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Title: Assembly and Characterization ofWell-DefinedHigh-Molecular-Weight Poly(p-phenylene) Polymer Brushes

Abstract

The assembly and characterization of well-de ned, end-tethered poly- (p-phenylene) (PPP) brushes having high molecular weight, low polydispersity and high 1,4-stereoregularity are presented. The PPP brushes are formed using a precursor route that relies on either self-assembly or spin coating of high molecular weight (degrees of poly- merizations 54, 146, and 238) end-functionalized poly(1,3-cyclohexadiene) (PCHD) chains from benzene solutions onto silicon or quartz substrates, followed by aromatization of the end-attached PCHD chains on the surface. The approach allows the thickness (grafting density) of the brushes to be easily varied. The dry brushes before and after aromatization are characterized by ellipsometry, atomic force microscopy, grazing angle attenuated total re ectance Fourier transform infrared spectroscopy, and UV-Vis spectros- copy. The properties of the PPP brushes are compared with those of lms made using oligo- paraphenylenes and with ab initio density functional theory simulations of optical proper- ties. Our results suggest conversion to fully aromatized, end-tetheredPPPpolymerbrusheshaving eective conjugation lengths of 5 phenyl units.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Center for Nanophase Materials Sciences; Center for Computational Sciences
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1026750
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 23; Journal Issue: 19
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AROMATIZATION; ATOMIC FORCE MICROSCOPY; BENZENE; CHAINS; COATINGS; ELLIPSOMETRY; FUNCTIONALS; MOLECULAR WEIGHT; OPTICAL PROPERTIES; POLYMERS; PRECURSOR; QUARTZ; SILICON; SPECTROSCOPY; SPIN; SUBSTRATES; THICKNESS

Citation Formats

Chen, Jihua, Dadmun, Mark D, Mays, Jimmy, Messman, Jamie M, Hong, Kunlun, Britt, Phillip F, Sumpter, Bobby G, Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Bredas, Jean-Luc E, Malagoli, Massimo, Deng, Suxiang, Swader, Onome A, and Yu, Xiang. Assembly and Characterization ofWell-DefinedHigh-Molecular-Weight Poly(p-phenylene) Polymer Brushes. United States: N. p., 2011. Web.
Chen, Jihua, Dadmun, Mark D, Mays, Jimmy, Messman, Jamie M, Hong, Kunlun, Britt, Phillip F, Sumpter, Bobby G, Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Bredas, Jean-Luc E, Malagoli, Massimo, Deng, Suxiang, Swader, Onome A, & Yu, Xiang. Assembly and Characterization ofWell-DefinedHigh-Molecular-Weight Poly(p-phenylene) Polymer Brushes. United States.
Chen, Jihua, Dadmun, Mark D, Mays, Jimmy, Messman, Jamie M, Hong, Kunlun, Britt, Phillip F, Sumpter, Bobby G, Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Bredas, Jean-Luc E, Malagoli, Massimo, Deng, Suxiang, Swader, Onome A, and Yu, Xiang. Sat . "Assembly and Characterization ofWell-DefinedHigh-Molecular-Weight Poly(p-phenylene) Polymer Brushes". United States.
@article{osti_1026750,
title = {Assembly and Characterization ofWell-DefinedHigh-Molecular-Weight Poly(p-phenylene) Polymer Brushes},
author = {Chen, Jihua and Dadmun, Mark D and Mays, Jimmy and Messman, Jamie M and Hong, Kunlun and Britt, Phillip F and Sumpter, Bobby G and Alonzo Calderon, Jose E and Kilbey, II, S Michael and Ankner, John Francis and Bredas, Jean-Luc E and Malagoli, Massimo and Deng, Suxiang and Swader, Onome A and Yu, Xiang},
abstractNote = {The assembly and characterization of well-de ned, end-tethered poly- (p-phenylene) (PPP) brushes having high molecular weight, low polydispersity and high 1,4-stereoregularity are presented. The PPP brushes are formed using a precursor route that relies on either self-assembly or spin coating of high molecular weight (degrees of poly- merizations 54, 146, and 238) end-functionalized poly(1,3-cyclohexadiene) (PCHD) chains from benzene solutions onto silicon or quartz substrates, followed by aromatization of the end-attached PCHD chains on the surface. The approach allows the thickness (grafting density) of the brushes to be easily varied. The dry brushes before and after aromatization are characterized by ellipsometry, atomic force microscopy, grazing angle attenuated total re ectance Fourier transform infrared spectroscopy, and UV-Vis spectros- copy. The properties of the PPP brushes are compared with those of lms made using oligo- paraphenylenes and with ab initio density functional theory simulations of optical proper- ties. Our results suggest conversion to fully aromatized, end-tetheredPPPpolymerbrusheshaving eective conjugation lengths of 5 phenyl units.},
doi = {},
journal = {Chemistry of Materials},
number = 19,
volume = 23,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2011},
month = {Sat Jan 01 00:00:00 EST 2011}
}