Scaling Relations Related to the Kinetics of Excimer Formation between Pyrene Groups Attached onto Poly(N,N-dimethylacrylamide)s

Scaling Relations Related to the Kinetics of Excimer Formation between Pyrene Groups Attached onto Poly(N,N-dimethylacrylamide)s

The fluorescence decays of the pyrene monomer of a series of pyrene-labeled poly(N,N-dimethylacrylamide)s (PyPDMAAm) were acquired in N,N-dimethylformamide (DMF) and acetone with different concentrations of nitromethane and at very low polymer concentration. DMF and acetone are good and mediocre sol...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecules Vol. 35; no. 22; pp. 8571 - 8577
Main Authors: Kanagalingam, Sabesh, Spartalis, John, Cao, Tri-Minh, Duhamel, Jean
Format: Journal Article
Language:English
Published: Washington, DC American Chemical Society 22-10-2002
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Solvent effect
Chemical solution
Fluorescent tracer
Labelled polymer
Excimer
Fluorescence
Pyrene derivatives
Kinetics
Experimental study
Acrylamide derivative polymer
Luminescence decay
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fluorescence decays of the pyrene monomer of a series of pyrene-labeled poly(N,N-dimethylacrylamide)s (PyPDMAAm) were acquired in N,N-dimethylformamide (DMF) and acetone with different concentrations of nitromethane and at very low polymer concentration. DMF and acetone are good and mediocre solvents for PyPDMAAm, respectively. Nitromethane is a potent quencher of pyrene. Nitromethane addition to the polymer solution shortens the pyrene lifetime. The fluorescence decays of the quenched and unquenched pyrene-labeled polymers were analyzed with a blob model. Shortening the lifetime of pyrene reduces the volume probed by the dye while it remains excited. For each quencher concentration, the blob volume and size were determined, and scaling laws were shown to hold. The exponents retrieved from the scaling relationships agreed with those reported in polymer science textbooks.
Bibliography:ark:/67375/TPS-8W37R86P-7
istex:19D536D5F05522BADE086B966DDA7FA1876D650E
ISSN:0024-9297
1520-5835
DOI:10.1021/ma020784w