Magnetic field dependent picosecond intersystem crossing. The role of molecular symmetry

被引：6

作者：

Gilch, P

Musewald, C

Michel-Beyerle, ME

机构：

[1] Univ Munich, Sekt Phys, D-80538 Munich, Germany

[2] Tech Univ Munich, Inst Theoret & Phys Chem, D-85747 Garching, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 325卷 / 1-3期

关键词：

D O I：

10.1016/S0009-2614(00)00677-1

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：

The magnetic field effects on the picosecond photo-dynamics of two different nickel(II) centered tetrapyrroles dissolved in coordinating solvents are compared. These compounds exhibit fast intersystem crossing processes with multi-exponential kinetics which are altered by external magnetic fields of some teslas. The influence of molecular symmetry on the magnitude of the field effect is investigated and treated semi-quantitatively using a stochastic Liouville approach. Modelling of the effect allows to estimate the zero-field splitting of very short-lived triplet states. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：39 / 45

页数：7

共 11 条

[1] Ultrafast vibrational relaxation and ligand photodissociation/photoassociation processes of nickel(II) porphyrins in the condensed phase
Eom, HS
Jeoung, SC
Kim, D
Ha, JH
Kim, YR
[J]. JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (20) : 3661 - 3669
[2] Ultrafast electron transfer, recombination and spin dynamics
Gilch, P
PollingerDammer, F
Steiner, UE
MichelBeyerle, ME
[J]. CHEMICAL PHYSICS LETTERS, 1997, 275 (3-4) : 339 - 348
[3] Hoff A. J, 1989, ADV EPR APPL BIOL BI
[4] LAMAR GN, 1979, PORPHYRINS, V4, P61, DOI DOI 10.1016/B978-0-12-220104-2.50009-0
[5] Mabbs F.E., 1992, ELECT PARAMAGNETIC R
[6] Magnetic field dependence of ultrafast intersystem-crossing:: A triplet mechanism on the picosecond time scale?
Musewald, C
Gilch, P
Hartwich, G
Pöllinger-Dammer, F
Scheer, H
Michel-Beyerle, ME
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (38) : 8876 - 8881
[7] Zero-field splitting in the triplet ground state of nickelocene
Prins, R.
Van Voorst, J. D. W.
Schinkel, C. J.
[J]. CHEMICAL PHYSICS LETTERS, 1967, 1 (02) : 54 - 55
[8] ULTRAFAST PHOTODISSOCIATION OF A METALLOPORPHYRIN IN THE CONDENSED PHASE
RODRIGUEZ, J
HOLTEN, D
[J]. JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (10) : 5944 - 5950
[9] A TRIPLET MECHANISM FOR MAGNETIC-FIELD MODULATION OF PHOTOCHEMICAL QUANTUM YIELDS
STEINER, U
[J]. BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1981, 85 (03): : 228 - 233
[10] MAGNETIC-FIELD EFFECTS IN CHEMICAL-KINETICS AND RELATED PHENOMENA
STEINER, UE
ULRICH, T
[J]. CHEMICAL REVIEWS, 1989, 89 (01) : 51 - 147

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