TY - JOUR
T1 - An ultra sensitive fluorescent nanosensor for detection of ionic copper
AU - Kacmaz, Sibel
AU - Ertekin, Kadriye
AU - Mercan, Deniz
AU - Oter, Ozlem
AU - Cetinkaya, Engin
AU - Celik, Erdal
PY - 2015/1/25
Y1 - 2015/1/25
N2 - A stable and ultra sensitive nano-scale fluorescent chemo-sensor for trace amounts of Cu2+ was proposed. The Cu2+ selective fluoroionophore 2-{[(2-aminophenyl)imino]methyl}-4,6-di-tert-butylphenol (DMK-7) was encapsulated in polymeric ethyl cellulose. The sensing membranes were fabricated in form of nanofibers and thin films. When embedded in polymers, the exploited DMK-7 dye exhibited enhanced photophysical characteristics in absorbance, Stoke's shift, fluorescence quantum yield, and short and long-term photostability with respect to the solution phase. Sensing abilities of the nanofibers and thin films were tested by steady state and time resolved fluorescence spectroscopy. To our knowledge, this is the first attempt using the DMK-7-doped electrospun nanofibrous materials for copper sensing. The offered sensor displayed a sensitive response with a detection limit of 3.3 × 10-13 M for Cu2+ ions over a wide concentration range of 5.0 × 10-12-5.0 × 10-5. Additionally, exhibited high selectivity over convenient cations; Na+, K +, Ca2+, Mg2+, NH4+ and Ag+, Al3+, Ba2+, Co2+, Cr 3+, Fe3+, Fe2+, Hg2+, Li +, Mn2+, Ni2+, Pb2+, Sn2+ and Zn2+.
AB - A stable and ultra sensitive nano-scale fluorescent chemo-sensor for trace amounts of Cu2+ was proposed. The Cu2+ selective fluoroionophore 2-{[(2-aminophenyl)imino]methyl}-4,6-di-tert-butylphenol (DMK-7) was encapsulated in polymeric ethyl cellulose. The sensing membranes were fabricated in form of nanofibers and thin films. When embedded in polymers, the exploited DMK-7 dye exhibited enhanced photophysical characteristics in absorbance, Stoke's shift, fluorescence quantum yield, and short and long-term photostability with respect to the solution phase. Sensing abilities of the nanofibers and thin films were tested by steady state and time resolved fluorescence spectroscopy. To our knowledge, this is the first attempt using the DMK-7-doped electrospun nanofibrous materials for copper sensing. The offered sensor displayed a sensitive response with a detection limit of 3.3 × 10-13 M for Cu2+ ions over a wide concentration range of 5.0 × 10-12-5.0 × 10-5. Additionally, exhibited high selectivity over convenient cations; Na+, K +, Ca2+, Mg2+, NH4+ and Ag+, Al3+, Ba2+, Co2+, Cr 3+, Fe3+, Fe2+, Hg2+, Li +, Mn2+, Ni2+, Pb2+, Sn2+ and Zn2+.
KW - Copper
KW - Cu (II)
KW - Electrospinning
KW - Fluorescent probes
KW - Nano-scale sensor
KW - Optical sensors
UR - http://www.scopus.com/inward/record.url?scp=84907300427&partnerID=8YFLogxK
U2 - 10.1016/j.saa.2014.07.056
DO - 10.1016/j.saa.2014.07.056
M3 - Article
C2 - 25123945
AN - SCOPUS:84907300427
SN - 1386-1425
VL - 135
SP - 551
EP - 559
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
ER -