Quenching of pyrene derivatives' fluorescence by nitroxide radicals in sodium dodecyl sulfate micellar solutions

被引:14
作者
Angelescu, D [1 ]
Vasilescu, M [1 ]
机构
[1] Inst Phys Chem, Bucharest 77208, Romania
关键词
fluorescence quenching; pyrene derivatives; nitroxide radicals; sodium dodecyl sulfate (SDS);
D O I
10.1006/jcis.2001.7900
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dynamic fluorescence quenching measurements have been performed on pyrene derivatives (pyrene (Py), 1-pyrenebutanoic acid (PBA), and 1-pyrenedodecanoic acid (PDA)), using as quenchers nitroxide free radicals (2,2,6,6-tetramethyl-1,1-piperidinyloxyl, 4-hydroxy-2,2,6,6-tetramethyl-1,1-piperidinyloxyl, and 3-carbamoyl-2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy (TEMN)) in aqueous solutions of sodium dodecyl sulfate. The mean aggregation number values are comparable with the literature data only when the partition coefficient of the quencher is higher than 1100 M-1. It is shown that the dynamic fluorescence quenching for the PBA/TEMN pair cannot be described by the Infelta-Tachiya model owing to the fact that the intramicellar quenching rate constant is lower than the exit rate constant of the quencher from the micelle. The average location of the fluorescent probes is also discussed, Py and PDA having the pyrenyl moieties located at approximately the same depth in the micellar core, while in the case of PBA the pyrenyl moiety is buried deeper. (C) 2001 Academic Press.
引用
收藏
页码:139 / 144
页数:6
相关论文
共 50 条
[1]   Different micellar packing and hydrophobicity of the membrane probes TEMPO and TEMPOL influence their partition between aqueous and micellar phases rather than location in the micelle interior [J].
Almeida, LE ;
Borissevitch, IE ;
Yushmanov, VE ;
Tabak, M .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1998, 203 (02) :456-463
[2]   SIZE OF SODIUM DODECYL-SULFATE MICELLES IN THE PRESENCE OF ADDITIVES .1. ALCOHOLS AND OTHER POLAR COMPOUNDS [J].
ALMGREN, M ;
SWARUP, S .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1983, 91 (01) :256-266
[3]   EFFECTS OF POLYDISPERSITY ON FLUORESCENCE QUENCHING IN MICELLES [J].
ALMGREN, M ;
LOFROTH, JE .
JOURNAL OF CHEMICAL PHYSICS, 1982, 76 (05) :2734-2743
[4]  
ALMGREN M, 1998, PROG COLLOID POLYM S, V76, P68
[5]  
ALMGREN M, 1992, ADV COLLOID INTERFAC, V9, P41
[6]   Deactivation of pyrene derivatives by nitroxides in AOT reverse micelles. Dependence of quenching efficiency on the probe and quencher location in the microaggregates [J].
Alvarez, J ;
Lissi, EA ;
Encinas, MV .
LANGMUIR, 1996, 12 (07) :1738-1743
[7]  
[Anonymous], 1994, RUSS CHEM REV+, DOI [DOI 10.1070/RC1994V063N05ABEH000091, 10.1070/RC1994v063n05ABEH000091]
[8]   NITROXYL RADICAL QUENCHING OF PYRENE FLUORESCENCE IN MICELLAR ENVIRONMENTS - DEVELOPMENT OF A KINETIC-MODEL FOR STEADY-STATE AND TRANSIENT EXPERIMENTS [J].
ATIK, SS ;
SINGER, LA .
CHEMICAL PHYSICS LETTERS, 1978, 59 (03) :519-524
[9]  
Barzykin AV, 1996, HETEROGEN CHEM REV, V3, P105, DOI 10.1002/(SICI)1234-985X(199606)3:2<105::AID-HCR56>3.0.CO
[10]  
2-3