Tuning the Photophysical Properties of Metal-Free Room Temperature Organic Phosphors via Compositional Variations in Bromobenzaldehyde/Dibromobenzene Mixed Crystals

2014 ◽  
Vol 26 (22) ◽  
pp. 6644-6649 ◽  
Author(s):  
Onas Bolton ◽  
Dongwook Lee ◽  
Jaehun Jung ◽  
Jinsang Kim
Keyword(s):  
Room Temperature ◽  
Photophysical Properties ◽  
Mixed Crystals ◽  
Metal Free ◽  
Organic Phosphors ◽  
Compositional Variations

scholarly journals Room-Temperature-Phosphorescence-Based Dissolved Oxygen Detection by Core-Shell Polymer Nanoparticles Containing Metal-Free Organic Phosphors

2017 ◽  
Vol 129 (51) ◽  
pp. 16425-16429 ◽  
Author(s):  
Youngchang Yu ◽  
Min Sang Kwon ◽  
Jaehun Jung ◽  
Yingying Zeng ◽  
Mounggon Kim ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Room Temperature ◽  
Polymer Nanoparticles ◽  
Core Shell ◽  
Room Temperature Phosphorescence ◽  
Metal Free ◽  
Oxygen Detection ◽  
Organic Phosphors

scholarly journals Efficient metal-free organic room temperature phosphors

2021 ◽  
Author(s):  
Aakash D. Nidhankar ◽  
Goudappagouda ◽  
Vivek C. Wakchaure ◽  
Sukumaran Santhosh Babu
Keyword(s):  
Quantum Yield ◽  
Room Temperature ◽  
Metal Free ◽  
Long Lifetime ◽  
Organic Phosphors ◽  
Triplet Excitons

A summary of the extremely efficient organic phosphors that utilized the best possible ways to manipulate the fate of triplet excitons for achieving a long lifetime along with impressive quantum yield and afterglow properties is provided.

scholarly journals The influence of molecular conformation on the photophysics of organic room temperature phosphorescent luminophores

2018 ◽  
Vol 6 (34) ◽  
pp. 9238-9247 ◽  
Author(s):  
Rongjuan Huang ◽  
Jonathan S. Ward ◽  
Nadzeya A. Kukhta ◽  
João Avó ◽  
Jamie Gibson ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Conformation ◽  
Photophysical Properties ◽  
Conformational Control ◽  
Metal Free

Tuning of photophysical properties by conformational control with dual RT phosphorescence in metal-free organic emitters.

scholarly journals Temperature and Pressure Variation of the Cl-NQR in A2PbCl6-Crystals

1986 ◽  
Vol 41 (1-2) ◽  
pp. 311-314 ◽  
Author(s):  
Y. M. Seo ◽  
J. Pelzl ◽  
C. Dimitropoulos
Keyword(s):  
Relaxation Rate ◽  
Room Temperature ◽  
Lattice Relaxation ◽  
Pressure Variation ◽  
Mixed Crystals ◽  
Spin Lattice Relaxation ◽  
Structural Transitions ◽  
Spin Lattice Relaxation Rate ◽  
Spin Lattice ◽  
Temperature And Pressure

The 35Cl NQR frequency and spin-lattice relaxation rate in the compounds A2PbCl6 (A = Cs, Rb, NH4, K) have been investigated in the range 4.2 K to 500 K, and as a function of pressure at room temperature. NQR experiments conducted on (K: NH4)2PbCl6 mixed crystals have been used to complete the NQR-frequency versus temperature diagram of K2PbCl6, revealing two structural transitions at Tc1 ≅ 358 K and at TC2 ≅ 333 K.

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.

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.

Visible-light-promoted sulfonylation of thiols with aryldiazonium and sodium metabisulphite leading to unsymmetrical thiosulfonates

2021 ◽  
Author(s):  
Yu-Fen Lv ◽  
Jinyun Luo ◽  
Yuchuan Ma ◽  
Qi Dong ◽  
Lin He
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Metal Free ◽  
Sodium Metabisulphite ◽  
Three Component Reaction

A new visible-light-mediated protocol has been proposed for the synthesis of thiosulfonates via metal-free sulfonylation of thiols with aryldiazonium and sodium metabisulphite at room temperature. This mild three-component reaction, simply...

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