Optical oxygen sensing materials based on a novel dirhenium(I) complex assembled in mesoporous silica
Document Type
Article
Publication Date
4-1-2011
Abstract
A new dirhenium(I) complex fac-[{Re(CO)3(4,7-dinonadecyl-1,10- phenanthro -line)}2 (4,4′-bipyridyl)] (trifluoromethanesulfonate)2 (denoted as D-Re(I) ) is assembled in MCM-41 and SBA-15 type mesoporous silica support. The emission peaks of D-Re(I) in D-Re(I)/MCM-41 and D-Re(I)/SBA-15 are observed at 522 and 517 nm, respectively. Their long excited lifetimes, which are of the order of microseconds, indicate the presence of phosphorescence emission arising from the metal to ligand charge-transfer (MLCT) transition. The luminescence intensities of D-Re(I)/MCM-41 and D-Re(I)/SBA-15 decrease remarkably with increase in the oxygen concentration, meaning that they can be used as optical oxygen sensing materials based on luminescence quenching. The ratios I0/I 100 of D-Re(I)/MCM-41 and D-Re(I)/SBA-15 are estimated to be 5.6 and 20.1, respectively. The obtained SternVolmer oxygen quenching plots of the mesoporous sensing materials could be fitted well to the two-site Demas model and Lehrer model. © 2010 Elsevier B.V.
Publication Source (Journal or Book title)
Journal of Luminescence
First Page
781
Last Page
785
Recommended Citation
Liu, Y., Li, B., Cong, Y., Zhang, L., Fan, D., & Shi, L. (2011). Optical oxygen sensing materials based on a novel dirhenium(I) complex assembled in mesoporous silica. Journal of Luminescence, 131 (4), 781-785. https://doi.org/10.1016/j.jlumin.2010.12.003