Effect of Polymer Chain Folding on the Transition from H- to J-Aggregate Behavior in P3HT Nanofibers

被引：96

作者：

Baghgar, Mina ^{[1
]}

Labastide, Joelle A. ^{[2
]}

Bokel, Felicia ^{[3
]}

Hayward, Ryan C. ^{[3
]}

Barnes, Michael D. ^{[1
,2
]}

机构：

[1] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[2] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA

[3] Univ Massachusetts, Dept Polymer Sci & Engn, Silvio O Conte Natl Ctr Polymer Res, Amherst, MA 01003 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 04期

关键词：

POLARIZATION-RESOLVED PHOTOLUMINESCENCE; THIN-FILMS; POLY(3-HEXYLTHIOPHENE); POLYTHIOPHENE; DYNAMICS; LUMINESCENCE; INTRACHAIN; MOBILITY; SOLVENT;

D O I：

10.1021/jp411668g

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：

A combination of wavelength-, time-, and polarization-resolved photoluminescence imaging on isolated P3HT nanofibers of varying molecular weight (from 10 to 65 kDa) has revealed a transition in dominant exciton coupling from primarily interchain (H-aggregation) for low molecular weight nanofibers, to predominantly intrachain (J-aggregation) coupling for high molecular weight nanofibers. Based on nanofiber width measurement from TEM imaging, the driving force for this transition appears to be folding of individual polymer chains within the lamellae, resulting in enhanced chain planarity and reduced torsional disorder.

引用

页码：2229 / 2235

页数：7

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