| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1229182 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2015 | 8 Pages |
•A green-emitting Cu(I) complex was reported for oxygen sensing purpose.•π–π attraction within complex molecules was eliminated to favor O2 sensing.•Sensing composite was constructed using MCM-41 as supporting matrix.•Short response time of 10 s and sensitivity of 5.56 were obtained.
In the present work, a green-emitting Cu(I) complex [Cu(BT-Et)(POP)]BF4 was synthesized and fully characterized, where BT-Et = 4-(1-ethyl-1H-benzo[d]imidazol-2-yl)thiazole, POP = bis(2-(diphenylphosphanyl)phenyl) ether, respectively. An ethyl group was connected onto the diamine ligand to breach π–π attraction within solid [Cu(BT-Et)(POP)]BF4, favoring O2 molecule attack and sensitivity improvement. Its molecular identity was confirmed by single crystal analysis and theoretical calculation. [Cu(BT-Et)(POP)]BF4 emitted long-lived green emission peaking at 521 nm upon photoexcitation which was vulnerable towards O2 molecule, making itself a potential oxygen sensing material. [Cu(BT-Et)(POP)]BF4 was then doped into a silica supporting matrix MCM-41. The resulting composite samples showed sensing behavior towards O2 molecule, with short response time of 10 s and sensitivity of 5.56.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
