Well-Packed Chains and Aggregates in the Emission Mechanism of Conjugated Polymers

2005 ◽  
Vol 109 (19) ◽  
pp. 9368-9373 ◽  
Author(s):  
Kang-Yung Peng ◽  
Show-An Chen ◽  
Wun-Shain Fann ◽  
Su-Hua Chen ◽  
An-Chung Su
Keyword(s):  
Conjugated Polymers ◽  
Emission Mechanism

scholarly journals Polymerization-Induced Emission

2019 ◽  
Author(s):  
Bin Liu ◽  
Haoke Zhang ◽  
shunjie liu ◽  
JingZhi Sun ◽  
Xing-Hong Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Polymer Synthesis ◽  
Luminescent Materials ◽  
Emission Mechanism ◽  
Luminescent Polymers ◽  
Recent Developments ◽  
Multi Level

<p>This article highlights the recent developments of unorthodox luminescent polymers without large p-conjugated structure and their luminescence mechanism in last 2–3 years. Non-conjugated luminescent polymers (NCLPs) will be a wonderful polymer that will provide new soft luminescent materials. Uniting polymer synthesis and photophysical science, <i>Polymerization-Induced Emission</i> (PIE) is proposed for making NCLPs because the advanced polymerization methods have unlimited opportunities to the development of new soft luminescent polymers owing to the multi-level structures of polymers. The importance of this paper is to inspire more thoughts on the emission mechanism of the non-conjugated polymers and developing new soft luminescent materials.</p>

scholarly journals Polymerization-Induced Emission

2019 ◽  
Author(s):  
Bin Liu ◽  
Haoke Zhang ◽  
shunjie liu ◽  
JingZhi Sun ◽  
Xing-Hong Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Polymer Synthesis ◽  
Luminescent Materials ◽  
Emission Mechanism ◽  
Luminescent Polymers ◽  
Recent Developments ◽  
Multi Level

<p>This article highlights the recent developments of unorthodox luminescent polymers without large p-conjugated structure and their luminescence mechanism in last 2–3 years. Non-conjugated luminescent polymers (NCLPs) will be a wonderful polymer that will provide new soft luminescent materials. Uniting polymer synthesis and photophysical science, <i>Polymerization-Induced Emission</i> (PIE) is proposed for making NCLPs because the advanced polymerization methods have unlimited opportunities to the development of new soft luminescent polymers owing to the multi-level structures of polymers. The importance of this paper is to inspire more thoughts on the emission mechanism of the non-conjugated polymers and developing new soft luminescent materials.</p>

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

On the Cold Emission Mechanism of Diamond Coated Tips

1996 ◽  
Vol 06 (C5) ◽  
pp. C5-107-C5-112 ◽  
Author(s):  
V. V. Zhirnov
Keyword(s):  
Emission Mechanism

Oriented Luminescent Nanostructures From Single Molecules Of Conjugated Polymers

2003 ◽  
Vol 771 ◽  
Author(s):  
Adosh Mehta ◽  
Pradeep Kumar ◽  
Jie Zheng ◽  
Robert M. Dickson ◽  
Bobby Sumpter ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Polarization Anisotropy ◽  
Emission Pattern ◽  
Spectral Signatures ◽  
Dipole Emission ◽  
Ink Jet ◽  
Molecular Scale ◽  
Jet Printing ◽  
Photochemical Stability ◽  
Printing Techniques

AbstractDipole emission pattern imaging experiments on single chains of common conjugated polymers (solubilized poly phenylene vinylenes) isolated by ink-jet printing techniques have revealed surprising uniformity in transition moment orientation perpendicular to the support substrate. In addition to uniform orientation, these species show a number of striking differences in photochemical stability, polarization anisotropy,[1] and spectral signatures[2] with respect to similar (well-studied) molecules dispersed in dilute thin-films. Combined with molecular mechanics simulation, these results point to a structural picture of a folded macromolecule as a highly ordered cylindrical nanostructure whose long-axis (approximately collinear with the conjugation axis) is oriented, by an electrostatic interaction, perpendicular to the coverglass substrate. These results suggest a number of important applications in nanoscale photonics and molecular-scale optoelectronics.

Toward highly photoluminescent and bipolar charge-transporting conjugated polymers

2000 ◽  
Vol 154 (1) ◽  
pp. 245-252 ◽  
Author(s):  
Zhonghua Peng ◽  
Yongchun Pan ◽  
Bubin Xu ◽  
Jianheng Zhang
Keyword(s):  
Conjugated Polymers ◽  
Bipolar Charge

Clustering-Triggered Efficient Room Temperature Phosphorescence from Nonconventional Luminophores

2019 ◽  
Author(s):  
Shuyuan Zheng ◽  
Taiping Hu ◽  
Xin Bin ◽  
Yunzhong Wang ◽  
Yuanping Yi ◽  
...  
Keyword(s):  
Room Temperature ◽  
High Efficiency ◽  
Spin Orbit Coupling ◽  
Design Rationale ◽  
Emission Mechanism ◽  
Room Temperature Phosphorescence ◽  
Electronic Interactions ◽  
Energy Gaps ◽  
Theoretical Results

Pure organic room temperature phosphorescence (RTP) and luminescence from nonconventional luminophores have gained increasing attention. However, it remains challenging to achieve efficient RTP from unorthodox luminophores, on account of the unsophisticated understanding of the emission mechanism. Here we propose a strategy to realize efficient RTP in nonconventional luminophores through incorporation of lone pairs together with clustering and effective electronic interactions. The former promotes spin-orbit coupling and boost the consequent intersystem crossing, whereas the latter narrows energy gaps and stabilizes the triplets, thus synergistically affording remarkable RTP. Experimental and theoretical results of urea and its derivatives verify the design rationale. Remarkably, RTP from thiourea solids with unprecedentedly high efficiency of up to 24.5% is obtained. Further control experiments testify the crucial role of through-space delocalization on the emission. These results would spur the future fabrication of nonconventional phosphors, and moreover should advance understanding of the underlying emission mechanism.<br>

Sign in / Sign up

Export Citation Format

Share Document