Photochemical mer→fac one-way isomerization of phosphorescent material.: Studies by timeresolved spectroscopy for Tris[2-(4′,6′-difluorophenyl)pyridine]iridium(III) in solution

被引：49

作者：

Karatsu, T

Nakamura, T

Yagai, S

Kitamura, A

Yamaguchi, K

Matsushima, Y

Iwata, T

Hori, Y

Hagiwara, T

机构：

[1] Chiba Univ, Fac Engn, Dept Mat Technol, Inage Ku, Chiba 2638522, Japan

[2] Chiba Univ, Analyt Chem, Inage Ku, Chiba 2638522, Japan

[3] Takasgo Int Corp, Cent Res Lab, Hiratsuka, Kanagawa 2540073, Japan

来源：

CHEMISTRY LETTERS | 2003年 / 32卷 / 10期

关键词：

D O I：

10.1246/cl.2003.886

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photochemical characterization is reported for the mer-stereoisomer of fac-tris[2-(4',6'-difluorophenyl)pyridine]iridium(III) (2), which has attracted attention as a electrophosphorescent material. The mer-2 has a much smaller emission-quantum yield and a shorter emission lifetime than those of the fac-isomer. The relation of the photophysical properties of mer-2 and one-way photoisomerization to fac-2 is discussed.

引用

收藏

页码：886 / 887

页数：2

相关论文

共 17 条

[1] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].

Baldo, MA ;

Lamansky, S ;

Burrows, PE ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6

[2] High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer [J].

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

NATURE, 2000, 403 (6771) :750-753

[3] Highly efficient phosphorescent emission from organic electroluminescent devices [J].

Baldo, MA ;

O'Brien, DF ;

You, Y ;

Shoustikov, A ;

Sibley, S ;

Thompson, ME ;

Forrest, SR .

NATURE, 1998, 395 (6698) :151-154

[4] FACIAL TRIS CYCLOMETALATED RH3+ AND IR3+ COMPLEXES - THEIR SYNTHESIS, STRUCTURE, AND OPTICAL SPECTROSCOPIC PROPERTIES [J].

COLOMBO, MG ;

BRUNOLD, TC ;

RIEDENER, T ;

GUDEL, HU ;

FORTSCH, M ;

BURGI, HB .

INORGANIC CHEMISTRY, 1994, 33 (03) :545-550

[5] A NEW SYNTHETIC ROUTE TO THE PREPARATION OF A SERIES OF STRONG PHOTOREDUCING AGENTS - FAC TRIS-ORTHO-METALATED COMPLEXES OF IRIDIUM(III) WITH SUBSTITUTED 2-PHENYLPYRIDINES [J].

DEDEIAN, K ;

DJUROVICH, PI ;

GARCES, FO ;

CARLSON, G ;

WATTS, RJ .

INORGANIC CHEMISTRY, 1991, 30 (08) :1685-1687

[6]

DEMAS JN, 1971, J AM CHEM SOC, V93, P2841, DOI 10.1021/ja00741a003

[7]

DEMAS JN, 1970, J AM CHEM SOC, V92, P7262

[8] New, efficient electroluminescent materials based on organometallic Ir complexes [J].

Grushin, VV ;

Herron, N ;

LeCloux, DD ;

Marshall, WJ ;

Petrov, VA ;

Wang, Y .

CHEMICAL COMMUNICATIONS, 2001, (16) :1494-1495

[9] Rotational isomerization of (E)-(2-anthryl)ethenes.: A consideration -: Why are the s-cis rotamers more stable than the s-trans rotamers in the excited state and less stable in the ground state? [J].

Karatsu, T ;

Itoh, H ;

Yoshikawa, N ;

Kitamura, A ;

Tokumaru, K .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1999, 72 (08) :1837-1849

[10] EXCITED-STATE PROPERTIES OF A TRIPLY ORTHO-METALATED IRIDIUM(III) COMPLEX [J].

KING, KA ;

SPELLANE, PJ ;

WATTS, RJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (05) :1431-1432