Manipulation of pH induced sensitivity of a fluorescent probe in presence of silver nanoparticles

In this study, pH induced spectral response of the newly synthesized carbazole derivative (9-butyl-bis-3-(4-(dimethylamino) phenyl) allylidene)-9H-carbazole-3,6-diamine) has been declared. We utilized silver nanoparticles (AgNPs) along with ionic liquid as additives for manipulation of the spectral...

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Bibliographic Details
Published in:Journal of luminescence 2015-12, Vol.168, p.228-235
Main Authors: Kacmaz, Sibel, Ertekin, Kadriye, Oter, Ozlem, Hizliateş, Cevher Gundogdu, Ergun, Yavuz, Celik, Erdal
Format: Article
Language:English
Subjects:
Electrospinning
Fluorescence
Ionic liquid
Optical pH sensor
Silver nanoparticles
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Summary:In this study, pH induced spectral response of the newly synthesized carbazole derivative (9-butyl-bis-3-(4-(dimethylamino) phenyl) allylidene)-9H-carbazole-3,6-diamine) has been declared. We utilized silver nanoparticles (AgNPs) along with ionic liquid as additives for manipulation of the spectral response. Plasticized ethyl cellulose (EC) was used as matrix material. Fibers and porous films were produced by electrospinning technique. The emission intensity at 631nm has been followed as the analytical signal. Utilization of silver nanoparticles in electrospun polymeric fibers for pH sensing purposes resulted with many advantages such as tuned sensitivity, linear calibration plot for larger pH ranges, increased surface area and enhancement in all sensor dynamics. Additionally, we performed manipulation of the pKa within the same matrix exploiting the silver NPs. Characteristics of the pH induced response for the offered composition was superior with respect to the previously reported ones. When stored at the ambient air of the laboratory there was no significant drift in the signal intensity after 16 months. Our sensitivity and stability tests are still in progress. •A carbozole derivative was used for the first time for sensing of pH along with silver nanoparticles.•The sensor slides fabricated in form of nanofibers.•The Ag containing and Ag-free slides were produced by electrospinning technique.•pH Sensitivity of the dye was compared for both; Ag containing and Ag-free forms.•We performed manipulation of the pKa within the same matrix exploiting the silver NPs.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2015.07.056