A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases

Abstract

The detection of hydrogen sulfide (H2S) and ethanediamine, toxic gases that are emitted from industrial processes, is important for health and safety. An optical sensor, based on the absorption spectrum of tetrakis(4-nitrophenyl)porphyrin (TNPP) immobilized in a Nafion membrane (Nf) and deposited onto an optical waveguide glass slide, has been developed for the detection of these gases. Responses to analytes were compared for sensors modified with TNPP and Nf-TNPP composites. Among them, Nf-TNPP exhibited significant responses to H2S and ethanediamine. The analytical performance characteristics of the Nf-TNPP-modified sensor were investigated and the response mechanism is discussed in detail. The sensor exhibited excellent reproducibilities, reversibilities, and selectivities, with detection limits for H2S and ethanediamine of 1 and 10 ppb, respectively, and it is a promising candidate for use in industrial sensing applications.

Correction: Gulimire Tuerdi, Nuerguli Kari, Yin Yan, Patima Nizamidin and Abliz Yimit *. A Functionalized Tetrakis(4-Nitrophenyl)Porphyrin Film Optical Waveguide Sensor for Detection of H2S and Ethanediamine Gases. Sensors 2017, 17, 2717

“…Our understanding at that time was to determine the total number of hydrogen atoms of the compound according to the ratio of the number of spectral areas. Consequently, the authors wish to at this time make the following corrections to the paper: 1 Figure S1); this result is in good agreement with previous reports [42,43]. In order to further characterize the purity of the material, we carried out an elemental analysis measurement.…”

“…The obtained responses showed that the reversibility of the sensing film was affected by interfered gases (Supplementary Materials Figure S7). The complete recovery of the sensing film could not be achieved and the baseline also varied" (page 11, lines 5-14 in our paper published in Sensors [1]).…”

“…The authors wish to make the following corrections to this paper [1]: 1. The authors are sorry to report that some of the 1 H NMR data reported in their recently published paper [1] were incorrect.…”

“…The authors wish to make the following corrections to this paper [1]: 1. The authors are sorry to report that some of the 1 H NMR data reported in their recently published paper [1] were incorrect. Our understanding at that time was to determine the total number of hydrogen atoms of the compound according to the ratio of the number of spectral areas.…”

“…2. There are two mistakes in this article [1]. The drying process, "The composite film was heat-treated at 80 • C for 10 min to allow desorption of solvents trapped on the film surface, and then it was dried in a vacuum oven for 24 h at room temperature" was missing on page 3, lines 27 and 28.…”