Efficient Triplet–Triplet Annihilation Upconversion with an Anti-Stokes Shift of 1.08 eV Achieved by Chemically Tuning Sensitizers

2019 ◽  
Vol 141 (38) ◽  
pp. 15070-15077 ◽  
Author(s):  
Chunying Fan ◽  
Lingling Wei ◽  
Tong Niu ◽  
Ming Rao ◽  
Guo Cheng ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Anti Stokes ◽  
Triplet Triplet Annihilation

A red thermally activated delayed fluorescence material as a triplet sensitizer for triplet–triplet annihilation up-conversion with high efficiency and low energy loss

2017 ◽  
Vol 5 (48) ◽  
pp. 12674-12677 ◽  
Author(s):  
Danqing Wei ◽  
Fan Ni ◽  
Zece Zhu ◽  
Yang Zou ◽  
Chuluo Yang
Keyword(s):  
Energy Loss ◽  
High Efficiency ◽  
Stokes Shift ◽  
Delayed Fluorescence ◽  
Low Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Fluorescence Material ◽  
Anti Stokes ◽  
Triplet Triplet Annihilation

A red thermally activated delayed fluorecence molecule was employed to realize green-to-blue up-conversion emission with a large anti-Stokes shift and high ΦUC′.

Lanthanide Sensitizers for Large Anti-Stokes Shift Near-Infrared-to-Visible Triplet–Triplet Annihilation Photon Upconversion

2020 ◽  
Vol 11 (7) ◽  
pp. 2477-2481 ◽  
Author(s):  
Natalia Kiseleva ◽  
Pariya Nazari ◽  
Carolin Dee ◽  
Dmitry Busko ◽  
Bryce S. Richards ◽  
...  
Keyword(s):  
Near Infrared ◽  
Stokes Shift ◽  
Anti Stokes ◽  
Annihilation Photon ◽  
Triplet Triplet Annihilation

scholarly journals Triplet-Triplet Annihilation Upconversion with Reversible Emission-Tunability Induced by Chemical-Stimuli: a Remote Modulator for Photocontrol Isomerization

2020 ◽  
Author(s):  
Yaxiong Wei ◽  
Xialei Lv ◽  
Haitao Xian ◽  
Xiaosong Cao ◽  
Chuluo Yang ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Proof Of Concept ◽  
Ph Responsive ◽  
Acceptor Pair ◽  
Color Tunable ◽  
Chemical Stimuli ◽  
Anti Stokes ◽  
First Time ◽  
Further Development ◽  
Triplet Triplet Annihilation

Triplet-triplet annihilation upconversion (TTA-UC) has been widely studied, but color-tunable TTA-UC system triggered by chemical stimuli has not yet been proposed. Herein, reversible acid/base switching of TTA-UC emission wavelength is achieved for the first time by a simple platform, composed of a direct singlet-triplet (S<sub>0</sub>-T<sub>1</sub>) absorpting photosensitizer, and pH-responsive 9,10-di(pyridin-4-yl)anthracene (DPyA) as acceptor. The photosensitizer-acceptor pair exhibits efficient UC emission (quantum yield up to 3.3%, anti-Stokes shift up to 0.92 eV) with remarkable contrast upon base/acid treatment (Δ<i>λ</i><sub>em,max</sub> = 82 nm, 0.46 eV). In a proof-of-concept study, the color-adjustable TTA-UC emission was applied as a remote modulator to photo-control reversible chemical reactions for the first time. This platform enriches the portfolio of color-switchable TTA-UC, and the mechanism would inspire further development of smart UC systems and extend the application field of upconversion.

Truxene-bridged Bodipy fullerene tetrads without precious metals: study of the energy transfer and application in triplet–triplet annihilation upconversion

2020 ◽  
Vol 8 (44) ◽  
pp. 15839-15851
Author(s):  
Yuanyuan Che ◽  
Xuemei Yuan ◽  
Lei Sun ◽  
Haijun Xu ◽  
Xiaoyu Zhao ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Absorption Band ◽  
Stokes Shift ◽  
Precious Metals ◽  
Anti Stokes ◽  
Triplet Triplet Annihilation

Truxene-bridged fullerene, Zn–porphyrin and Bodipy tetrad was prepared which have wider absorption band, and used as triplet PS for two-color excitable triplet–triplet annihilation upconversion, with an large anti-Stokes shift of 4074 cm−1.

scholarly journals Triplet-Triplet Annihilation Upconversion with Reversible Emission-Tunability Induced by Chemical-Stimuli: a Remote Modulator for Photocontrol Isomerization

2020 ◽  
Author(s):  
Yaxiong Wei ◽  
Xialei Lv ◽  
Haitao Xian ◽  
Xiaosong Cao ◽  
Chuluo Yang ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Proof Of Concept ◽  
Ph Responsive ◽  
Acceptor Pair ◽  
Color Tunable ◽  
Chemical Stimuli ◽  
Anti Stokes ◽  
First Time ◽  
Further Development ◽  
Triplet Triplet Annihilation

Triplet-triplet annihilation upconversion (TTA-UC) has been widely studied, but color-tunable TTA-UC system triggered by chemical stimuli has not yet been proposed. Herein, reversible acid/base switching of TTA-UC emission wavelength is achieved for the first time by a simple platform, composed of a direct singlet-triplet (S<sub>0</sub>-T<sub>1</sub>) absorpting photosensitizer, and pH-responsive 9,10-di(pyridin-4-yl)anthracene (DPyA) as acceptor. The photosensitizer-acceptor pair exhibits efficient UC emission (quantum yield up to 3.3%, anti-Stokes shift up to 0.92 eV) with remarkable contrast upon base/acid treatment (Δ<i>λ</i><sub>em,max</sub> = 82 nm, 0.46 eV). In a proof-of-concept study, the color-adjustable TTA-UC emission was applied as a remote modulator to photo-control reversible chemical reactions for the first time. This platform enriches the portfolio of color-switchable TTA-UC, and the mechanism would inspire further development of smart UC systems and extend the application field of upconversion.

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