scholarly journals Synthesis and Acid-Responsiveness of an Insulated π-Conjugated Polymer Containing Spiropyrans in Its Backbone

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1301 ◽  
Author(s):  
Hiromichi V. Miyagishi ◽  
Takashi Tamaki ◽  
Hiroshi Masai ◽  
Jun Terao
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Quantum Yield ◽  
Conjugated Polymer ◽  
Luminescence Quenching ◽  
Polymer Chains ◽  
Phenylene Ethynylene ◽  
Complete Conversion

A π-conjugated polymer containing spiropyrans (SPs), which could be almost completely converted to protonated merocyanines (MCH+) and back to the SP form by adding an acid and a base, respectively, was developed. The insulation of the π-conjugated polymer, referred to as insulated spiropyran-containing poly(p-phenylene ethynylene) (ins-SP-PPE), using permethylated α-cyclodextrins (PM α-CD) suppressed the π-π interaction between the polymer chains containing MCH+, and the installation of PM α-CD improved the switching ability of SPs. The polymer exhibited repeatable acidochromism with almost complete conversion between the SP and MCH+ forms. Photoluminescence measurements were conducted and the acid-induced luminescence quenching of the polymer in the solution was observed, which stemmed from energy transfer from the PPE to MCH+ moieties. In the solid state, the quantum yield of ins-SP-PPE was more than twice that of the uninsulated polymer, which derived from the insulation effects. The acid-induced luminescence quenching was also observed in the solid state.

scholarly journals Assemblies of conjugated polymers: Intermolecular and intramolecular effects on the photophysical properties of conjugated polymers

2002 ◽  
Vol 74 (11) ◽  
pp. 2031-2044 ◽  
Author(s):  
Jinsang Kim
Keyword(s):  
Solid State ◽  
Conjugated Polymers ◽  
Conjugated Polymer ◽  
Chemical Structure ◽  
Field Effect Transistors ◽  
Photophysical Properties ◽  
Polymer Chains ◽  
Critical Parameters ◽  
Light Emitting ◽  
Recent Developments

Conjugated polymers are emerging materials for electronic applications due to the tunability of their properties through variation of their chemical structure. Their applications, which currently include light-emitting diodes (LEDs), field effect transistors (FETs), plastic lasers, batteries, and sensors, are expanding to many new areas. The two critical parameters that determine the function of conjugated polymer-based devices are chemical structure and nanostructure of a conjugated polymer in the solid state. While the physical properties of isolated polymers are primarily controlled by their chemical structure, these properties are drastically altered in the solid state due to electronic coupling between polymer chains as determined by their interpolymer packing and conformation. However, the development of effective and precise methods for controlling the nanostructure of polymers in the solid state has been limited because polymers often fail to assemble into organized structures due to their amorphous character and large molecular weight.In this review, recent developments of organizing methods of conjugated polymers and the conformation and interpolymer interaction effects on the photophysical properties of conjugated polymers are summarized.

Fluorescence Blinking, Exciton Dynamics, and Energy Transfer Domains in Single Conjugated Polymer Chains

2008 ◽  
Vol 130 (22) ◽  
pp. 7042-7051 ◽  
Author(s):  
Hongzhen Lin ◽  
Seyed R. Tabaei ◽  
Daniel Thomsson ◽  
Oleg Mirzov ◽  
Per-Olof Larsson ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Conjugated Polymer ◽  
Polymer Chains ◽  
Exciton Dynamics ◽  
Conjugated Polymer Chains ◽  
Fluorescence Blinking

scholarly journals Synergistic photoluminescence enhancement in conjugated polymer-di-ureasil organic–inorganic composites

2015 ◽  
Vol 6 (12) ◽  
pp. 7227-7237 ◽  
Author(s):  
Niamh Willis-Fox ◽  
Ana-Teresa Marques ◽  
Jochen Arlt ◽  
Ullrich Scherf ◽  
Luís D. Carlos ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Conjugated Polymer ◽  
Inorganic Composites ◽  
Photoluminescence Quantum Yield ◽  
Photoluminescence Enhancement

Energy transfer between a hybrid di-ureasil host and conjugated polymer dopants results in a dramatic enhancement in the photoluminescence quantum yield due to exciton isolation at long-lived trap sites.

Photoluminescent Polymer Films for Display Applications

1999 ◽  
Vol 558 ◽  
Author(s):  
Anja Palmans ◽  
Andrea Montali ◽  
Christoph Weder ◽  
Paul Smith
Keyword(s):  
Energy Transfer ◽  
Conjugated Polymer ◽  
Dilute Solution ◽  
Phenylene Ethynylene ◽  
Polyethylene Matrix ◽  
Efficient Energy Transfer ◽  
Polymer Backbone ◽  
Flexible Spacer ◽  
The Matrix ◽  
Oriented Polyethylene

ABSTRACTNovel poly(p-phenylene ethynylene) polymers, ANT-OPPE and COU-OPPE, have been prepared, in which anthracene and coumarin sensitizer molecules are covalently attached to the conjugated polymer backbone via a flexible spacer. These polymers show efficient energy transfer from the pendent sensitizer molecule to the PPE backbone, both in dilute solution as well as in an oriented polyethylene matrix. In case of ANT-OPPE, we found that the PPE backbone adapts the orientation of the matrix and is efficiently oriented, while the anthracene moiety remains essentially isotropic, resulting in a state-of-the-art polarizing energy transfer for this system.

Photoluminescent Polymer Films for Display Applications

1999 ◽  
Vol 560 ◽  
Author(s):  
Anja Palmans ◽  
Andrea Montali ◽  
Christoph Weder ◽  
Paul Smith
Keyword(s):  
Energy Transfer ◽  
Conjugated Polymer ◽  
Dilute Solution ◽  
Phenylene Ethynylene ◽  
Polyethylene Matrix ◽  
Efficient Energy Transfer ◽  
Polymer Backbone ◽  
Flexible Spacer ◽  
The Matrix ◽  
Oriented Polyethylene

ABSTRACTNovel poly(ρ-phenylene ethynylene) polymers, ANT-OPPE and COU-OPPE, have been prepared, in which anthracene and coumarin sensitizer molecules are covalently attached to the conjugated polymer backbone via a flexible spacer. These polymers show efficient energy transfer from the pendent sensitizer molecule to the PPE backbone, both in dilute solution as well as in an oriented polyethylene matrix. In case of ANT-OPPE, we found that the PPE backbone adapts the orientation of the matrix and is efficiently oriented, while the anthracene moiety remains essentially isotropic, resulting in a state-of-the-art polarizing energy transfer for this system.

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