PMID- 16060621
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20050829
LR  - 20050802
IS  - 0020-1669 (Print)
IS  - 0020-1669 (Linking)
VI  - 44
IP  - 16
DP  - 2005 Aug 8
TI  - New phosphorescent polynuclear Cu(I) compounds based on linear and star-shaped 
      2-(2'-pyridyl)benzimidazolyl derivatives: syntheses, structures, luminescence, 
      and electroluminescence.
PG  - 5706-12
AB  - Four dinuclear and trinuclear Cu(I) complexes that contain 
      2-(2'-pyridyl)benzimidazolyl derivative ligands including 
      1,4-bis[2-(2'-pyridyl)benzimidazolyl]benzene (1,4-bmb), 
      1,3-bis[2-(2'-pyridyl)benzimidazolyl]benzene (1,3-bmb), 
      1,3,5-tris[2-(2'-pyridyl)benzimidazolyl]benzene (tmb), and 
      4,4'-bis[2-(2'-pyridyl)benzimidazolyl]biphenyl (bmbp) have been synthesized. The 
      formulas of these complexes are [Cu(2)(1,4-bmb)(PPh(3))(4)][BF(4)](2) (1), 
      [Cu(2)(1,3-bmb)(PPh(3))(4)][BF(4)](2) (2), [Cu(3)(tmb)(PPh(3))(6)][BF(4)](3) (3), 
      and [Cu(2)(bmbp)(PPh(3))(4)][BF(4)](2) (4), respectively. The crystal structures 
      of 2-4 have been determined by single-crystal X-ray diffraction analyses. The 
      Cu(I) ions in the complexes have a distorted tetrahedral geometry. For 3, two 
      structural isomers (syn and anti) resulted from two different orientations of the 
      three 2-(2'-pyridyl)benzimidazolyl chelating units were observed in the crystal 
      lattice. Variable-temperature (1)H NMR experiments established the presence of 
      syn and anti isomers for 1-3 in solution which interconvert at ambient 
      temperature. Complexes 1-4 have a weak MLCT absorption band in the 350-450 nm 
      region and display a yellow-orange emission when irradiated by UV light. One 
      unexpected finding is that the yellow-orange emission of complexes 1-4 has a very 
      long decay lifetime (approximately 200 micros) at 77 K. An electroluminescent 
      (EL) device using 4 as the emitter and PVK as the host was fabricated. However, 
      the long decay lifetime of the copper complexes may limit their applications as 
      phosphorescent emitters in EL devices.
FAU - Jia, Wen Li
AU  - Jia WL
AD  - Department of Chemistry, Queen's University, Kingston, Ontario, Canada.
FAU - McCormick, Theresa
AU  - McCormick T
FAU - Tao, Ye
AU  - Tao Y
FAU - Lu, Jian-Ping
AU  - Lu JP
FAU - Wang, Suning
AU  - Wang S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Inorg Chem
JT  - Inorganic chemistry
JID - 0366543
EDAT- 2005/08/03 09:00
MHDA- 2005/08/03 09:01
CRDT- 2005/08/03 09:00
PHST- 2005/08/03 09:00 [pubmed]
PHST- 2005/08/03 09:01 [medline]
PHST- 2005/08/03 09:00 [entrez]
AID - 10.1021/ic0504893 [doi]
PST - ppublish
SO  - Inorg Chem. 2005 Aug 8;44(16):5706-12. doi: 10.1021/ic0504893.