PMID- 15732973
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20050517
LR  - 20050228
IS  - 0020-1669 (Print)
IS  - 0020-1669 (Linking)
VI  - 44
IP  - 5
DP  - 2005 Mar 7
TI  - Blue luminescent 2-(2'-pyridyl)benzimidazole derivative ligands and their orange 
      luminescent mononuclear and polynuclear organoplatinum(II) complexes.
PG  - 1332-43
AB  - Five new 2-(2'-pyridyl)benzimidazole derivative ligands, 
      1,4-bis[2-(2'-pyridyl)benzimidazolyl]benzene (1,4-bmb), 
      4,4'-bis[2-(2'-pyridyl)benzimidazolyl]biphenyl (bmbp), 
      1-bromo-4-[2-(2'-pyridyl)benzimidazolyl]benzene (Brmb), 
      1,3-bis[2-(2'-pyridyl)benzimidazolyl]benzene (1,3-bmb), and 
      1,3,5-tris[2-(2'-pyridyl)benzimidazolyl]benzene (tmb), have been synthesized by 
      Ullmann condensation methods. The corresponding mononuclear and polynuclear PtII 
      complexes, Pt2(1,4-bmb)Ph4 (1), Pt2(bmbp)Ph4 (2), Pt(Brmb)Ph2 (3), 
      Pt2(1,3-bmb)Ph4 (4), and Pt3(tmb)Ph6 (5), have been obtained by the reaction of 
      the appropriate ligand with [PtPh2(SMe2)]n. The structures of the free ligands 
      1,4-bmb, bmbp, and tmb, as well as the complexes 1-3, were determined by 
      single-crystal X-ray diffraction. All ligands display fluorescent emissions in 
      the purple/blue region of the spectrum at ambient temperature and phosphorescent 
      emissions in the blue/green region at 77 K, which are attributable to 
      ligand-centered pi --> pi* transition. No ligand-based emission was observed for 
      the PtII complexes 1-5. All PtII complexes display orange/red emissions at 77 K 
      in a frozen solution or in the solid state, attributable to metal-to-ligand 
      charge transfers (MLCT). Variable-temperature 1H NMR experiments establish that 
      complexes 1, 4, and 5 exist in isomeric forms in solution at ambient temperature 
      due to the hindered rotation of the square PtC2N2 planes in the complexes.
FAU - Liu, Qin-De
AU  - Liu QD
AD  - Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.
FAU - Jia, Wen-Li
AU  - Jia WL
FAU - Wang, Suning
AU  - Wang S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Inorg Chem
JT  - Inorganic chemistry
JID - 0366543
EDAT- 2005/03/01 09:00
MHDA- 2005/03/01 09:01
CRDT- 2005/03/01 09:00
PHST- 2005/03/01 09:00 [pubmed]
PHST- 2005/03/01 09:01 [medline]
PHST- 2005/03/01 09:00 [entrez]
AID - 10.1021/ic0487530 [doi]
PST - ppublish
SO  - Inorg Chem. 2005 Mar 7;44(5):1332-43. doi: 10.1021/ic0487530.