Borate ester endcapped fluorescent hyperbranched conjugated polymer for trace peroxide explosive vapor detection
The vapor of peroxide explosives (PEs) is difficult to detect using fluorescent probes because PEs are not typical quenching agents, not having nitro groups or aromatic units that can easily interact with electron-rich probes. Three borate ester endcapped pyrenyl–fluorene copolymers were reported fo...
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Published in | RSC advances Vol. 5; no. 38; pp. 29624 - 29630 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.01.2015
|
Subjects | |
Online Access | Get full text |
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Summary: | The vapor of peroxide explosives (PEs) is difficult to detect using fluorescent probes because PEs are not typical quenching agents, not having nitro groups or aromatic units that can easily interact with electron-rich probes. Three borate ester endcapped pyrenyl–fluorene copolymers were reported for the detection of PEs, including a hyperbranched polymer (
S1
) and two linear polymers with borate esters on fluorenyl (
S2
) or pyrenyl (
S3
) units. It was found that the hyperbranched polymer
S1
has greater steric hindrance, more external borate ester groups, higher HOMO level and higher fluorescence quantum yield, which give it higher sensitivity to H
2
O
2
vapor than
S2
and
S3
. To further amplify the sensing performance toward H
2
O
2
vapor, a polymer/ZnO nanorod array composite was used, exploiting the catalytic ability and high area to volume ratio of the ZnO nanorod array. The fluorescence of the
S1
film is quenched by ∼60% and ∼30% under saturated vapor of H
2
O
2
and TATP, respectively, for 300 s at room temperature, and the detection limit for H
2
O
2
is estimated to be 1.6 ppb. These results reveal that the
S1
/ZnO nanorod array composite is very promising for the preparation of a highly sensitive fluorescence device for detecting the vapor of peroxide explosives. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/C5RA02472B |