Unusual enlargment of magnetic interactions in the lowest excited states of nitroxide radical chromium(III) complexes as revealed by magnetic circular dichroism and luminescence

被引：11

作者：

Tsukahara, Y

Nakata, H

Kaizaki, S ^{[1
]}

机构：

[1] Osaka Univ, Dept Chem, Toyonaka, Osaka 5600043, Japan

[2] Osaka Univ, Dept Phys, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

来源：

INORGANIC CHEMISTRY | 2004年 / 43卷 / 14期

关键词：

D O I：

10.1021/ic035226s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Magnetic circular dichroism and NIR luminescence of nitroxide radical complexes, [Cir(III)(beta-diketonato)(2)(NIT2py or IM2py)]PF6, demonstrate that the energy gaps between the singlet (L-1(D)) and triplet (L-3(D)) spin coupled levels in the lowest excited E-2(g),T-2(1g) states are much larger than those in the ground state. This is the first observation of magnetic interactions in the excited states of radical complexes, which could be elucidated in terms of the exchange mechanism.

引用

页码：4383 / 4386

页数：4

共 26 条

[1] Solid-state absorption and luminescence spectroscopy of nitronyl nitroxide radicals
Beaulac, R
Bussière, G
Reber, C
Lescop, C
Luneau, D
[J]. NEW JOURNAL OF CHEMISTRY, 2003, 27 (08) : 1200 - 1206
[2] GADOLINIUM(III) COMPLEXES WITH PYRIDINE-SUBSTITUTED NITRONYL NITROXIDE RADICALS
BENELLI, C
CANESCHI, A
GATTESCHI, D
PARDI, L
[J]. INORGANIC CHEMISTRY, 1992, 31 (05) : 741 - 746
[3] Theoretical models of exchange interactions in dimeric transition-metal complexes
Ceulemans, A
Chibotaru, LF
Heylen, GA
Pierloot, K
Vanquickenborne, LG
[J]. CHEMICAL REVIEWS, 2000, 100 (02) : 787 - 806
[4] 1D manganese(II) derivatives of an imidazole-substituted nitronyl nitroxide. An approach toward molecular magnetic materials of high dimensionality
Fegy, K
Luneau, D
Belorizky, E
Novac, M
Tholence, JL
Paulsen, C
Ohm, T
Rey, P
[J]. INORGANIC CHEMISTRY, 1998, 37 (18) : 4524 - 4532
[5] Crystal structures and magnetic properties of metal complexes bearing four nitronyl nitroxide moieties in the same coordination sphere
Francese, G
Romero, FM
Neels, A
Stoeckli-Evans, H
Decurtins, S
[J]. INORGANIC CHEMISTRY, 2000, 39 (10) : 2087 - 2095
[6] Spectroscopic implications for magnetic interactions in metal complexes with nitroxide radicals
Kaizaki, S
[J]. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2003, 76 (04) : 673 - 688
[7] KANDA H, IN PRESS INORG CHIM
[8] Ligand-centered near-infrared luminescence from lanthanide complexes with chelating nitronyl nitroxide free radicals
Lescop, C
Luneau, D
Bussiére, G
Triest, H
Reber, C
[J]. INORGANIC CHEMISTRY, 2000, 39 (17) : 3740 - +
[9] Synthesis, structures, and magnetic and optical properties of a series of europium(III) and gadolinium(III) complexes with chelating nitronyl and imino nitroxide free radicals
Lescop, C
Luneau, D
Rey, P
Bussière, G
Reber, C
[J]. INORGANIC CHEMISTRY, 2002, 41 (21) : 5566 - 5574
[10] TRANSITION-METAL DERIVATIVES OF A CHELATING NITRONYL NITROXIDE LIGAND - NICKEL(II) AND MANGANESE(II) COMPLEXES
LUNEAU, D
RISOAN, G
REY, P
GRAND, A
CANESCHI, A
GATTESCHI, D
LAUGIER, J
[J]. INORGANIC CHEMISTRY, 1993, 32 (24) : 5616 - 5622

← 1 2 3 →