Hu et al. reported that 4-chloro-7-nitrobenzo[c]-[ 1, 2, 5] oxadiazole (NBD) based o-phenylenediamine (OPD) group, are colorimetric gas sensing substances which can swiftly And accurately detect phosgene. [245]. however, NBD-OPD phosgene gas sensors produce HCl as by-products which could result in secondary contamination. to overcome this problem, Hu et al. reported a new ring structure material, and they introduced the synthesized sensor 1, a benzimidazole-fused rhodamine dye that can efficaciously detect phosgene gas. they have plotted the possible reaction mechanism among sensor-1 and phosgene in figure 16a. consistent with the 1H NMR spectrum of the product, the products produced after phosgene gas assay showed that it has a structure as indicated through the ring-opened N-shloroformyl -benzimadazle 2. Senor-1, with a nanofiber platform, showed color alternate and fluorescence upon exposure to phosgene gas. As shown in figure 16c, the test paper based on sensor 1 is white and green in color and fluorescent, After the reactions of the phosgene gas, the color change to darkish pink and emit pink fluorescence. [246].
Hu
et al. reported that 4-chloro-7-nitrobenzo[c]-
[
1, 2, 5]
oxadiazole
(
NBD
) based
o-phenylenediamine
(
OPD
) group, are colorimetric
gas
sensing substances which can
swiftly
And
accurately
detect phosgene. [245].
however
,
NBD-OPD
phosgene
gas
sensors produce HCl as by-products which could result in secondary contamination.
to
overcome this problem,
Hu
et al. reported a new ring structure material, and they introduced the synthesized sensor 1, a
benzimidazole-fused
rhodamine
dye that can
efficaciously
detect phosgene
gas
.
they
have plotted the possible reaction mechanism among sensor-1 and phosgene in figure 16a.
consistent
with the 1H NMR spectrum of the product, the products produced after phosgene
gas
assay
showed
that it has a structure as indicated through the ring-opened
N-shloroformyl
-benzimadazle
2. Senor-1, with a
nanofiber
platform,
showed
color alternate and fluorescence upon exposure to phosgene
gas
. As shown in figure 16c, the
test
paper based on sensor 1 is white and
green in color
and fluorescent, After the reactions of the phosgene
gas
, the color
change
to
darkish
pink and emit pink fluorescence. [246].