The Continuous Absorption Spectra of Chlorine, Bromine, Bromine Chloride, Iodine Chloride, and Iodine Bromide

Seery, D.J.; Britton, Doyle

doi:10.1021/j100790a039

Cited by 267 publications

(90 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…• C) of Seery and Britton [26] is shown in the graph. One can discern that the A band absorption continuum is obviously dominated by the allowed…”

Section: Resultsmentioning

confidence: 99%

Survey of the Excited State Dissociation οf Gas-Phase Bromine Monochloride in the Visible-Near UV Wavelength Region

Zhang

2010

Acta Phys. Pol. A

View full text Add to dashboard Cite

The spectroscopic transitions and photoabsorption/dissociation processes of bromine monochloride (BrCl) via several low-lying covalently bound electronic states and repulsive states have been investigated by performing electronic structure calculations and wave packet simulations of nuclear motion. The absorption spectra for 52-electron singlet systems are obtained by employing time-dependent propagation methods or the real-time propagation of the time-dependent Schrödinger equations in the adiabatically exact approximation. Based on the elastic scattering calculations, the results of angular distributions of the products of photodissociation of BrCl molecules are examined on two aspects: (1) the nature of the state that is prepared by excitation from a bound level into a continuum, and (2) under avoided crossing cases, the influences of nonadiabatic coupling processes on the fragmentation process are evaluated by virtue of a semiclassical Landau-Zener model, which treats an avoided crossing between two states of a given nature and evaluates a nonadiabatic effect relevant to the molecule during photodissociation. The model qualitatively reproduces the key aspects of the full processes related to the transfer of dissociating flux between states of 0 + symmetry, indicating that the proposed coupling scheme is generally correct.

show abstract

“…• C) of Seery and Britton [26] is shown in the graph. One can discern that the A band absorption continuum is obviously dominated by the allowed…”

Section: Resultsmentioning

confidence: 99%

Survey of the Excited State Dissociation οf Gas-Phase Bromine Monochloride in the Visible-Near UV Wavelength Region

Zhang

2010

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…To assure that the reaction reached equilibrium an absorption spectrum was recorded and decomposed into the three components. The chemical equilibrium yields fractions of 55% BrC1, 26% CI2, and 19% Br2 The contribution of C12 dissociation to the TOF signal was estimated using these fractions and the known absorption probabilities (3). At the shortest wavelength used (i.e., 389 nm) C12 contributes less than 8% to the signal when detecting the C I (~P~/~) fragments and less than 1% in the case of the C I * (~P~/~) fragments.…”

Section: Methodsmentioning

confidence: 99%

“…Also displayed is the absorption spectrum (solid line) obtained from ref. 3. By multiplying these two curves, the product yield spectra of the Cl* fragment (broken line) and similarly of the CI fragment (dash-dotted line) were obtained.…”

Section: Fig 2 (A)mentioning

confidence: 99%

Non-adiabatic photodissociation dynamics of BrCl

Cao¹,

Loock²,

Qian³

1994

Can. J. Chem.

View full text Add to dashboard Cite

This paper is dedicated to Professor John C. Polnnyi on the occasiorz of his 65th birthday JIANYING CAO, HANS-PETER LOOCK, and CHARLES X.W. QIAN. Can. J. Chem. 72,758 (1994).Nozzle-cooled BrCl was excited with tunable laser radiation at selected wavelengths between 389 and 500 nm. The chlorine atomic fragments in their c~* (~P , /~) and c~(~P~/~) state were stated-selectively probed by resonance-enhanced multiphoton ionization. The branching ratio (Cl"l(C1 + CI*)) was measured as a function of the excitation wavelength. The relative Cl* yield reaches a maximum at around A hot = 460 nm. Decomposition of these branching ratios into C1 and Clg: photofragment yield spectra provides insight into the b r~1 B-state 311(0+) non-adiabatic dissociation dynamics. Our results suggest that the dissociation mechanism involves non-adiabatic transitions among O+ potential energy curves.JIANYING CAO, HANS-PETER LOOCK et CHARLES X.W. QIAN. Can. J. Chem. 72,758 (1994).On a excitC du BrCl refroidi h l'aide d'un rayonnement laser adjustable h diverses longueurs d'onde allant de 389 h 500 nm. Faisant appel h une ionisation multiphotonique rehaussCe par resonance, on a examink sklectivement les divers Ctats des fragments atomiques du chlore dans leurs Ctats C~* (~P ,~~) et c~(~P~/~) .On a mesurk le rapport de branchement (Cl'V(C1 + Cl*:)) en fonction de la longueur d'onde de l'excitation. Le rendement relatif de Cl* atteint un maximum environ Aphot = 460 nm. La dCcomposition de ces rapports de branchement en spectres de rendement des photofragments C1 et Cl* fournit des donnkes sur la dynamique de la dissociation non-adiabatique de l'Ctat B, 311(0+), du BrC1. Nos rCsultats suggkrent que le mecanisme de dissociation implique des transitions non-adiabatiques parmi les courbes d'Cnergie potentielle O+.[Traduit par la rkdaction] Introduction When two or more potential energy surfaces (PES) are involved in photodissociation processes, non-adiabatic interactions among these surfaces can influence the dynamics significantly. In particular, if at least one of the photofragments has a non-vanishing angular momentum, non-adiabatic transitions are most likely to be observed. In this situation, more than one exit channel is readily accessible so that, even if the dissociation was initiated on a single PES, the non-adiabatic interactions are unavoidable during the fragmentation process (1).A simple example of non-adiabatic transitions is given when only two potential energy curves with an avoided crossing are involved (see, for example, ref. 2). If the kinetic energy near the interaction region is small, the dissociation will proceed adiabatically, i.e., the molecule stays on the initially prepared adiabatic curve throughout the dissociation. For significantly higher kinetic energy, the dissociation can proceed diabatically and the molecule jumps to the other potential energy curve.In a realistic molecular system, however, several potential curves are normally involved. It is important to study the non-adiabatic transitions among these curves to u...

show abstract

“…The bands at 294 nm and 362 nm can be attributed to the spin-allowed g → *u and g → *u absorptions of the I5 -ions. [40][41][42] The UV/vis spectrum of 3 in acetonitrile is marked by three weak absorption bands at 644, 903 and 1073 nm which can be ascribed to the 3 A2g → 3 T1g(F) and 3 A2g → 3 T2g(P) transitions (the latter split by lower symmetry) of octahedral Ni 2+ (3d 8 , SNi = 1) ions. [43] Values below 500 nm are either associated with - transitions within the ligand or with RS -→ Ni 2+ ligand-to-metal charge transfer transitions.…”

Section: Synthesis and Characterization Of Complexes 2 Andmentioning

confidence: 99%

Interplay of Magnetic Exchange Interactions and NiSNi Bond Angles in Polynuclear Nickel(II) Complexes

Krupskaya¹,

Alfonsov²,

Parameswaran³

et al. 2010

ChemPhysChem

View full text Add to dashboard Cite

The ability of bridging thiophenolate groups (RS -) to transmit magnetic exchange interactions between paramagnetic Ni(II) ions has been examined. Specific attention was paid to complexes with large Ni-SR-Ni angles. For this purpose, dinuclear [Ni2Land trinuclear [Ni3L 2 (OAc)2][BPh4]2 (3), where H2L 1 and H2L 2 represent 24-membered macrocyclic amino-thiophenol ligands, were prepared and fully characterized by IR-and UV-vis spectroscopy, X-ray crystallography, static magnetization M measurements and high-field electron spin resonance (HF-ESR). The dinuclear complex 2 has a central N3Ni2(-S)2(-OAc)Ni2N3 core with a mean Ni-S-Ni angle of 92°. The macrocycle L 2 supports a trinuclear complex 3, with distorted octahedral N2O2S2 and N2O3S coordination environments for one central and two terminal Ni(II) ions, respectively. The Ni-S-Ni angles are at 132.8° and 133.5°. We find that the variation of the bond angles has a very strong impact on the magnetic properties of the Ni complexes. In the case of the Ni2-complex, temperature T and magnetic field B dependencies of M reveal a ferromagnetic coupling J = -29 cm -1 between two Ni(II) ions (H = JS1S2). HF-ESR measurements yield a negative axial magnetic anisotropy (D < 0) which implies a bistable (easy axis) magnetic ground state. In contrast, for the Ni3-complex we find an appreciable antiferromagnetic coupling J' = 97 cm -1 between the Ni(II) ions and a positive axial magnetic anisotropy (D > 0) which implies an easy plane situation.

show abstract

The Continuous Absorption Spectra of Chlorine, Bromine, Bromine Chloride, Iodine Chloride, and Iodine Bromide

Abstract: The continuous absorption spectra for gaseous Cl2, Br2, BrCl, IC1, and IBr between 220 and 600 µ are reported. The experimental data have been fitted to theoretical curves of the type suggested by Sulzer and Wieland. The parameters for these curves are given.

Cited by 267 publications

References 1 publication

Survey of the Excited State Dissociation οf Gas-Phase Bromine Monochloride in the Visible-Near UV Wavelength Region

Survey of the Excited State Dissociation οf Gas-Phase Bromine Monochloride in the Visible-Near UV Wavelength Region

Non-adiabatic photodissociation dynamics of BrCl

Interplay of Magnetic Exchange Interactions and NiSNi Bond Angles in Polynuclear Nickel(II) Complexes

Contact Info

Product

Resources

About