Manipulating charge-transfer character and tuning emission color with electron-withdrawing main-group moieties in iridium-based electrophosphors: a theoretical investigation

2012 ◽  
Vol 25 (12) ◽  
pp. 1351-1358 ◽  
Author(s):  
Xe-Qin Ran ◽  
Ji-Kang Feng ◽  
Wai-Yeung Wong ◽  
Ai-Min Ren ◽  
Guijiang Zhou ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Theoretical Investigation ◽  
Main Group ◽  
Emission Color

scholarly journals Tuning Multicolor Emission from a Single Fluorophore via Controlled Radical Polymerization-Mediated Charge Transfer

2020 ◽  
Author(s):  
Suiying Ye ◽  
Tian tian ◽  
Andrew J. Christofferson ◽  
Sofia Erikson ◽  
Jakub Jagielski ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Radical Polymerization ◽  
Molecular Design ◽  
Controlled Radical Polymerization ◽  
General Strategy ◽  
Fundamental Interest ◽  
Solid States ◽  
Emission Color ◽  
Theoretical Investigations ◽  
Practical Implications

<p>Tuning emission color of molecular fluorophores is of fundamental interest as it directly reflects the manipulation of excited states at the quantum-mechanical level. Despite recent progress in molecular design and engineering on single fluorophores, a systematic methodology to obtain multicolor emission in aggregated or solid states, which gives rise to practical implications in different fields, remains scarce. This is due to the complex interplay between the charge-transfer (CT) and singlet excitons. In this study, we present a general strategy to tune the emission color of a single-fluorophore aggregate by controlled radical polymerization-mediated charge transfer. Using a library of well-defined styrenic donor (D) polymers grown from an acceptor (A) fluorophore by atom transfer radical polymerization (ATRP), we found that the solid-state emission color can be fine-tuned by varying three molecular parameters: (i) the monomer substituent, (ii) the end-groups of the polymer, and (iii) the polymer chain length. Experimental and theoretical investigations reveal that the color tunability originates from the structurally dependent through-space charge transfer (TSCT) process that regulates CT energy. We further demonstrate that the polymer systems can be processed into thin films enabling versatile photolithography.</p>

scholarly journals Tuning Multicolor Emission from a Single Fluorophore via Controlled Radical Polymerization-Mediated Charge Transfer

2020 ◽  
Author(s):  
Suiying Ye ◽  
Tian tian ◽  
Andrew J. Christofferson ◽  
Sofia Erikson ◽  
Jakub Jagielski ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Radical Polymerization ◽  
Molecular Design ◽  
Controlled Radical Polymerization ◽  
General Strategy ◽  
Fundamental Interest ◽  
Solid States ◽  
Emission Color ◽  
Theoretical Investigations ◽  
Practical Implications

<p>Tuning emission color of molecular fluorophores is of fundamental interest as it directly reflects the manipulation of excited states at the quantum-mechanical level. Despite recent progress in molecular design and engineering on single fluorophores, a systematic methodology to obtain multicolor emission in aggregated or solid states, which gives rise to practical implications in different fields, remains scarce. This is due to the complex interplay between the charge-transfer (CT) and singlet excitons. In this study, we present a general strategy to tune the emission color of a single-fluorophore aggregate by controlled radical polymerization-mediated charge transfer. Using a library of well-defined styrenic donor (D) polymers grown from an acceptor (A) fluorophore by atom transfer radical polymerization (ATRP), we found that the solid-state emission color can be fine-tuned by varying three molecular parameters: (i) the monomer substituent, (ii) the end-groups of the polymer, and (iii) the polymer chain length. Experimental and theoretical investigations reveal that the color tunability originates from the structurally dependent through-space charge transfer (TSCT) process that regulates CT energy. We further demonstrate that the polymer systems can be processed into thin films enabling versatile photolithography.</p>

scholarly journals Tetraphenylethenyl-Modified 1,8-Naphthalimide Dye with Efficient Aggregation-Enhanced Emisssion, Solvatochromism and Intramolecular Charge Transfer Characteristics

2021 ◽  
Vol 2109 (1) ◽  
pp. 012025
Author(s):  
Qiuli Zhao ◽  
Qinghao Yang
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Quantum Yields ◽  
Transfer Property ◽  
Organic Luminophores ◽  
Emission Color ◽  
High Fluorescence ◽  
Photo Stability ◽  
Chemical Fields ◽  
Naphthalimide Dye

Abstract 1,8-naphthalimide (NI) dyes are one class of important organic luminophores with good photo-stability, high fluorescent quantum yields and broad emission color-tunability, which are widely used in biological and chemical fields. However, they exhibit bad ACQ property, which heavily limits their application in real word. Contrary to ACQ, tetraphenylethene (TPE) is an AIE luminogen. To eliminate the ACQ effect of NI, TPE was used as core and NI chromophores was used as peripheries to obtain a new dye TPEDNI. TPEDNI dye demonstrates typical aggregation-enhanced emission (AEE) characteristic with high fluorescence Φ>F, solid up to 100% in the film state, which is 24 times of that for its THF solution. Besides, TPEDNI exhibits marked solvatochromism, and the emission peak red-shifts from 505 nm in hexane to 610 nm in acetonitrile. TPENI also displays evident intramolecular charge transfer property in THF/water mixtures

Solid emission color tuning of organic charge transfer cocrystals based on planar π-conjugated donors and TCNB

2019 ◽  
Vol 272 ◽  
pp. 96-101 ◽  
Author(s):  
Arshad Khan ◽  
Mei Liu ◽  
Rabia Usman ◽  
Nongyue He ◽  
Rongrong Li ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Color Tuning ◽  
Emission Color

Structure–property studies of P-triarylamine-substituted dithieno[3,2-b:2′,3′-d]phospholes

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93797-93807 ◽  
Author(s):  
Hannes Puntscher ◽  
Paul Kautny ◽  
Berthold Stöger ◽  
Antoine Tissot ◽  
Christian Hametner ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Theoretical Investigation ◽  
Structure Property ◽  
Donor Acceptor

The photo-physical and theoretical investigation of 10 novel donor–acceptor materials sheds new light on charge transfer in dithienophosphole oxide derivatives.

Effect of Intermolecular Interactions on Metal‐to‐Metal Charge Transfer: A Combined Experimental and Theoretical Investigation

2019 ◽  
Vol 131 (47) ◽  
pp. 17165-17171
Author(s):  
Cheng‐Qi Jiao ◽  
Yin‐Shan Meng ◽  
Yang Yu ◽  
Wen‐Jing Jiang ◽  
Wen Wen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intermolecular Interactions ◽  
Theoretical Investigation ◽  
Metal Charge ◽  
Metal Charge Transfer

Towards direct enzyme wiring: a theoretical investigation of charge carrier transfer mechanisms between glucose oxidase and organic semiconductors

2019 ◽  
Vol 21 (6) ◽  
pp. 2968-2976 ◽  
Author(s):  
Gintautas Bagdžiūnas ◽  
Arūnas Ramanavičius
Keyword(s):  
Charge Transfer ◽  
Charge Carrier ◽  
Glucose Oxidase ◽  
Organic Semiconductors ◽  
Theoretical Investigation ◽  
Glucose Biosensors ◽  
Carrier Transfer ◽  
Amperometric Glucose Biosensors ◽  
Transfer Mechanisms

We have evaluated charge transfer between enzyme glucose oxidase (GOx) and organic semiconductors, both of which were applied in the design of amperometric glucose biosensors.

Theoretical investigation of the effects of N-substitution on the photophysical properties of two series of iridium(iii) complexes

2015 ◽  
Vol 39 (4) ◽  
pp. 2588-2595 ◽  
Author(s):  
Xiaohong Shang ◽  
Deming Han ◽  
Qing Zhan ◽  
Defeng Zhou ◽  
Gang Zhang
Keyword(s):  
Quantum Efficiency ◽  
Theoretical Investigation ◽  
Photophysical Properties ◽  
Emission Color

The effects of N-substitution on the photophysical properties of two series of iridium(iii) complexes have been theoretically investigated, which can tune the emission color and enhance the photoluminescence quantum efficiency.

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