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

Paper ID Volume ID Publish Year Pages File Format Full-Text
25916 43920 2016 9 PDF Available
Title
Self-aggregation of the pyrene labeled poly(acrylic acid) in nanoscopically crowded environments
Abstract

•Behavior of pyrene labeled poly(acrylic acid)s in AOT RMs was investigated.•Static and dynamic fluorescence were used to check the stiffness of polymers in RMs.•Spectral properties of the polymers depend on both π-π interactions and w0.

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 (w0). 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 π-π interactions. The efficiency of pyrene excimer formation indicated the “on-off” control of the polymer chain in RMs by triggering of w0. The constriction of the polymer coil in different nanocages of RMs influenced the formation of excimers. At low w0, 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.

Keywords
Fluorescent polymer; Pyrene excimer; Reverse micelle
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Self-aggregation of the pyrene labeled poly(acrylic acid) in nanoscopically crowded environments
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 328, 1 September 2016, Pages 33–41
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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