Metal Complexes of Pincer Ligands: Excited States, Photochemistry, and Luminescence

被引:43
作者
Freeman, Gemma R. [1 ]
Williams, J. A. Gareth [1 ]
机构
[1] Univ Durham, Dept Chem, Durham DH1 3LE, England
来源
ORGANOMETALLIC PINCER CHEMISTRY | 2013年 / 40卷
关键词
Cyclometallated complex; Electroluminescence; Imaging; Iridium; OLED; Phosphorescence; Platinum; Ruthenium; Sensing; CYCLOMETALATED PLATINUM(II) COMPLEXES; PHOTOPHYSICAL PROPERTIES; IRIDIUM(III) COMPLEXES; COORDINATION-COMPOUNDS; NCN-PINCER; PT-II; EXCIMER PHOSPHORESCENCE; ELECTRONIC-PROPERTIES; REVERSIBLE BINDING; BRIDGING LIGANDS;
D O I
10.1007/978-3-642-31081-2_4
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Pincer ligands of the form ECE that incorporate N-heterocyclic lateral units, E, are terdentate analogues of NC-cyclometallating ligands such as 2-phenylpyridine. They are able to form a variety of highly luminescent complexes with platinum(II) and iridium(III). They can also be thought of as cyclometallating analogues of the NNN-coordinating ligand terpyridine. The introduction of the carbon atom can impart significant changes on the nature and energy of the electronic excited states, as is evident for complexes of ruthenium(II), where a shift in the absorption to low energy in the metallated systems has sparked interest in applications for dye-sensitised solar cells. Investigations in these areas over the past decade are reviewed. We also consider related complexes in which the lateral coordinating units are aliphatic N donors, phosphines, or sulphur ligands. The lack of good pi-accepting units in such compounds tends to lead to weaker ligand fields and hence to low-energy metal-centred states. These states dictate much of the excited-state chemistry and compromise the efficiency of luminescence at room temperature.
引用
收藏
页码:89 / 129
页数:41
相关论文
共 107 条
[1]   A 3.0 μs room temperature excited state lifetime of a bistridentate RuII-polypyridine complex for rod-like molecular arrays [J].
Abrahamsson, Maria ;
Jager, Michael ;
Osterman, Tomas ;
Eriksson, Lars ;
Persson, Petter ;
Becker, Hans-Christian ;
Johansson, Olof ;
Hammarstrom, Leif .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (39) :12616-12617
[2]   Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].
Adachi, C ;
Baldo, MA ;
Thompson, ME ;
Forrest, SR .
JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051
[3]   High efficiency single dopant white electrophosphorescent light emitting diodes [J].
Adamovich, V ;
Brooks, J ;
Tamayo, A ;
Alexander, AM ;
Djurovich, PI ;
D'Andrade, BW ;
Adachi, C ;
Forrest, SR ;
Thompson, ME .
NEW JOURNAL OF CHEMISTRY, 2002, 26 (09) :1171-1178
[4]   Organoplatinum crystals for gas-triggered switches [J].
Albrecht, M ;
Lutz, M ;
Spek, AL ;
van Koten, G .
NATURE, 2000, 406 (6799) :970-974
[5]  
Albrecht M, 1999, ADV MATER, V11, P171, DOI 10.1002/(SICI)1521-4095(199902)11:2<171::AID-ADMA171>3.0.CO
[6]  
2-F
[7]  
Albrecht M, 2000, CHEM-EUR J, V6, P1431, DOI 10.1002/(SICI)1521-3765(20000417)6:8<1431::AID-CHEM1431>3.3.CO
[8]  
2-4
[9]   RADIATIONLESS DECAY IN RHODIUM(I) AND IRIDIUM(I) COMPLEXES - POLARIZATION AND SOLVENT RELAXATION STUDIES [J].
ANDREWS, LJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1979, 83 (25) :3203-3209
[10]  
[Anonymous], 1962, PURE APPL CHEM, DOI DOI 10.1351/PAC196511030371