An Ammonia Sensor Using an Unadorned Bromocresol Layer

Caoimhe Ní Néill; Merve Akdağ; Anthony J. Betts; John F. Cassidy

doi:10.1080/03067319.2020.1807975

An Ammonia Sensor Using an Unadorned Bromocresol Layer

Caoimhe Ní Néill, Merve Akdağ, Anthony J. Betts, John F. Cassidy

Research output: Contribution to journal › Article › peer-review

Abstract

Bromocresol Purple,(BCP) cast onto an acetate sheet, was used to sense ammonia. This simple layer responded reversibly to a low concentration (15 ppm) of ammonia in the presence of water vapour. The BCP solution was spincoated on an acetate sheet from a solution in dichloromethane. This layer was exposed to nitrogen and NH₃/H₂O vapour in quick succession. The colour change occurred from yellow to purple rapidly in the solid state. The λ_max for the neutral (acid) form of the BCP was found to be 435 nm and the λ_max for the dianion (base form) of the BCP was found to be 610 nm A mechanism previously predicted theoretically was confirmed using FTIR identifying the presence of a peak associated with a carbonyl in the dianion form.

Original language	English
Pages (from-to)	6321-6328
Number of pages	8
Journal	International Journal of Environmental Analytical Chemistry
Volume	102
Issue number	18
DOIs	https://doi.org/10.1080/03067319.2020.1807975
Publication status	Published - 2022

Keywords

Ammonia sensor
acetate sheet
bromocresol purple
colorimetric sensor

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1080/03067319.2020.1807975

https://arrow.tudublin.ie/scschcpsart/101Licence: CC BY-NC-SA

Cite this

@article{caad2103da8d47e1ac268cfa59498b24,

title = "An Ammonia Sensor Using an Unadorned Bromocresol Layer",

abstract = "Bromocresol Purple,(BCP) cast onto an acetate sheet, was used to sense ammonia. This simple layer responded reversibly to a low concentration (15 ppm) of ammonia in the presence of water vapour. The BCP solution was spincoated on an acetate sheet from a solution in dichloromethane. This layer was exposed to nitrogen and NH3/H2O vapour in quick succession. The colour change occurred from yellow to purple rapidly in the solid state. The λmax for the neutral (acid) form of the BCP was found to be 435 nm and the λmax for the dianion (base form) of the BCP was found to be 610 nm A mechanism previously predicted theoretically was confirmed using FTIR identifying the presence of a peak associated with a carbonyl in the dianion form.",

keywords = "Ammonia sensor, acetate sheet, bromocresol purple, colorimetric sensor",

author = "\{N{\'i} N{\'e}ill\}, Caoimhe and Merve Akdağ and Betts, \{Anthony J.\} and Cassidy, \{John F.\}",

note = "Publisher Copyright: {\textcopyright} 2020 Informa UK Limited, trading as Taylor \& Francis Group.",

year = "2022",

doi = "10.1080/03067319.2020.1807975",

language = "English",

volume = "102",

pages = "6321--6328",

journal = "International Journal of Environmental Analytical Chemistry",

issn = "0306-7319",

publisher = "Taylor and Francis Ltd.",

number = "18",

}

TY - JOUR

T1 - An Ammonia Sensor Using an Unadorned Bromocresol Layer

AU - Ní Néill, Caoimhe

AU - Akdağ, Merve

AU - Betts, Anthony J.

AU - Cassidy, John F.

PY - 2022

Y1 - 2022

N2 - Bromocresol Purple,(BCP) cast onto an acetate sheet, was used to sense ammonia. This simple layer responded reversibly to a low concentration (15 ppm) of ammonia in the presence of water vapour. The BCP solution was spincoated on an acetate sheet from a solution in dichloromethane. This layer was exposed to nitrogen and NH3/H2O vapour in quick succession. The colour change occurred from yellow to purple rapidly in the solid state. The λmax for the neutral (acid) form of the BCP was found to be 435 nm and the λmax for the dianion (base form) of the BCP was found to be 610 nm A mechanism previously predicted theoretically was confirmed using FTIR identifying the presence of a peak associated with a carbonyl in the dianion form.

AB - Bromocresol Purple,(BCP) cast onto an acetate sheet, was used to sense ammonia. This simple layer responded reversibly to a low concentration (15 ppm) of ammonia in the presence of water vapour. The BCP solution was spincoated on an acetate sheet from a solution in dichloromethane. This layer was exposed to nitrogen and NH3/H2O vapour in quick succession. The colour change occurred from yellow to purple rapidly in the solid state. The λmax for the neutral (acid) form of the BCP was found to be 435 nm and the λmax for the dianion (base form) of the BCP was found to be 610 nm A mechanism previously predicted theoretically was confirmed using FTIR identifying the presence of a peak associated with a carbonyl in the dianion form.

KW - Ammonia sensor

KW - acetate sheet

KW - bromocresol purple

KW - colorimetric sensor

UR - https://www.scopus.com/pages/publications/85089471536

U2 - 10.1080/03067319.2020.1807975

DO - 10.1080/03067319.2020.1807975

M3 - Article

AN - SCOPUS:85089471536

SN - 0306-7319

VL - 102

SP - 6321

EP - 6328

JO - International Journal of Environmental Analytical Chemistry

JF - International Journal of Environmental Analytical Chemistry

IS - 18

ER -

An Ammonia Sensor Using an Unadorned Bromocresol Layer

Abstract

Keywords

UN SDGs

Access to Document

Fingerprint

Cite this