Applications of fluorescent sensor based on 1H-pyrazolo[3,4-b]quinoline in analytical chemistry

Marek Mac , Tomasz Uchacz , Andrzej Danel , Hanna Musiolik


Fluorescent dye 2-[(2-Hydroxyethyl)-(1,3-diphenyl-1H-pyrazolo[3,4-b]quinolin-6-ylmethyl)-amino]ethanol (LL1) was examined for its efficiency in the detection of small inorganic cations (lithium, sodium, barium, calcium, magnesium, cadmium, lead and zinc). The dye was synthesized in the laboratory and investigated by means of both, steady-state and time-resolved fluorescence techniques. This compound acts as a fluorescent sensor suitable for detection of small inorganic cations (lithium, sodium, barium, calcium, magnesium, cadmium, lead and zinc) in strongly polar solvent (acetonitrile). An electron transfer from the electro-donative part (receptor) of the molecule to the acceptor part (fluorophore) is thought to be the main mechanism that underlies functionality of the compound as a sensor. This process can be retarded upon complexation of the receptor moiety by inorganic cations. Relatively high sensitivity but poor selectivity of the amino alcohol that contains indicator towards the two-valued cations was observed. However, upon addition of some amounts of water the selectivity of this sensor has been enhanced (especially towards lead cation). The preliminary results in analytical application of the sensor are discussed.
Author Marek Mac
Marek Mac,,
, Tomasz Uchacz
Tomasz Uchacz,,
, Andrzej Danel (FoAaE / DoChaP)
Andrzej Danel,,
- Department of Chemistry and Physics
, Hanna Musiolik
Hanna Musiolik,,
Journal seriesJournal of Fluorescence, ISSN 1053-0509, (A 25 pkt)
Issue year2013
Publication size in sheets0.5
Keywords in EnglishFluorescent molecular probes, Photoinduced electron transfer, Time resolved fluorescence, Pyrazolo[3,4-b]quinoline
ASJC Classification3308 Law; 1308 Clinical Biochemistry; 1607 Spectroscopy; 3312 Sociology and Political Science; 3301 Social Sciences (miscellaneous); 3203 Clinical Psychology; 1303 Biochemistry
Internal identifierWRE/P/72/2013; WRE/5/8
Languageen angielski
Score (nominal)25
Score sourcejournalList
Publication indicators WoS Citations = 6; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 0.793; WoS Impact Factor: 2013 = 1.667 (2) - 2013=1.773 (5)
Citation count*7 (2020-04-03)
Additional fields
FinansowanieDS 3133/KCh/2012
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