Article ID Journal Published Year Pages File Type
1236530 Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2011 7 Pages PDF
Abstract

In this paper, we report the synthesis, crystal structure, photophysical properties, and electronic nature of a phosphorescent Cu(I) complex of [Cu(Phen-Np)(POP)]BF4, where Phen-Np and POP stand for 2-(naphthalen-1-yl)-1H-imidazo[4,5-f][1,10]phenanthroline and bis(2-(diphenylphosphanyl)phenyl) ether, respectively. [Cu(Phen-Np)(POP)]BF4 renders a yellow phosphorescence peaking at 545 nm, with a long excited state lifetime of 4.69 μs. Density functional calculation reveals that the emission comes from a triplet metal-to-ligand-charge-transfer excited state. We electrospun composite nanofibers of [Cu(Phen-Np)(POP)]BF4 and polystyrene (PS), hoping to explore the possibility of using the composite nanofibers as an oxygen sensing material. The finally obtained samples with average diameter of ∼300 nm exhibit a maximum sensitivity of 7.2 towards molecular oxygen with short response time of 7 s due to the large surface-area-to-volume ratio of nanofibrous membranes. No photobleaching is detected in these samples.

Graphical abstractA phosphorescent Cu(I) complex is doped into a polymer matrix, and its elementary application for oxygen-sensing application is also investigated. Experimental data suggest that the nanofibrous membranes exhibit a highest sensitivity of 7.2 towards oxygen with a good linear relationship.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A phosphorescent Cu(I) complex is synthesized and studied. ► It is a yellow emitter with long excited state lifetime of 4.69 μs. ► It is doped into a polymer matrix to investigate its sensing behavior to O2. ► A maximum sensitivity of 7.2 with response time of 7 s is realized.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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