Differential detection of strong acids in weak acids: a combination of a benzimidazole-carbazole backbone with AIE luminophores as highly sensitive and selective turn-on fluorescent probes

o -BzcDPE and p -BzcDPE have been synthesized and used as probes for strong acid detection. The probes contain aggregation-induced emission luminogens (AIEgens) that are incorporated with a benzimidazole-carbazole backbone. Both probes show turn-on green fluorescence with a good contrast in the pres...

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Published inNew journal of chemistry Vol. 46; no. 21; pp. 1317 - 1327
Main Authors Lin, Pei-Chi, Lin, Yu-Ting, Liu, Kuan-Ting, Chen, Meng-Sin, Zhang, Yong-Yun, Li, Jie-Cheng, Leung, Man-kit
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 30.05.2022
Royal Society of Chemistry
Subjects
Acetic acid
Acids
Backbone
Carbazoles
Chemistry
Chemistry, Multidisciplinary
Crystallography
Fluorescent indicators
NMR spectroscopy
Physical Sciences
Protonation
Response time
Science & Technology
Selectivity
Sulfuric acid
BODIPY
ELECTRON-TRANSFER
FLUOROPHORES
AGGREGATION-INDUCED EMISSION
DONOR
PH
ENHANCED EMISSION
TETRAPHENYLETHYLENE
DERIVATIVES
INTRAMOLECULAR CHARGE-TRANSFER
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Summary:o -BzcDPE and p -BzcDPE have been synthesized and used as probes for strong acid detection. The probes contain aggregation-induced emission luminogens (AIEgens) that are incorporated with a benzimidazole-carbazole backbone. Both probes show turn-on green fluorescence with a good contrast in the presence of trace amounts of strong acids in a weak acid environment. These probes are not only suitable for visual detection of strong acids, but also exhibit high selectivity, excellent sensitivity, and short response time and are capable of quantitative detection of strong acids with a good linear relationship. A concentration of H 2 SO 4 as low as 1 mol% in acetic acid can be differentiated. The fluorescence-turn-on mechanisms are due to protonation on the benzimidazole moiety that have been proved by X-ray crystallographic analysis and NMR spectroscopy. With the combination of a benzimidazole-carbazole backbone and AIE luminophores, highly sensitive and selective turn-on fluorescent probes are achieved and applicable for differential detection of strong acids in weak acids.
Bibliography:Electronic supplementary information (ESI) available. CCDC
For ESI and crystallographic data in CIF or other electronic format see DOI
https://doi.org/10.1039/d2nj01226j
2153889-2153891
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1144-0546
1369-9261
DOI:10.1039/d2nj01226j