How the Molecular Packing Affects the Room Temperature Phosphorescence in Pure Organic Compounds: Ingenious Molecular Design, Detailed Crystal Analysis, and Rational Theoretical Calculations

2017 ◽  
Vol 29 (17) ◽  
pp. 1606829 ◽  
Author(s):  
Yujun Xie ◽  
Yuwei Ge ◽  
Qian Peng ◽  
Conggang Li ◽  
Qianqian Li ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Room Temperature ◽  
Molecular Design ◽  
Theoretical Calculations ◽  
Molecular Packing ◽  
Room Temperature Phosphorescence

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.

scholarly journals The development of mechanoluminescence from organic compounds: breakthrough and deep insight

2020 ◽  
Vol 4 (2) ◽  
pp. 317-331 ◽  
Author(s):  
Yujun Xie ◽  
Zhen Li
Keyword(s):  
Organic Compounds ◽  
Room Temperature ◽  
Crack Surface ◽  
Deep Insight ◽  
Room Temperature Phosphorescence

The organic mechanoluminescence (ML) happens at the crack surface under force, and the ML composition is becoming more complicated, extending from the normal fluorescence to phosphorescence, persistent room temperature phosphorescence and the photo-sensitive ML.

Invoking ultralong room temperature phosphorescence of purely organic compounds through H-aggregation engineering

2019 ◽  
Vol 6 (6) ◽  
pp. 1259-1264 ◽  
Author(s):  
Jie Yuan ◽  
Shuang Wang ◽  
Yu Ji ◽  
Runfeng Chen ◽  
Qi Zhu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Organic Compounds ◽  
Room Temperature ◽  
Reversed Phase ◽  
Room Temperature Phosphorescence ◽  
Dark State ◽  
Thermally Activated ◽  
Splitting Energy ◽  
Allowed State

Splitting energy (Δε)-controlled thermally activated reversed phase transformation from the low-lying dark state to the high-lying transition-allowed state of H-aggregation plays a key role in the organic ultralong 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 Crystallization-induced room-temperature phosphorescence in fumaramides

CrystEngComm ◽  
2020 ◽  
Vol 22 (45) ◽  
pp. 7782-7785
Author(s):  
Andrea Nitti ◽  
Chiara Botta ◽  
Alessandra Forni ◽  
Elena Cariati ◽  
Elena Lucenti ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Molecular Design ◽  
Halogen Bonding ◽  
Room Temperature Phosphorescence

Novel fumaramides exhibit room-temperature phosphorescence in the solid state once molecular design and positioning of the carbonyl and bromine atoms allow for the formation of strong intermolecular halogen bonding interactions.

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

scholarly journals The Importance of Molecular Motion to Luminescence in Solid State

2020 ◽  
Author(s):  
Yujie Tu ◽  
Junkai Liu ◽  
Xuepeng Zhang ◽  
Tsz Shing Cheung ◽  
Xuewen He ◽  
...  
Keyword(s):  
Solid State ◽  
Photothermal Therapy ◽  
Room Temperature ◽  
Molecular Motion ◽  
Molecular Design ◽  
Acid Group ◽  
Carboxylic Acid Group ◽  
Room Temperature Phosphorescence ◽  
Model Compounds ◽  
Substituted Benzoic Acids

<div>Molecular motion is often considered detrimental to luminescence because it favors nonradiative decay. However, nothing is absolute, and molecular motion can also do useful work if utilized properly. For example, photothermal therapy makes use of the heat generated in light irradiation for cancer treatment. To further explore the merits of molecular motion, ortho-substituted benzoic acids were used as model compounds to evaluate the importance of molecular motion to luminescence in the solid state. It is verified that the twisting of the carboxylic acid group can activate spin vibronic coupling to facilitate intersystem crossing to result in more efficient room temperature phosphorescence (RTP). A five-state model is established to understand the ISC process and an effective pre-twisted molecular design strategy is put forward for the development of efficient RTP materials.</div>

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