TY - JOUR
T1 - Solid state sensor based on meso-tetra (p-nitrophenyl) porphyrin deposited glass plate for the determination of trace level HCl gas
AU - Gowthaman, N. S.K.
AU - Palanisamy, Muthukumar
AU - Kanthapazham, Rajakumar
N1 - Publisher Copyright:
© 2019 World Research Association. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019/9
Y1 - 2019/9
N2 - A novel solid-state sensor based on meso-tetra (pnitrophenyl) porphyrin (MTNP) deposited glass plate for the detection of HCl gas was developed and described in this study. Initially, the MTNP molecule was synthesized by Lindsey method and characterized by UV-vis and FT-IR spectroscopic techniques. Addition of HCl into the MTNP-DMF solution leads to the protonation of MTNP which is evidenced from the colour change from dark brown to fluorescent green and it was followed by absorption and fluorescence spectral techniques. Protonation of MTNP leads to changes in Soret and Q bands of the porphyrin. Interestingly, deprotonation on MTNP occurs by the addition of trimethylamine into the same solution and the solution turns into its origin. Further, detection of HCl gas using MTNP deposited glass plate (solid state sensor) was demonstrated. The solid-state sensor was characterized by UV-vis, fluorescence and scanning electron microscopy (SEM). The SEM image shows discrete aggregates after the solid-state sensor was exposed to HCl gas. Detection of HCl gas monitored at 464 nm and the sensitivity of the solid-state sensor were achieved up to 30 ppm. The sensor fails to detect below 5 ppm of the HCl gas and is also slightly affected by humidity.
AB - A novel solid-state sensor based on meso-tetra (pnitrophenyl) porphyrin (MTNP) deposited glass plate for the detection of HCl gas was developed and described in this study. Initially, the MTNP molecule was synthesized by Lindsey method and characterized by UV-vis and FT-IR spectroscopic techniques. Addition of HCl into the MTNP-DMF solution leads to the protonation of MTNP which is evidenced from the colour change from dark brown to fluorescent green and it was followed by absorption and fluorescence spectral techniques. Protonation of MTNP leads to changes in Soret and Q bands of the porphyrin. Interestingly, deprotonation on MTNP occurs by the addition of trimethylamine into the same solution and the solution turns into its origin. Further, detection of HCl gas using MTNP deposited glass plate (solid state sensor) was demonstrated. The solid-state sensor was characterized by UV-vis, fluorescence and scanning electron microscopy (SEM). The SEM image shows discrete aggregates after the solid-state sensor was exposed to HCl gas. Detection of HCl gas monitored at 464 nm and the sensitivity of the solid-state sensor were achieved up to 30 ppm. The sensor fails to detect below 5 ppm of the HCl gas and is also slightly affected by humidity.
KW - Detection of HCl gas
KW - Lindsey method
KW - Meso-tetra(p-nitrophenyl) porphyrin
KW - Protonation and deprotonation
KW - Solid state sensor
UR - http://www.scopus.com/inward/record.url?scp=85081227908&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85081227908
VL - 23
SP - 47
EP - 52
JO - Research Journal of Chemistry and Environment
JF - Research Journal of Chemistry and Environment
SN - 0972-0626
IS - 9
ER -