TY - JOUR
T1 - Combined quenching mechanism of anthracene fluorescence by cetylpyridinium chloride in sodium dodecyl sulfate micelles
AU - Soemo, Angela R.
AU - Pemberton, Jeanne E.
N1 - Funding Information:
Acknowledgments The authors gratefully acknowledge support of this work by the National Science Foundation (CHE-0714245).
PY - 2014/3
Y1 - 2014/3
N2 - The Stern-Volmer quenching constant (KSV) for quenching of anthracene fluorescence in sodium dodecyl sulfate (SDS) micelles by pyridinium chloride has been reported previously to be 520 M-1 based on steady state fluorescence measurements. However, such measurements cannot distinguish static versus dynamic contributions to the overall quenching. In the work reported here, the quenching dynamics of anthracene in SDS micelles by cetylpyridinium chloride (CPC), an analogue of pyridinium chloride, were investigated using both steady state and time resolved fluorescence quenching. Concurrent measurement of the decrease in fluorescence intensity and lifetime of anthracene provide a quantitative evaluation of collision induced (i.e. dynamic) versus complex formation (i.e. static) quenching of the anthracene fluorophore. The results reveal that a combined quenching mechanism is operative with approximately equal constants of 249∈±∈6 M-1 and 225∈±∈12 M-1 for dynamic and static quenching, respectively.
AB - The Stern-Volmer quenching constant (KSV) for quenching of anthracene fluorescence in sodium dodecyl sulfate (SDS) micelles by pyridinium chloride has been reported previously to be 520 M-1 based on steady state fluorescence measurements. However, such measurements cannot distinguish static versus dynamic contributions to the overall quenching. In the work reported here, the quenching dynamics of anthracene in SDS micelles by cetylpyridinium chloride (CPC), an analogue of pyridinium chloride, were investigated using both steady state and time resolved fluorescence quenching. Concurrent measurement of the decrease in fluorescence intensity and lifetime of anthracene provide a quantitative evaluation of collision induced (i.e. dynamic) versus complex formation (i.e. static) quenching of the anthracene fluorophore. The results reveal that a combined quenching mechanism is operative with approximately equal constants of 249∈±∈6 M-1 and 225∈±∈12 M-1 for dynamic and static quenching, respectively.
KW - Alkylpyridinium chloride
KW - Anthracene
KW - SDS
KW - Surfactant micelles
KW - Time-resolved fluorescence quenching
UR - http://www.scopus.com/inward/record.url?scp=84898905079&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898905079&partnerID=8YFLogxK
U2 - 10.1007/s10895-013-1319-2
DO - 10.1007/s10895-013-1319-2
M3 - Article
AN - SCOPUS:84898905079
SN - 1053-0509
VL - 24
SP - 295
EP - 299
JO - Journal of Fluorescence
JF - Journal of Fluorescence
IS - 2
ER -