Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. 31181-90-5, formula is C6H4BrNO, Name is 5-Bromopicolinaldehyde. TThe standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Name: 5-Bromopicolinaldehyde.
Shi, Yi-Zhong;Wang, Kai;Zhang, Shao-Li;Fan, Xiao-Chun;Tsuchiya, Youichi;Lee, Yi-Ting;Dai, Gao-Le;Chen, Jia-Xiong;Zheng, Cai-Jun;Xiong, Shi-Yun;Ou, Xue-Mei;Yu, Jia;Jie, Jian-Sheng;Lee, Chun-Sing;Adachi, Chihaya;Zhang, Xiao-Hong research published 《 Characterizing the Conformational Distribution in an Amorphous Film of an Organic Emitter and Its Application in a “Self-Doping” Organic Light-Emitting Diode》, the research content is summarized as follows. The conformational distribution and mutual interconversion of thermally activated delayed fluorescence (TADF) emitters significantly affect the exciton utilization. However, their influence on the photophysics in amorphous film states is still not known due to the lack of a suitable quant. anal. method. Herein, we used temperature-dependent time-resolved photoluminescence spectroscopy to quant. measure the relative populations of the conformations of a TADF emitter for the first time. We further propose a new concept of “self-doping” for realizing high-efficiency nondoped OLEDs. Interestingly, this “compositionally” pure film actually behaves as a film with a dopant (quasi-equatorial form) in a matrix (quasi-axial form). The concentration-induced quenching that may occur at high concentrations is thus expected to be effectively relieved. The “self-doping” OLED prepared with the newly developed TADF emitter TP2P-PXZ as a neat emitting layer realizes a high maximum external quantum efficiency of 25.4% and neglectable efficiency roll-off.
Name: 5-Bromopicolinaldehyde, 5-Bromopyridine-2-carbaldehyde is a useful research compound. Its molecular formula is C6H4BrNO and its molecular weight is 186.01 g/mol. The purity is usually 95%.
5-Bromopyridine-2-carbaldehyde is a water soluble organic molecule that has been shown to inhibit the mitochondrial respiratory chain. It is a structural analog of the natural substrate for mitochondrial cytochrome c oxidase, 5-aminolevulinic acid. This compound has been shown to be selective against cancer cells and has anti-viral properties. The photophysical properties of 5-bromopyridine-2-carbaldehyde have been studied extensively. The fluorescence quantum yield of this molecule in aqueous solution is 0.06%., 31181-90-5.