scholarly journals Clustering and Halogen Effects Enabled Red/Near-Infrared Room Temperature Phosphorescence from Aliphatic Cyclic Imides

2021 ◽  
Author(s):  
Tianwen Zhu ◽  
Tianjia Yang ◽  
Qiang Zhang ◽  
Wang Zhang Yuan
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Electron Delocalization ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Heavy Atoms ◽  
Cyclic Imides ◽  
Rational Construction ◽  
Molecular Clustering ◽  
The Way

<a>Pure organics with room temperature phosphorescence (RTP) are urgently demanded in advanced optoelectronic and bioelectronic applications. However, currently reported phosphors are mostly aromatics and restricted to blue to orange colors. It remains an enormous challenge to achieve red and near-infrared (NIR) RTP, particularly for those from nonaromatics. Here we demonstrate a series of cyclic imides derived from succinimide, which can emit red (665, 690 nm) and even NIR (745 nm) RTP with outstanding efficiencies of up to 9.2%, despite their rather limited molecular conjugations. Such unique emission should be ascribed to the presence of the imide unit and heavy atoms, effective molecular clustering, and the electron delocalization of halogens, which not only greatly facilitate intersystem crossing, but also afford significantly extended through-space conjugation and rigidified conformations.</a> These results pave the way to the rational construction of red and NIR nonconventional luminophores through synergistic clustering and halogen effects.

scholarly journals Clustering and Halogen Effects Enabled Red/Near-Infrared Room Temperature Phosphorescence from Aliphatic Cyclic Imides

2021 ◽  
Author(s):  
Tianwen Zhu ◽  
Tianjia Yang ◽  
Qiang Zhang ◽  
Wang Zhang Yuan
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Electron Delocalization ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Heavy Atoms ◽  
Cyclic Imides ◽  
Rational Construction ◽  
Molecular Clustering ◽  
The Way

<a>Pure organics with room temperature phosphorescence (RTP) are urgently demanded in advanced optoelectronic and bioelectronic applications. However, currently reported phosphors are mostly aromatics and restricted to blue to orange colors. It remains an enormous challenge to achieve red and near-infrared (NIR) RTP, particularly for those from nonaromatics. Here we demonstrate a series of cyclic imides derived from succinimide, which can emit red (665, 690 nm) and even NIR (745 nm) RTP with outstanding efficiencies of up to 9.2%, despite their rather limited molecular conjugations. Such unique emission should be ascribed to the presence of the imide unit and heavy atoms, effective molecular clustering, and the electron delocalization of halogens, which not only greatly facilitate intersystem crossing, but also afford significantly extended through-space conjugation and rigidified conformations.</a> These results pave the way to the rational construction of red and NIR nonconventional luminophores through synergistic clustering and halogen effects.

scholarly journals Clustering and Halogen Effects Enabled Red/Near-Infrared Room Temperature Phosphorescence from Aliphatic Cyclic Imides

2021 ◽  
Author(s):  
Tianwen Zhu ◽  
Tianjia Yang ◽  
Qiang Zhang ◽  
Wang Zhang Yuan
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Electron Delocalization ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Heavy Atoms ◽  
Cyclic Imides ◽  
Rational Construction ◽  
Molecular Clustering ◽  
The Way

<a>Pure organics with room temperature phosphorescence (RTP) are urgently demanded in advanced optoelectronic and bioelectronic applications. However, currently reported phosphors are mostly aromatics and restricted to blue to orange colors. It remains an enormous challenge to achieve red and near-infrared (NIR) RTP, particularly for those from nonaromatics. Here we demonstrate a series of cyclic imides derived from succinimide, which can emit red (665, 690 nm) and even NIR (745 nm) RTP with outstanding efficiencies of up to 9.2%, despite their rather limited molecular conjugations. Such unique emission should be ascribed to the presence of the imide unit and heavy atoms, effective molecular clustering, and the electron delocalization of halogens, which not only greatly facilitate intersystem crossing, but also afford significantly extended through-space conjugation and rigidified conformations.</a> These results pave the way to the rational construction of red and NIR nonconventional luminophores through synergistic clustering and halogen effects.

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>

Enhanced room-temperature phosphorescence of triphenylphosphine derivatives without metal and heavy atoms in their crystal phase

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51683-51686 ◽  
Author(s):  
Pengchong Xue ◽  
Panpan Wang ◽  
Peng Chen ◽  
Jipeng Ding ◽  
Ran Lu
Keyword(s):  
Room Temperature ◽  
Crystal Phase ◽  
Room Temperature Phosphorescence ◽  
Heavy Atoms

Two simple triphenylphosphine derivatives have weak phosphorescence in solution, but the emissions were enhanced by 6.5 and 27 times, respectively, in crystals.

scholarly journals Near-Infrared-Excitable Organic Ultralong Phosphorescence through Multiphoton Absorption

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Ye Tao ◽  
Lele Tang ◽  
Qi Wei ◽  
Jibiao Jin ◽  
Wenbo Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Emission Feature ◽  
Multiphoton Absorption ◽  
Triplet Excited State ◽  
Room Temperature Phosphorescence ◽  
Two Photon ◽  
Nir Light ◽  
Phosphorescence Quantum Yield ◽  
Novel Applications

Organic ultralong room-temperature phosphorescence (OURTP) with a long-lived triplet excited state up to several seconds has triggered widespread research interests, but most OURTP materials are excited by only ultraviolet (UV) or blue light owing to their unique stabilized triplet- and solid-state emission feature. Here, we demonstrate that near-infrared- (NIR-) excitable OURTP molecules can be rationally designed by implanting intra/intermolecular charge transfer (CT) characteristics into H-aggregation to stimulate the efficient nonlinear multiphoton absorption (MPA). The resultant upconverted MPA-OURTP show ultralong lifetimes over 0.42 s and a phosphorescence quantum yield of ~37% under both UV and NIR light irradiation. Empowered by the extraordinary MPA-OURTP, novel applications including two-photon bioimaging, visual laser power detection and excitation, and lifetime multiplexing encryption devices were successfully realized. These discoveries illustrate not only a delicate design map for the construction of NIR-excitable OURTP materials but also insightful guidance for exploring OURTP-based nonlinear optoelectronic properties and applications.

Activating Intersystem Crossing and Aggregation Coupling by CN-Substitution for Efficient Organic Ultralong Room Temperature Phosphorescence

2020 ◽  
Vol 124 (18) ◽  
pp. 10129-10134
Author(s):  
Jie Yuan ◽  
Yongrong Wang ◽  
Ling Li ◽  
Shuang Wang ◽  
Xingxing Tang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence

Room‐Temperature Phosphorescence Resonance Energy Transfer for Construction of Near‐Infrared Afterglow Imaging Agents

2020 ◽  
Vol 32 (52) ◽  
pp. 2006752
Author(s):  
Qianxi Dang ◽  
Yuyan Jiang ◽  
Jinfeng Wang ◽  
Jiaqiang Wang ◽  
Qunhua Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Room Temperature ◽  
Near Infrared ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Imaging Agents ◽  
Room Temperature Phosphorescence

scholarly journals Ultralong room-temperature phosphorescence of a solid-state supramolecule between phenylmethylpyridinium and cucurbit[6]uril

2019 ◽  
Vol 10 (33) ◽  
pp. 7773-7778 ◽  
Author(s):  
Zhi-Yuan Zhang ◽  
Yu Liu
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Data Encryption ◽  
Intersystem Crossing ◽  
Nonradiative Relaxation ◽  
Room Temperature Phosphorescence

We report an ultralong room-temperature phosphorescence (2.62 s) based on cucurbit[6]uril host and phenyl-methyl-pyridinium guest for data encryption. Encapsulation of CB[6] boosts intersystem crossing and suppresses nonradiative relaxation of guest.

Sign in / Sign up

Export Citation Format

Share Document