Mechanoluminescence or Room‐Temperature Phosphorescence: Molecular Packing‐Dependent Emission Response

2019 ◽  
Vol 58 (48) ◽  
pp. 17297-17302 ◽  
Author(s):  
Jinfeng Wang ◽  
Zhaofei Chai ◽  
Jiaqiang Wang ◽  
Can Wang ◽  
Mengmeng Han ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence

Ultralong Room-Temperature Phosphorescence Remarkably Weakened by Halogenation-Induced Molecular Packing in Hexaphenylmelamine Derivatives

2021 ◽  
Author(s):  
Qiang Guo ◽  
Shiyi Zhou ◽  
Xiaoyu Li ◽  
Li Tao ◽  
Mengke Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence

A series of pure organic halogenated hexaphenylmelamine (HPM) derivatives featuring remarkably weakened ultralong room-temperature phosphorescence (RTP) were meticulously investigated. As the p-substituted atoms of these HPM derivatives sequentially changing from...

scholarly journals Efficient and organic host–guest room-temperature phosphorescence: tunable triplet–singlet crossing and theoretical calculations for molecular packing

2021 ◽  
Author(s):  
Yunxiang Lei ◽  
Junfang Yang ◽  
Wenbo Dai ◽  
Yisha Lan ◽  
Jianhui Yang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Room Temperature ◽  
Molecular Conformation ◽  
Theoretical Calculations ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence ◽  
Dynamics Simulations

Molecular dynamics simulations were used to simulate the molecular conformation and interaction between hosts and guests. This work provides a new concept for the study of molecular packing for the investigation of the luminescence mechanism.

Mechanoluminescence or Room‐Temperature Phosphorescence: Molecular Packing‐Dependent Emission Response

2019 ◽  
Vol 131 (48) ◽  
pp. 17457-17462 ◽  
Author(s):  
Jinfeng Wang ◽  
Zhaofei Chai ◽  
Jiaqiang Wang ◽  
Can Wang ◽  
Mengmeng Han ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence

Three polymorphs of one luminogen: how the molecular packing affects the RTP and AIE properties?

2017 ◽  
Vol 5 (36) ◽  
pp. 9242-9246 ◽  
Author(s):  
Jie Yang ◽  
Zichun Ren ◽  
Bin Chen ◽  
Manman Fang ◽  
Zujin Zhao ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence ◽  
Aggregation Induced Emission

Three crystalline polymorphs of CzS-CN, which display much different properties of room temperature phosphorescence (RTP) and aggregation-induced emission (AIE), are reported.

scholarly journals Abnormal room temperature phosphorescence of purely organic boron-containing compounds: the relationship between the emissive behaviorand the molecular packing, and the potential related applications

2017 ◽  
Vol 8 (12) ◽  
pp. 8336-8344 ◽  
Author(s):  
Zhaofei Chai ◽  
Can Wang ◽  
Jinfeng Wang ◽  
Fan Liu ◽  
Yujun Xie ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence ◽  
Solid States ◽  
Π Stacking ◽  
Rigid Conformation ◽  
The Relationship

Long-lived RT phosphorescence was achieved with a series of organic boron-containing compounds due to the rigid conformation and effective π–π stacking in the solid states.

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>

Sign in / Sign up

Export Citation Format

Share Document