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Title: Assembly and Characterization of Well Defined High Molecular Weight Poly(p-phenylene) Polymer Brushes

Abstract

The assembly and characterization of well-defined, 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 polymerizations 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 reflectance Fourier transform infrared spectroscopy, and UV-Vis spectroscopy. The properties of the PPP brushes are compared with those of films made using oligo-paraphenylenes and with ab initio density functional theory simulations of optical properties. Our results suggest conversion to fully aromatized, end-tethered PPP polymer brushes having effective 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
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1029567
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Nano; Journal Volume: 23; Journal Issue: 19
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; AROMATIZATION; ATOMIC FORCE MICROSCOPY; BENZENE; CHAINS; COATINGS; ELECTRONIC STRUCTURE; ELLIPSOMETRY; FUNCTIONALS; MOLECULAR WEIGHT; OPTICAL PROPERTIES; POLYMERS; PRECURSOR; QUARTZ; SILICON; SPECTROSCOPY; SPIN; SUBSTRATES; THICKNESS; THIN FILMS

Citation Formats

Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Britt, Phillip F, Chen, Jihua, Dadmun, Mark D, Deng, Suxiang, Hong, Kunlun, Mays, Jimmy, Messman, Jamie M, Sumpter, Bobby, Swader, Onome A, Yu, Xiang, Bredas, Jean-Luc E, and Malagoli, Massimo. Assembly and Characterization of Well Defined High Molecular Weight Poly(p-phenylene) Polymer Brushes. United States: N. p., 2011. Web. doi:10.1021/cm201819p.
Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Britt, Phillip F, Chen, Jihua, Dadmun, Mark D, Deng, Suxiang, Hong, Kunlun, Mays, Jimmy, Messman, Jamie M, Sumpter, Bobby, Swader, Onome A, Yu, Xiang, Bredas, Jean-Luc E, & Malagoli, Massimo. Assembly and Characterization of Well Defined High Molecular Weight Poly(p-phenylene) Polymer Brushes. United States. doi:10.1021/cm201819p.
Alonzo Calderon, Jose E, Kilbey, II, S Michael, Ankner, John Francis, Britt, Phillip F, Chen, Jihua, Dadmun, Mark D, Deng, Suxiang, Hong, Kunlun, Mays, Jimmy, Messman, Jamie M, Sumpter, Bobby, Swader, Onome A, Yu, Xiang, Bredas, Jean-Luc E, and Malagoli, Massimo. Sat . "Assembly and Characterization of Well Defined High Molecular Weight Poly(p-phenylene) Polymer Brushes". United States. doi:10.1021/cm201819p.
@article{osti_1029567,
title = {Assembly and Characterization of Well Defined High Molecular Weight Poly(p-phenylene) Polymer Brushes},
author = {Alonzo Calderon, Jose E and Kilbey, II, S Michael and Ankner, John Francis and Britt, Phillip F and Chen, Jihua and Dadmun, Mark D and Deng, Suxiang and Hong, Kunlun and Mays, Jimmy and Messman, Jamie M and Sumpter, Bobby and Swader, Onome A and Yu, Xiang and Bredas, Jean-Luc E and Malagoli, Massimo},
abstractNote = {The assembly and characterization of well-defined, 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 polymerizations 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 reflectance Fourier transform infrared spectroscopy, and UV-Vis spectroscopy. The properties of the PPP brushes are compared with those of films made using oligo-paraphenylenes and with ab initio density functional theory simulations of optical properties. Our results suggest conversion to fully aromatized, end-tethered PPP polymer brushes having effective conjugation lengths of 5 phenyl units.},
doi = {10.1021/cm201819p},
journal = {ACS Nano},
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}
}