Spin–Orbit Charge-Transfer Intersystem Crossing (SOCT-ISC) in Bodipy-Phenoxazine Dyads: Effect of Chromophore Orientation and Conformation Restriction on the Photophysical Properties

2019 ◽  
Vol 123 (37) ◽  
pp. 22793-22811 ◽  
Author(s):  
Yu Dong ◽  
Andrey A. Sukhanov ◽  
Jianzhang Zhao ◽  
Ayhan Elmali ◽  
Xiaolian Li ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photophysical Properties ◽  
Intersystem Crossing ◽  
Spin Orbit

Carbazole-perylenebisimide electron donor/acceptor dyads showing efficient spin orbit charge transfer intersystem crossing (SOCT-ISC) and photo-driven intermolecular electron transfer

2020 ◽  
Vol 8 (14) ◽  
pp. 4701-4712 ◽  
Author(s):  
Noreen Rehmat ◽  
Antonio Toffoletti ◽  
Zafar Mahmood ◽  
Xue Zhang ◽  
Jianzhang Zhao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Electron Donor ◽  
Intersystem Crossing ◽  
Spin Orbit ◽  
Intermolecular Electron Transfer ◽  
Donor Acceptor

An efficient spin orbit charge transfer intersystem crossing (SOCT-ISC) was demonstrated in non-orthogonal compact carbazole-perylenebisimide electron donor/acceptor dyads.

Electronic Coupling and Spin–Orbit Charge-Transfer Intersystem Crossing in Phenothiazine–Perylene Compact Electron Donor/Acceptor Dyads

2019 ◽  
Vol 123 (12) ◽  
pp. 7010-7024 ◽  
Author(s):  
Muhammad Imran ◽  
Andrey A. Sukhanov ◽  
Zhijia Wang ◽  
Ahmet Karatay ◽  
Jianzhang Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Electronic Coupling ◽  
Intersystem Crossing ◽  
Spin Orbit ◽  
Donor Acceptor

scholarly journals Development of fluorinated benzils and bisbenzils as room-temperature phosphorescent molecules

2020 ◽  
Vol 16 ◽  
pp. 1154-1162 ◽  
Author(s):  
Shigeyuki Yamada ◽  
Takuya Higashida ◽  
Yizhou Wang ◽  
Masato Morita ◽  
Takuya Hosokai ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complex ◽  
Room Temperature ◽  
Transition Metal Complex ◽  
Photophysical Properties ◽  
Intersystem Crossing ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Design Synthesis ◽  
Catalyzed Oxidation

Pure organic phosphorescent molecules are attractive alternatives to transition-metal-complex-based phosphores for biomedical and technological applications owing to their abundance and nontoxicity. This article discloses the design, synthesis, and photophysical properties of fluorinated benzil and bisbenzil derivatives as potential pure organic room-temperature phosphorescent molecules. These compounds were separately converted from the corresponding fluorinated bistolanes via PdCl2-catalyzed oxidation by dimethyl sulfoxide, while nonfluorinated bistolane provided the corresponding bisbenzil derivatives exclusively in a similar manner. Intensive investigations of the photophysical properties of the benzil and bisbenzil derivatives in toluene at 25 °C showed both fluorescence with a photoluminescence (PL) band at a maximum wavelength (λPL) of around 400 nm and phosphorescence with a PL band at a λPL of around 560 nm. Interestingly, intersystem crossing effectively caused fluorinated benzils to emit phosphorescence, which may arise from immediate spin-orbit coupling involving the 1(n, π)→3(π, π) transition, unlike the case of fluorinated or nonfluorinated bisbenzil analogues. These findings offer a useful guide for developing novel pure organic room-temperature phosphorescent materials.

scholarly journals Development of fluorinated benzils and bisbenzils as room-temperature phosphorescent molecules

2020 ◽  
Author(s):  
Shigeyuki Yamada ◽  
Takuya Higashida ◽  
Yizhou Wang ◽  
Masato Morita ◽  
Takuya Hosokai ◽  
...  
Keyword(s):  
Transition Metal Complexes ◽  
Room Temperature ◽  
Photophysical Properties ◽  
Photophysical Property ◽  
Intersystem Crossing ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Design Synthesis ◽  
Intensive Investigation ◽  
Catalyzed Oxidation

Pure organic phosphorescent molecules are attractive alternatives to transition metal complexes-based phosphores for biomedical and technological applications owing to their abundance and nontoxicity. This article discloses the design, synthesis, and photophysical property of fluorinated benzil and bisbenzil derivatives as potential pure organic room-temperature phosphorescent molecules. These compounds were separately converted from the corresponding fluorinated bistolanes via PdCl2-catalyzed oxidation by dimethyl sulfoxide, while non-fluorinated bistolane provided the corresponding bisbenzil derivatives exclusively in a similar manner. Intensive investigation of the photophysical properties of the benzil and bisbenzil derivatives in toluene at 25 °C showed both fluorescence with a photoluminescence (PL) band at a maximum wavelength (λPL) of around 400 nm and phosphorescence with a PL band at a λPL of around 560 nm. Interestingly, intersystem crossing effectively caused fluorinated benzils to emit phosphorescence, which may be due to immediate spin-orbit coupling involving the 1(n, π)→3(π, π) transition, unlike the case of fluorinated or non-fluorinated bisbenzil analogues. These findings would become useful tool to develop novel pure organic room-temperature phosphorescent materials.

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