Novel phosphorescent cyclometalated organotin(IV) and organolead(IV) complexes of 2,6-bis(2′-indolyl)pyridine and 2,6-bis[2′-(7-azaindolyl)]pyridine

Wen Li Jia, Qin De Liu, Ruiyao Wang, Suning Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Four novel five-coordinated Sn(IV) and Pb(IV) complexes of 2,6-bis(2′-indolyl)pyridine (H2-bip) and 2,6-bis[2′-(7-azaindolyl)]pyridine (H2bap) were synthesized. These four complexes have the formulas Sn(bip)Ph2 (1), Sn(bap)Ph2 (2), Pb(bip)Ph2 (3), and Pb(bap)Ph2 (4), respectively. The structures were determined by single-crystal X-ray diffraction. In the complexes, the metal centers are tridentately chelated by the bip or the bap ligand and further coordinated by two phenyl groups, resulting in a distorted-trigonal-bipyramidal geometry. These complexes display interesting extended π-π stack structures in the solid state. Complexes 1 and 2 are luminescent at room temperature in solution and the solid state. At 77 K in THF solution, all four complexes display both blue-green fluorescent and orange-red phosphorescent emissions, which originate from ligand-centered π → π* transitions. The Sn(IV) and Pb(IV) centers play a key role in enhancing phosphorescent emission of the bip and bap ligands.

Original languageEnglish
Pages (from-to)4070-4078
Number of pages9
JournalOrganometallics
Volume22
Issue number20
DOIs
Publication statusPublished - 29 Sept 2003
Externally publishedYes

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