Electronic photodissociation spectroscopy of isolated IrX62- (X=Cl,Br)

被引：59

作者：

Friedrich, J ^{[1
]}

Gilb, S ^{[1
]}

Ehrler, OT ^{[1
]}

Behrendt, A ^{[1
]}

Kappes, MM ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Phys Chem, D-76128 Karlsruhe, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2002年 / 117卷 / 06期

关键词：

D O I：

10.1063/1.1490921

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photodissociation spectra of free doubly charged anions IrX62- (X=Cl,Br) were measured in the photon energy range from 1.5 to 2.9 eV. Both data sets show the same features as the spectra of the respective aqueous solutions. Compared to solution, the gas phase absorption bands of IrBr62- are redshifted by 0.01-0.15 eV. For IrCl62- no such shift could be observed. Photodissociation of IrBr62- results in the formation of Br-, IrBr4-, and IrBr5-. Fluence dependent measurements of fragment formation as well as parent ion depletion, allowed inferences regarding the dissociation pathway and the inner barrier height for the dissociation process which was estimated to be 1.6+/-0.2 eV. From measurements of the kinetic energy released upon fragmentation into monoanions, we estimate the outer barrier height to be 2.2+/-0.2 eV. (C) 2002 American Institute of Physics.

引用

页码：2635 / 2644

页数：10

共 33 条

[21] Charge-transfer band splittings in electronic spectra of mixed ligand halogeno osmium(IV) complexes [J].

Schmidtke, HH ;

Lehnert, N .

INORGANIC CHEMISTRY, 1998, 37 (24) :6373-6381

[22]

SCHOOS D, 1999, THESIS U KARLSRUHE

[23] Photodissociation spectroscopy of Ag4+(N2)m, m=0-4 [J].

Schooss, D ;

Gilb, S ;

Kaller, J ;

Kappes, MM ;

Furche, F ;

Köhn, A ;

May, K ;

Ahlrichs, R .

JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (13) :5361-5371

[24] Electronic effects in the production of small dianionic gold clusters by electron attachment on to stored Aun-, n=12-28 [J].

Schweikhard, L ;

Herlert, A ;

Krückeberg, S ;

Vogel, M ;

Walther, C .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1999, 79 (09) :1343-1352

[25] External accumulation of ions for enhanced electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry [J].

Senko, MW ;

Hendrickson, CL ;

Emmett, MR ;

Shi, SDH ;

Marshall, AG .

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 1997, 8 (09) :970-976

[26] Dissociation lifetimes of alkali halide dianions [J].

Sommerfeld, T ;

Child, MS .

JOURNAL OF CHEMICAL PHYSICS, 1999, 110 (12) :5670-5676

[27]

SOMMERFELD T, COMMUNICATION

[28] Observation of multiply charged cluster anions upon pulsed UV laser ablation of metal surfaces under high vacuum [J].

Stoermer, C ;

Friedrich, J ;

Kappes, MM .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2001, 206 (1-2) :63-78

[29] Photo fragmentation of metal clusters stored in a penning trap [J].

Walther, C ;

Becker, S ;

Dietrich, G ;

Kluge, HJ ;

Lindinger, M ;

Lutzenkirchen, K ;

Schweikhard, L ;

Ziegler, J .

ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS, 1996, 38 (01) :51-58

[30] Photodetachment of free hexahalogenometallate doubly charged anions in the gas phase:: [ML6]2-, (M=Re, Os, Ir, Pt; L=Cl and Br) [J].

Wang, XB ;

Wang, LS .

JOURNAL OF CHEMICAL PHYSICS, 1999, 111 (10) :4497-4509

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