A re-examination of the CS2 laser

Wavelength measurements on an optically pumped CS₂ laser are reported. The lasing lines are assigned to the 00°1 → 10°0 transition.     

Photochemical decomposition of the CS2N3 ion

The pseudo-halide 1, 2, 3, 4-thiatriazol-5-thiolate, in the anion and acid forms, undergoes photochemical decomposition with the formation of sulfur, nitrogen and the thiocyanate anion, with quantum yields (θ₃₁₃) of 0.13 and 0.26 for the acid and anion forms, respectively.     

Laser induced aerosol formation in CS2 vapour

We observed the formation of aerosol particles in CS₂ vapour irradiated by 337 nm nitrogen laser light. Various interesting features of the kinetics of the formation process are reported. The chemical nature of the photoreaction products giving rise to the formation of aerosol particles is also discussed.     

OCS formation in the reaction of OH with CS2

A steady-state system involving photolysis of HONO as a source of OH was used to investigate the reaction of OH with CS₂ at 1 atm and 295 K. In the presence of O₂ ( > 40 Torr) a rapid reaction of OH with CS₂ occurs giving OCS. At lower O₂ concentrations, OCS formation ceases. In air the overall rate constant for OH + CS₂ → OCS was (1.7 ± 0.9) × 10^?12 cm³ molecule^?1 s^?1.     

Comparison of the sulfurization of CoMoK/Al2O3 catalyst with H2S and CS2

Only H₂S consumption and H₂O formation was found in the sulfurization of CoMoK/Al₂O₃ water gas shift catalyst with H₂S/H₂, but CO₂ was formed first, then CH₄, H₂O and H₂S appeared in the later part of TPS with CS₂/H₂. Carbon deposition on the catalyst during the sulfurization with CS₂/H₂ caused a lower activity than the catalyst sulfurized with H₂S but could be removed in the run of WGS reaction.

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, CoMoK/Al₂O₃, H₂S/H₂ H₂S H₂O, CS₂/H₂ CO₂ CH₄, H₂O H₂S. CS₂/H₂ H₂S, , .

     

The forbidden raman (v2, πu) transition in crystalline CS2

Raman spectra associated with the v₂(π_u) bending vibration of CS₂, which is forbidden for an isolated molecule, are presented The spectra are assigned to combination bands with phonons and show well-resolved critical point structure.     

Pair correlation functions of liquid CS2. A comparison between statistical-mechanical theories and computer simulation

The atom pair correlation functions of liquid CS₂ were calculated by RISM theory and the normalized expansion coefficients of the generalized pair correlation function evaluated by a cluster expansion. We used Lennard-Jones interactions between the atoms constituting the molecules. All correlation functions are compared to a computer simulation.     

Multiphoton excitation of CS2 with a narrow-band KrF laser

Multiphoton excitation of CS₂ by means of a frequency-narrowed tunable KrF laser (248 nm) leads to ionisation and photofragment fluorescence from CS(A ¹Π) and CS(d³Δ). Emission spectra can be obtained without any interference from the strong laser-induced flourescence from CS(X¹Σ⁺) observed in previous work with broad-band KrF laser. Excitation and fragmentation mechanisms are discussed within the context of higher Rydberg states of CS₂.     

Dynamics of a CO chemical laser initiated by flash photolysis of CS2NO2

The time-resolved spectrum and small signal gain of CO laser emission obtained from flash photolysed CS₂NO₂ are reported and analysed. It is suggested that NO₂ efficiently quenches high vibrational levels of CO. A method is described for using the gain characteristics to estimate the quenching rates.     

An efficient, one-pot synthesis of trithiocarbonates from alcoholic tosylates using the Cs2CO3/CS2 system

A single-step novel protocol for the preparation of symmetrical trithiocarbonates from a corresponding variety of primary, secondary, and tertiary alcoholic tosylates using the Cs₂CO₃/CS₂ system, was developed. This protocol is mild and more efficient than the reported methods.     

Entanglement and Energy for Vibrationally Localized States in Molecule CS2

The dynamics of quantum entanglement described by the von Neumann entropy is studied for the localized states of Fermi-resonance coupling vibrations in molecule CS₂, where the interacting energy between the stretching and the bending modes is considered to establish a connection between entanglement and energy. It is shown that entanglement reveals dominant anti-correlation with the interacting energy for the stretch-localized state, while that exhibits dominantly positive correlation for the bend-localized state. The entanglement and the energy for the dislocalized states are discussed as well. Those are useful for molecular quantum computing and quantum information in high dimensional states.     

Al_(2)O_(3)-Zn-K催化水解COS和CS_(2)的研究北大核心CSCD

以活性氧化铝为载体,浸渍负载Zn、K活性组分,制备优选Al_(2)O_(3)-Zn-K催化剂.考察了反应工艺条件对COS、CS_(2)脱除精度的影响,并对失活的催化剂进行表征,分析催化剂的失活原因.结果表明,负载Zn、K活性组分后,催化剂的弱碱性中心显著提高,负载量为4%时催化剂具有最优的水解活性.在180℃催化水解过程中,工艺条件对CS_(2)脱除精度的影响较COS更为明显.无氧条件下,反应过程中生成的硫酸盐和表面活性物质发生迁移导致催化剂碱性中心减少是催化剂失活的主要原因.     

Isotropic raman scattering study of the ν1 mode of OCS and CS2 in n-alkanes

The isotropic Raman bandwidths of ν₁ of OCS and CS₂ in n-heptane and of OCS in n-dodecane have been measured at variable temperature and of OCS in the n-alkane series at ambient temperature. Results are compared to Oxtoby's hydrodynamic theory for vibrational dephasing. Agreement if good in heptane and bad in dodecane. Conclusions are derived on the applicability of the theory.     

The effects of anisotropic atom-atom interactions on the crystal structure and lattice dynamics of solid CS2

Good agreement with the experimental structure and with the observed lattice frequencies of crystalline CS₂ is obtained using an intermolecular potential consisting of an electrostatic part and of an anisotropic atom-atom potential. The role of anisotropic short-range interactions in the statics and dynamics of linear-molecule crystals is discussed.     

Steady state activity of acidic, basic and amphoteric oxides in the CO2+CS2=2COS reaction

Under steady state conditions also La₂O₃ and ThO₂, both having strong ionic character, unfilled d- and f-orbitals and a large metal ion radius proved to be order(s) of magnitude more active than oxides of s, sp and d-metals.     

气相中Nb＋活化CS2中的C-S键

以Nb＋与CS2反应作为第二前过渡金属离子与CS2反应生成金属硫化物离子和CS的范例体系．采用密度泛函UB3LYP方法,对于Nb＋采用Stuttgart赝势基组,对于C和S采用6—311＋G（2d）基组,计算研究了Nb＋在基态和激发态时与CS2气相反应的机理．全参数优化了反应势能面上各驻点的儿何构型,并且用频率分析方法和内禀反应坐标方法对过渡态进行了验证．结果表明Nb＋与CS2的反应是插入-消去反应,在反应过程中会发生系间窜越,并且找到了两个势能面的能量最低交叉点．     

Cationic Rydberg states observed in resonantly enhanced electron spectra of CS2

The inner valence electron spectrum of the CS₂ molecule has been investigated in the binding energy range between 18.6 and 26.3 eV using synchrotron radiation for ionisation. Photon energies in the range from 67 to about 167 eV have been used, with particular focus on 166.70, 166.89 and 167.09 eV for which S2p electrons are resonantly transferred into Rydberg orbitals close to the ionisation threshold. From there, autoionisation takes the molecule into various cationic states characterized by two valence holes and a Rydberg spectator electron. Many new bands are observed which contain vibrational progressions with spacings around 120 meV in most cases. These are assigned as excitations of the totally symmetric stretching ν₁ mode in the cationic state. The new bands reflect states in the cation that are close to the electronic states of the dication and assignments are made by comparison to double ionisation electron spectra.     

Enhancement by polar solute of interaction-induced IR absorption in liquid CS2

The enhancement of the “forbidden” infrared absorption in the ν₁, symmetric stretch, band of CS₂ by small concentrations of CH₃CN, was studied both experimentally and via MC simulation.