T and TMT are characterized by their λmax at 310 nm, and those of DHT and CA are around 280 and 290 nm, respectively. However, a very weak and featureless absorption spectrum is obtained from AT. On the basis of the spectral evidence and on the quantitative electron transfer from the transient intermediates to the oxidant, methyl viologen (MV2+), the intermediate radicals are assigned to N-protonated electron adducts (with the unpaired spin density at carbon) of triazines. The degradation profiles, monitored as the disappearance of parent triazine concentrations as a function of dose, obtained with AT, TMT, CA, and DHT, highlight the potential use of e-aq in the degradation of triazines.
