scholarly journals Barbituric Derivative Nanoaggregates with Aggregation-Induced Emission and Mechanofluorochromism

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Xi Su ◽  
Hanjun Zhang ◽  
Kaiyue You ◽  
Hua Wang ◽  
Yuezhi Cui ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Steric Effect ◽  
Light Emission ◽  
Intramolecular Charge Transfer ◽  
Theoretical Calculations ◽  
Red Light ◽  
Spectral Analyses ◽  
Aggregation Induced Emission ◽  
Conjugated Compounds

Three new nonplanar barbituric derivatives, named as TTB, TTTB, and TOB, were synthesized. The D-π-A type conjugated compounds showed obvious intramolecular charge transfer (ICT) property, which was evidenced by theoretical calculations and spectral analyses. All of them exhibited aggregation induced emission (AIE) when formed nanoaggregates. These nanoaggregates also showed reversible mechanofluorochromism (MFC). Their red light emission became deep red after grinding and then recovered with dichloromethane fuming. Hence, a strategy to fabricate mechanofluorochromic nanoaggregate phosphors via nonplanar π-skeleton and steric effect was demonstrated, and these nanophosphors possess potentials for mechanosensors and anticounterfeiting technology.

Light emission properties and self-assembly of a tolane-based luminogen

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38690-38695 ◽  
Author(s):  
Ying Zang ◽  
Yi Li ◽  
Baozong Li ◽  
Hongkun Li ◽  
Yonggang Yang
Keyword(s):  
Charge Transfer ◽  
Self Assembly ◽  
Light Emission ◽  
Intramolecular Charge Transfer ◽  
Aggregation Induced Emission ◽  
Emission Properties

Fluorescent micro/nanostructures were formed by self-assembly of a tolane derivative with intramolecular charge transfer and aggregation-induced emission properties.

scholarly journals Excitation energy-dependent photocurrent switching in a single-molecule photodiode

2019 ◽  
Vol 116 (33) ◽  
pp. 16198-16203 ◽  
Author(s):  
Bing Shan ◽  
Animesh Nayak ◽  
Olivia F. Williams ◽  
Dillon C. Yost ◽  
Nicholas F. Polizzi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Molecule ◽  
Indium Tin Oxide ◽  
Flash Photolysis ◽  
Theoretical Calculations ◽  
Electron Flow ◽  
Red Light ◽  
Excitation Frequency ◽  
Frequency Dependent ◽  
Oxide Electrodes

The direction of electron flow in molecular optoelectronic devices is dictated by charge transfer between a molecular excited state and an underlying conductor or semiconductor. For those devices, controlling the direction and reversibility of electron flow is a major challenge. We describe here a single-molecule photodiode. It is based on an internally conjugated, bichromophoric dyad with chemically linked (porphyrinato)zinc(II) and bis(terpyridyl)ruthenium(II) groups. On nanocrystalline, degenerately doped indium tin oxide electrodes, the dyad exhibits distinct frequency-dependent, charge-transfer characters. Variations in the light source between red-light (∼1.9 eV) and blue-light (∼2.7 eV) excitation for the integrated photodiode result in switching of photocurrents between cathodic and anodic. The origin of the excitation frequency-dependent photocurrents lies in the electronic structure of the chromophore excited states, as shown by the results of theoretical calculations, laser flash photolysis, and steady-state spectrophotometric measurements.

scholarly journals N-Substitution of acridone with electron-donating groups: crystal packing, intramolecular charge transfer and tuneable aggregation induced emission

RSC Advances ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 7092-7098 ◽  
Author(s):  
Renfei Liu ◽  
Guanxing Zhu ◽  
Gang Zhang
Keyword(s):  
Charge Transfer ◽  
Transfer Process ◽  
Intramolecular Charge Transfer ◽  
Crystal Packing ◽  
Charge Transfer Process ◽  
Aggregation Induced Emission ◽  
Donor Acceptor ◽  
Electron Donating Groups

Triphenylamine functionalized acridone leads to a donor–acceptor system with intramolecular charge transfer process and tuneable aggregation induced enhanced emission.

Amorphous and crystalline blends from polytyrosine and pyridine-functionalized anthracene: hydrogen-bond interactions, conformations, intramolecular charge transfer and aggregation-induced emission

2014 ◽  
Vol 5 (19) ◽  
pp. 5765-5774 ◽  
Author(s):  
Ke-Ying Shih ◽  
Yung-Chih Lin ◽  
Tai-Shen Hsiao ◽  
Shiang-Lin Deng ◽  
Shiao-Wei Kuo ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Hydrogen Bond Interactions ◽  
Vinyl Pyridine

A new pyridine-terminated fluorophore of (E)-4-(2-(anthracen-9-yl)vinyl)pyridine (AnPy) with intramolecular charge transfer and aggregation-induced emission properties was synthesized and was blended with polytyrosine (PTyr) through hydrogen-bond interactions.

Utilising tetraphenylethene as a dual activator for intramolecular charge transfer and aggregation induced emission

2012 ◽  
Vol 48 (62) ◽  
pp. 7711 ◽  
Author(s):  
Guo-Feng Zhang ◽  
Matthew P. Aldred ◽  
Wen-Liang Gong ◽  
Chong Li ◽  
Ming-Qiang Zhu
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Aggregation Induced Emission

Efficient and thermally stable non-doped red OLEDs based on a “bird-like” donor–acceptor fluorophore with aggregation induced emission enhancement and intramolecular charge transfer

2017 ◽  
Vol 5 (30) ◽  
pp. 7436-7440 ◽  
Author(s):  
Ezhakudiyan Ravindran ◽  
Narayanasastri Somanathan
Keyword(s):  
Charge Transfer ◽  
Rational Design ◽  
Intramolecular Charge Transfer ◽  
Thermally Stable ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Donor Acceptor ◽  
Red Oleds

The rational design of an efficient and thermally stable non-doped red fluorophore material with tunable AIEE and ICT characteristics triggers enhanced OLED performances.

Towards white-light emission of fluorescent polymeric nanoparticles with a single luminogen possessing AIE and TICT properties

2020 ◽  
Vol 8 (2) ◽  
pp. 734-741 ◽  
Author(s):  
Yaxin Hu ◽  
Xiaoqin Liang ◽  
Dongliang Wu ◽  
Bang Yu ◽  
Yijia Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
White Light ◽  
Light Emission ◽  
Intramolecular Charge Transfer ◽  
Polymeric Nanoparticles ◽  
White Light Emission ◽  
Twisted Intramolecular Charge Transfer ◽  
Light Emitting ◽  
Transfer Properties

White-light-emitting AIE-PNPs were facilely and efficiently prepared through miniemulsion copolymerization by using an AIE luminogen with twisted intramolecular charge transfer properties as a single emitting component.

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