A series of Cu1 complexes containing 1,10-phenanthroline derivative ligands: Synthesis, characterization, photophysical, and oxygen-sensing properties

Document Type

Article

Publication Date

1-1-2009

Abstract

Five novel copper(I) complexes with the general formula [Cu(dpephos)(NN)]BF4 {dpephos = bis[2-(diphenylphos- phanyl)phenyl] ether, NN = 2-phenyl-1H-imidazo[4,5-/]- [1,10]phenanthroline (pip, 1), 1-ethyl-2-phenyl-1H-imid- azo[4,5-/][1,10]phenanthroline (epip, 2), 2-(naphthalen-1-yl)- 1H-imMazo[4,5-/][1,10]phenanthroline (nip, 3), 1-ethyl-2- (naphthalen-1-yl)-1H-imidazo[4,5-/][1,10]phenanthroline (enip, 4), 2-(anthracen-9-yl)-1-ethyl-1H-imidazo[4,5-/][1,10]phen- anthroline (aeip, 5)} were rationally designed and synthesized, and these complexes were characterized by 1H NMR and IR spectroscopy and elemental analysis. X-ray crystal- structure analysis of 3 and 4 are also presented. Their photo- physical properties at room temperature were examined by using a combination of cyclic voltammetry and electronic absorption spectroscopy. It was found that 1-4 display broadband emission in the solid state upon excitation at X = 400 nm, and the emission maxima are located in the range 530-558 nm; the excited-state lifetimes of these complexes are 8.24, 1.97, 6.99, and 2.43 |rs, respectively. As a result, the emission intensity of complexes 1-4 is sensitive to oxygen concentration, and they display oxygen-sensing properties after they are encapsulated into mesoporous silica MCM-41 or SBA-15. © Wiley-VCH Verlag GmbH & Co. KGaA.

Publication Source (Journal or Book title)

European Journal of Inorganic Chemistry

First Page

2294

Last Page

2302

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