Ratiometric chemodosimeter: an organic-nanofiber platform for sensing lethal phosgene gasElectronic supplementary information (ESI) available. See DOI: 10.1039/c8ta10481f
Herein, we report the fabrication of organic nanofibrils, using electrospun 3-oxime-4-hydroxy-1,8-naphthalic- n -butylimide ( R1 )-doped polycaprolactone (PCL), for application as a gaseous phosgene-specific sensing device. The phosgene-mediated adsorption of the nanofibers gives rise to an observab...
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Language | English |
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Abstract | Herein, we report the fabrication of organic nanofibrils, using electrospun 3-oxime-4-hydroxy-1,8-naphthalic-
n
-butylimide (
R1
)-doped polycaprolactone (PCL), for application as a gaseous phosgene-specific sensing device. The phosgene-mediated adsorption of the nanofibers gives rise to an observable colorimetric switch from brown-red to pale greenish-yellow and a synchronized ratiometric spectral emission with significantly high Stokes shift. The high surface to volume ratio and innovative properties of the nanofiber mats lead to the diminution of response time in comparison to the composite film of the same materials. Proficient gas penetration allows a fast chemical reaction, which is proportional to the phosgene concentration and delivers a very low detection limit of 0.087 ppm. To the best of our knowledge, this is the lowest limit of detection of gaseous phosgene for any robust protocol to date. Confocal fluorescence imaging and scanning electron microscopy (SEM) studies revealed partial deformation on the surface of the nanomaterials upon the adsorption of phosgene, indicating the phosgene-mediated chemical transformation. The fluorescent naphthalic-oxime with an elevated specific surface area of nanofibrous polymeric supports proffers fast optical and visual phosgene detection for industrial and environment application. Importantly, the LOD of gaseous phosgene in all solid protocols used is far lower than the safe phosgene concentration levels for human exposure.
The fabrication of organic nanofibrils using 3-oxime-4-hydroxy-1,8-naphthalic-
n
-butylimide (R1)-doped polycaprolactone (PCL) electrospun, which is developed as a gaseous phosgene-specific sensing device. |
---|---|
AbstractList | Herein, we report the fabrication of organic nanofibrils, using electrospun 3-oxime-4-hydroxy-1,8-naphthalic-
n
-butylimide (
R1
)-doped polycaprolactone (PCL), for application as a gaseous phosgene-specific sensing device. The phosgene-mediated adsorption of the nanofibers gives rise to an observable colorimetric switch from brown-red to pale greenish-yellow and a synchronized ratiometric spectral emission with significantly high Stokes shift. The high surface to volume ratio and innovative properties of the nanofiber mats lead to the diminution of response time in comparison to the composite film of the same materials. Proficient gas penetration allows a fast chemical reaction, which is proportional to the phosgene concentration and delivers a very low detection limit of 0.087 ppm. To the best of our knowledge, this is the lowest limit of detection of gaseous phosgene for any robust protocol to date. Confocal fluorescence imaging and scanning electron microscopy (SEM) studies revealed partial deformation on the surface of the nanomaterials upon the adsorption of phosgene, indicating the phosgene-mediated chemical transformation. The fluorescent naphthalic-oxime with an elevated specific surface area of nanofibrous polymeric supports proffers fast optical and visual phosgene detection for industrial and environment application. Importantly, the LOD of gaseous phosgene in all solid protocols used is far lower than the safe phosgene concentration levels for human exposure.
The fabrication of organic nanofibrils using 3-oxime-4-hydroxy-1,8-naphthalic-
n
-butylimide (R1)-doped polycaprolactone (PCL) electrospun, which is developed as a gaseous phosgene-specific sensing device. |
Author | Maiti, Rituparna Maiti, Dilip K Maiti, Kalipada Ghosh, Debasish Datta, Pallab Mandal, Debabrata Vyas, Veena |
AuthorAffiliation | Department of Chemistry Indian Institute of Engineering Science and Technology Department of Health Care Science University College of Science University of Calcutta |
AuthorAffiliation_xml | – name: University College of Science – name: Department of Chemistry – name: Indian Institute of Engineering Science and Technology – name: University of Calcutta – name: Department of Health Care Science |
Author_xml | – sequence: 1 givenname: Kalipada surname: Maiti fullname: Maiti, Kalipada – sequence: 2 givenname: Debasish surname: Ghosh fullname: Ghosh, Debasish – sequence: 3 givenname: Rituparna surname: Maiti fullname: Maiti, Rituparna – sequence: 4 givenname: Veena surname: Vyas fullname: Vyas, Veena – sequence: 5 givenname: Pallab surname: Datta fullname: Datta, Pallab – sequence: 6 givenname: Debabrata surname: Mandal fullname: Mandal, Debabrata – sequence: 7 givenname: Dilip K surname: Maiti fullname: Maiti, Dilip K |
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n
-butylimide (
R1
)-doped polycaprolactone... |
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Title | Ratiometric chemodosimeter: an organic-nanofiber platform for sensing lethal phosgene gasElectronic supplementary information (ESI) available. See DOI: 10.1039/c8ta10481f |
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