One-step preparation of silica microspheres with super-stable ultralong room temperature phosphorescence

2019 ◽  
Vol 7 (28) ◽  
pp. 8680-8687 ◽  
Author(s):  
Guoqiang Tang ◽  
Kai Zhang ◽  
Tanglue Feng ◽  
Songyuan Tao ◽  
Mei Han ◽  
...  
Keyword(s):  
Room Temperature ◽  
Silica Microspheres ◽  
Room Temperature Phosphorescence ◽  
Polymer Dots ◽  
One Step

Carbonized polymer dots embedded in SiO2 microspheres with super-stable ultralong room temperature phosphorescence were prepared via a one-step strategy.

Hydrothermal Addition Polymerization for Ultrahigh-Yield Carbonized Polymer Dots with Room Temperature Phosphorescence via Nanocomposite

2018 ◽  
Vol 24 (44) ◽  
pp. 11303-11308 ◽  
Author(s):  
Chunlei Xia ◽  
Songyuan Tao ◽  
Shoujun Zhu ◽  
Yubin Song ◽  
Tanglue Feng ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Addition Polymerization ◽  
Polymer Dots

Carbonized Polymer Dots with Tunable Room-Temperature Phosphorescence Lifetime and Wavelength

2020 ◽  
Vol 12 (34) ◽  
pp. 38593-38601 ◽  
Author(s):  
Chunlei Xia ◽  
Shoujun Zhu ◽  
Shi-Tong Zhang ◽  
Qingsen Zeng ◽  
Songyuan Tao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Phosphorescence Lifetime ◽  
Polymer Dots

Ultralong-lived room temperature phosphorescence from N and P codoped self-protective carbonized polymer dots for confidential information encryption and decryption

2021 ◽  
Vol 9 (14) ◽  
pp. 4847-4853
Author(s):  
Zifei Wang ◽  
Jian Shen ◽  
Jiazhen Sun ◽  
Bin Xu ◽  
Zhenhua Gao ◽  
...  
Keyword(s):  
Information Security ◽  
Decay Time ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Confidential Information ◽  
Carbon Dot ◽  
Polymer Dots ◽  
Encryption And Decryption

N and P codoped carbonized polymer dots (NP-CPDs) exhibit a relatively long RTP decay time over 23 s among most carbon dot-based RTP materials reported thus far. Such NP-CPDs are applied to illustrate applications in information security.

One-step synthesis of cyclic compounds towards easy room-temperature phosphorescence and deep blue thermally activated delayed fluorescence

2018 ◽  
Vol 54 (56) ◽  
pp. 7850-7853 ◽  
Author(s):  
Yingyuan Hu ◽  
Zhenfeng Wang ◽  
Xiaofang Jiang ◽  
Xinyi Cai ◽  
Shi-Jian Su ◽  
...  
Keyword(s):  
Room Temperature ◽  
Delayed Fluorescence ◽  
Room Temperature Phosphorescence ◽  
One Pot ◽  
Dual Emission ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Deep Blue ◽  
One Step ◽  
Cyclic Compounds

Novel cyclic compounds were synthesized by one-pot synthesis and THF-irrigating purification with deep blue thermally activated delayed fluorescence and room-temperature phosphorescence dual emission.

DNA Inspirited Rational Construction of Nonconventional Luminophores with Efficient and Color-Tunable Afterglow

2020 ◽  
Author(s):  
Yunzhong Wang ◽  
Saixing Tang ◽  
Yating Wen ◽  
Shuyuan Zheng ◽  
Bing Yang ◽  
...  
Keyword(s):  
Rational Design ◽  
Room Temperature ◽  
Double Helix ◽  
Mechanical Grinding ◽  
Room Temperature Phosphorescence ◽  
Color Tunable ◽  
Potential Applications ◽  
Rational Construction ◽  
Double Helix Structure ◽  
Made In

<div>Persistent room-temperature phosphorescence (p-RTP) from pure organics is attractive </div><div>due to its fundamental importance and potential applications in molecular imaging, </div><div>sensing, encryption, anticounterfeiting, etc.1-4 Recently, efforts have been also made in </div><div>obtaining color-tunable p-RTP in aromatic phosphors5 and nonconjugated polymers6,7. </div><div>The origin of color-tunable p-RTP and the rational design of such luminogens, </div><div>particularly those with explicit structure and molecular packing, remain challenging. </div><div>Noteworthily, nonconventional luminophores without significant conjugations generally </div><div>possess excitation-dependent photoluminescence (PL) because of the coexistence of </div><div>diverse clustered chromophores6,8, which strongly implicates the possibility to achieve </div><div>color-tunable p-RTP from their molecular crystals assisted by effective intermolecular </div><div>interactions. Here, inspirited by the highly stable double-helix structure and multiple </div><div>hydrogen bonds in DNA, we reported a series of nonconventional luminophores based on </div><div>hydantoin (HA), which demonstrate excitation-dependent PL and color-tunable p-RTP </div><div>from sky-blue to yellowish-green, accompanying unprecedentedly high PL and p-RTP </div><div>efficiencies of up to 87.5% and 21.8%, respectively. Meanwhile, the p-RTP emissions are </div><div>resistant to vigorous mechanical grinding, with lifetimes of up to 1.74 s. Such robust, </div><div>color-tunable and highly efficient p-RTP render the luminophores promising for varying </div><div>applications. These findings provide mechanism insights into the origin of color-tunable </div><div>p-RTP, and surely advance the exploitation of efficient nonconventional luminophores.</div>

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>

A Study on the Rearrangement of Dialkyl 1-Aryl-1-hydroxymethylphosphonates to Benzyl Phosphates

2020 ◽  
Vol 24 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Zita Rádai ◽  
Réka Szabó ◽  
Áron Szigetvári ◽  
Nóra Zsuzsa Kiss ◽  
Zoltán Mucsi ◽  
...  
Keyword(s):  
Quantum Chemical ◽  
Room Temperature ◽  
Phase Transfer ◽  
One Pot ◽  
Substrate Dependence ◽  
Triethylbenzylammonium Chloride ◽  
One Step ◽  
The Pudovik Reaction ◽  
The One ◽  
Solid Liquid

The phospha-Brook rearrangement of dialkyl 1-aryl-1-hydroxymethylphosphonates (HPs) to the corresponding benzyl phosphates (BPs) has been elaborated under solid-liquid phase transfer catalytic conditions. The best procedure involved the use of triethylbenzylammonium chloride as the catalyst and Cs2CO3 as the base in acetonitrile as the solvent at room temperature. The substrate dependence of the rearrangement has been studied, and the mechanism of the transformation under discussion was explored by quantum chemical calculations. The key intermediate is an oxaphosphirane. The one-pot version starting with the Pudovik reaction has also been developed. The conditions of this tandem transformation were the same, as those for the one-step HP→BP conversion.

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