Fluorescence emission and image patterning from selective photocyclic aromatization of cis-cisoid helical poly(phenylacetylene)s in situ in a film via top-down photodegradation

被引：2

作者：

Jin, Young-Jae ^{[1
]}

Park, Hyosang ^{[1
]}

Lee, Chang-Lyoul ^{[2
]}

Teraguchi, Masahiro ^{[3
]}

Kaneko, Takashi ^{[3
]}

Aoki, Toshiki ^{[3
]}

Kwak, Giseop ^{[1
]}

机构：

[1] Kyungpook Natl Univ, Dept Polymer Sci & Engn, Polymer Nanomat Lab, Sch Appl Chem Engn, 1370 Sankyuk Dong, Daegu 702701, South Korea

[2] Gwangju Inst Sci & Technol, Adv Photon Res Inst, 1 Oryong Dong, Gwangju, South Korea

[3] Niigata Univ, Ctr Transdisciplinary Res, Grad Sch Sci & Technol, Dept Chem & Chem Engn,Nishi Ku, Ikarashi 2-8050, Niigata 9502181, Japan

来源：

DYES AND PIGMENTS | 2018年 / 149卷

基金：

新加坡国家研究基金会;

关键词：

Cis-cisoid helical poly(phenylacetylene)s; Photodegradation; Selective photocyclic aromatization; Excimer emission; Fluorescence image pattern; PHOTOLUMINESCENCE; STATE;

D O I：

10.1016/j.dyepig.2017.10.035

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Selective photocyclic aromatization (SCAT) of cis-cisoid helical poly(phenylacetylene) derivatives was investigated during the in situ photodegradation in a film. An infrared absorption peak appeared at similar to 1700 cm(-1) owing to the overtone vibration of the 1,3,5-trisubstituted benzene and the peak at 1060 cm(-1) due to the cis C=C bending of the main chain decreased, indicating occurrence of SCAT. Simultaneously, the polymer film became emissive in visible region during SCAT. The fluorescence (FL) quantum efficiency was approximately 0.92% in the film and not so much high relative to usual fluorophores. The FL emission disappeared in an instant when the decomposition product dissolved in a solvent. The FL lifetime of the polymer film increased with photodegradation. These all indicated the occurrence of excimer emission. A finely resolved FL image pattern was readily obtained using a photomask.

引用

页码：444 / 448

页数：5

共 15 条

[1] π-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport [J].