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

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.

One-dimensional π–π stacking induces highly efficient pure organic room-temperature phosphorescence and ternary-emission single-molecule white light

2019 ◽  
Vol 7 (40) ◽  
pp. 12502-12508 ◽  
Author(s):  
Yating Wen ◽  
Haichao Liu ◽  
Shitong Zhang ◽  
Yu Gao ◽  
Yan Yan ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Room Temperature ◽  
High Efficiency ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
One Dimensional ◽  
Highly Efficient ◽  
Π Stacking ◽  
Radiative Rate

High-efficiency RTP of TX-Cl crystal was induced by one-dimensional π–π stacking, which significantly enhances both intersystem crossing (S1 → Tn) and radiative rate (T1 → S0). SMWLE was harvested by precisely controlling aggregating degree.

scholarly journals Using Room Temperature Phosphorescence of Gold(I) Complexes for PAHs Sensing

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2444
Author(s):  
Marian Rosental ◽  
Richard N. Coldman ◽  
Artur J. Moro ◽  
Inmaculada Angurell ◽  
Rosa M. Gomila ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Triplet State ◽  
Aromatic Hydrocarbons ◽  
Room Temperature ◽  
Dft Calculation ◽  
Heavy Atom ◽  
Luminescent Properties ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Polycyclic Aromatic

The synthesis of two new phosphane-gold(I)–napthalimide complexes has been performed and characterized. The compounds present luminescent properties with denoted room temperature phosphorescence (RTP) induced by the proximity of the gold(I) heavy atom that favors intersystem crossing and triplet state population. The emissive properties of the compounds together with the planarity of their chromophore were used to investigate their potential as hosts in the molecular recognition of different polycyclic aromatic hydrocarbons (PAHs). Naphthalene, anthracene, phenanthrene, and pyrene were chosen to evaluate how the size and electronic properties can affect the host:guest interactions. Stronger affinity has been detected through emission titrations for the PAHs with extended aromaticity (anthracene and pyrene) and the results have been supported by DFT calculation studies.

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.

scholarly journals Controlling ultralong room temperature phosphorescence in organic compounds with sulfur oxidation state

2021 ◽  
Vol 12 (1) ◽  
pp. 188-195
Author(s):  
Zhen Xu ◽  
Clàudia Climent ◽  
Christopher M. Brown ◽  
Duane Hean ◽  
Christopher J. Bardeen ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Oxidation State ◽  
Room Temperature ◽  
Sulfur Oxidation ◽  
Intersystem Crossing ◽  
Room Temperature Phosphorescence ◽  
Lone Pairs ◽  
Orbital Mixing

Sulfur lone pairs in bridged dimers enhance intersystem crossing and phosphorescence through orbital mixing and electrostatic screening.

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