Metal‐Free Organic Luminophores That Exhibit Dual Fluorescence and Phosphorescence Emission at Room Temperature

ChemPlusChem ◽  
2021 ◽  
Author(s):  
Masaki Shimizu ◽  
Tsuneaki Sakurai
Keyword(s):  
Room Temperature ◽  
Dual Fluorescence ◽  
Metal Free ◽  
Organic Luminophores ◽  
Phosphorescence Emission ◽  
Fluorescence And Phosphorescence

A colorless semi-aromatic polyimide derived from a sterically hindered bromine-substituted dianhydride exhibiting dual fluorescence and phosphorescence emission

2019 ◽  
Vol 3 (1) ◽  
pp. 39-49 ◽  
Author(s):  
Kenta Kanosue ◽  
Shuzo Hirata ◽  
Martin Vacha ◽  
Ramūnas Augulis ◽  
Vidmantas Gulbinas ◽  
...  
Keyword(s):  
Polyimide Film ◽  
Thermally Stable ◽  
Dual Fluorescence ◽  
Aromatic Polyimide ◽  
Phosphorescence Emission ◽  
Sterically Hindered ◽  
Fluorescence And Phosphorescence

A colorless and thermally stable polyimide film exhibiting dual fluorescence and phosphorescence emission promising for solar spectral down-converters.

scholarly journals Dual ligand-based fluorescence and phosphorescence emission at room temperature from platinum thioxanthonyl complexes

2015 ◽  
Vol 44 (9) ◽  
pp. 3974-3987 ◽  
Author(s):  
Fabian Geist ◽  
Andrej Jackel ◽  
Rainer F. Winter
Keyword(s):  
Room Temperature ◽  
Platinum Complexes ◽  
Quantum Yields ◽  
Fluid Solution ◽  
Phosphorescence Emission ◽  
Fluorescence And Phosphorescence

Platinum complexes with σ-bonded thioxanthonyl (Tx) ligands exhibit, on irradiation into the Tx π→π* band, dual Tx-based fluorescence and phosphorescence emission with phosphorescence quantum yields of up to 19% in fluid solution at room temperature.

Use of silylmethoxy groups as inducers of efficient room temperature phosphorescence from precious-metal-free organic luminophores

2018 ◽  
Vol 2 (2) ◽  
pp. 347-354 ◽  
Author(s):  
Masaki Shimizu ◽  
Takumi Kinoshita ◽  
Ryosuke Shigitani ◽  
Yusuke Miyake ◽  
Kunihiko Tajima
Keyword(s):  
Precious Metal ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Metal Free ◽  
Organic Luminophores ◽  
Phosphorescence At Room Temperature

Crystals of and PMMA films doped with 2,5-bis(silylmethoxy)-1,4-diaroylbenzenes exhibit efficient green phosphorescence at room temperature.

Metal-free visible-light-induced aerobic oxidation of α-diazoesters leading to α-ketoesters in air

2021 ◽  
Author(s):  
Ruisheng Liu ◽  
Qishun Liu ◽  
Haoran Meng ◽  
Hongyu Ding ◽  
Jindong Hao ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Metal Free

A metal-free and visible-light-induced strategy has been established for the construction of α-ketoesters via aerobic oxidation of α-diazoesters with dioxygen in air at room temperature.

Pure room temperature phosphorescence emission of organic host-guest doped system with quantum efficiency of 64%

2021 ◽  
Author(s):  
Xiaoqing Liu ◽  
Wenbo Dai ◽  
Qian Junjie ◽  
Yunxiang Lei ◽  
Miaochang Liu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Halogen Atoms ◽  
System P ◽  
Phosphorescence Emission

A new doped system with pure phosphorescent emission is constructed using four 1-(4-(diphenylamino)phenyl)-2-phenylethan-1-one derivatives containing halogen atoms as the guests and benzophenone as the host. That is, the doped system...

scholarly journals Giant room temperature elastocaloric effect in metal-free thin-film perovskites

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Cheng Li ◽  
Yu Hui Huang ◽  
Jian-Jun Wang ◽  
Bo Wang ◽  
Yong Jun Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Room Temperature ◽  
Entropy Change ◽  
Stress Change ◽  
Chemical Doping ◽  
Metal Free ◽  
Organic Ferroelectrics ◽  
Potential Applications ◽  
Unit Stress

AbstractSolid-state refrigeration which is environmentally benign has attracted considerable attention. Mechanocaloric (mC) materials, in which the phase transitions can be induced by mechanical stresses, represent one of the most promising types of solid-state caloric materials. Herein, we have developed a thermodynamic phenomenological model and predicted extraordinarily large elastocaloric (eC) strengths for the (111)-oriented metal-free perovskite ferroelectric [MDABCO](NH4)I3 thin-films. The predicted room temperature isothermal eC ΔSeC/Δσ (eC entropy change under unit stress change) and adiabatic eC ΔTeC/Δσ (eC temperature change under unit stress change) for [MDABCO](NH4)I3 are −60.0 J K−1 kg−1 GPa−1 and 17.9 K GPa−1, respectively, which are 20 times higher than the traditional ferroelectric oxides such as BaTiO3 thin films. We have also demonstrated that the eC performance can be improved by reducing the Young’s modulus or enhancing the thermal expansion coefficient (which could be realized through chemical doping, etc.). We expect these discoveries to spur further interest in the potential applications of metal-free organic ferroelectrics materials towards next-generation eC refrigeration devices.

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