Self-aggregation of the pyrene labeled poly(acrylic acid) in nanoscopically crowded environments

被引:6
作者
Stinga, Gabriela [1 ]
Baran, Adriana [1 ]
Iovescu, Alina [1 ]
Simion, Elena Livia [1 ]
Aricov, Ludmila [1 ]
Anghel, Dan-Florin [1 ]
机构
[1] Romanian Acad, Ilie Murgulescu Inst Phys Chem, Colloid Chem Lab, 202 Spl Independentei, Bucharest 060021, Romania
关键词
Fluorescent polymer; Pyrene excimer; Reverse micelle; STEADY-STATE FLUORESCENCE; RESONANCE ENERGY-TRANSFER; REVERSE MICELLES; PHOTOPHYSICAL PROPERTIES; ASSOCIATION LEVEL; NANOPARTICLES; WATER; DYNAMICS; POLYELECTROLYTES; ADSORPTION;
D O I
10.1016/j.jphotochem.2016.05.021
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
The paper investigates the behavior of pyrene labeled poly(acrylic acid) with various graft content in sodium bis(2-ethylhexyl) sulfosuccinate (AOT) reverse micelles (RMs) at various hydration degrees (w(o)). The work is carried out by UV-vis, steady-state and time-resolved fluorescence as well as dynamic light scattering (DLS). The report indicates new insights regarding the interactions and dynamics of the fluorescent labeled polymer in the nanoscopic aqueous host. It was found that the spectral properties of the polymer depend on the H-bonds and pi-pi interactions. The efficiency of pyrene excimer formation indicated the "on-off" control of the polymer chain in RMs by triggering of wo. The constriction of the polymer coil in different nanocages of RMs influenced the formation of excimers. At low wo, the pyrene labeled poly(acrylic acid) senses the micellar interface. At higher hydration degree, the grafted polymer resides in the water pool of RMs with elevated polarity similar to that in the bulk water. The study discloses the ability of the pyrene-labeled polymer to sense the crowded nano-environments. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:33 / 41
页数:9
相关论文
共 51 条
[1]   Kinetics of p-nitrophenyl acetate hydrolysis catalyzed by Mucor java']javanicus lipase in AOT reverse micellar solutions formulated in different organic solvents [J].
Abuin, Elsa ;
Lissi, Eduardo ;
Biasutti, M. Alicia ;
Duarte, Roxanna .
PROTEIN JOURNAL, 2007, 26 (07) :475-479
[2]   Photoionization processes of charged pyrene derivatives in reverse micelles. The effect of the interfacial charge [J].
Altamirano, Marcela S. ;
Previtali, Carlos M. .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2015, 310 :165-170
[3]   Fluorescent dyes as model 'hydrophobic modifiers' of polyelectrolytes: a study of poly(acrylic acid)s labelled with pyrenyl and naphthyl groups [J].
Anghel, DF ;
Alderson, V ;
Winnik, FM ;
Mizusaki, M ;
Morishima, Y .
POLYMER, 1998, 39 (14) :3035-3044
[4]   Steady-state fluorescence investigation of pyrene-labeled poly(acrylic acid)s in aqueous solution and in the presence of sodium dodecyl sulfate [J].
Anghel, DF ;
Toca-Herrera, JL ;
Winnik, FM ;
Rettig, W ;
von Klitzing, R .
LANGMUIR, 2002, 18 (14) :5600-5606
[5]   Comparing the spectral properties of pyrene as free molecule, label and derivative in some colloidal systems [J].
Baran, Adriana ;
Stinga, Gabriela ;
Anghel, Dan-Florin ;
Iovescu, Alina ;
Tudose, Madalina .
SENSORS AND ACTUATORS B-CHEMICAL, 2014, 197 :193-199
[6]   Photophysical properties of pyronin dyes in reverse micelles of AOT [J].
Bayraktutan, Tugba ;
Meral, Kadem ;
Onganer, Yavuz .
JOURNAL OF LUMINESCENCE, 2014, 145 :925-929
[7]  
Bunau G. V., 1970, JB BIRKSPHOTOPHYSICS, V74, P1294
[8]   The effect of γ-cyclodextrin addition in the self-assembly behavior of pyrene labeled poly(acrylic) acid with different chain sizes [J].
Costa, Telma ;
De Melo, J. S. Seixas .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2008, 46 (04) :1402-1415
[9]   Association of a Hydrophobically Modified Polyelectrolyte and a Block Copolymer Followed by Fluorescence Techniques [J].
Costa, Telma ;
Schillen, Karin ;
Miguel, Maria da G. ;
Lindman, Bjorn ;
de Melo, J. Seixas .
JOURNAL OF PHYSICAL CHEMISTRY B, 2009, 113 (18) :6194-6204
[10]   The Conundrum of pH in Water Nanodroplets: Sensing pH in Reverse Micelle Water Pools [J].
Crans, Debbie C. ;
Levinger, Nancy E. .
ACCOUNTS OF CHEMICAL RESEARCH, 2012, 45 (10) :1637-1645