At 25 °C pyridine has a viscosity of 0.88 mPa/s and thermal conductivity of 0.166 W·m−1·K−1. 31181-90-5, formula is C6H4BrNO, Name is 5-Bromopicolinaldehyde. The enthalpy of vaporization is 35.09 kJ·mol−1 at the boiling point and normal pressure.The enthalpy of fusion is 8.28 kJ·mol−1 at the melting point. Quality Control of 31181-90-5.
Wang, Yuesong;Yu, Haoli;Chen, Yan;Cui, Mengyuan;Ji, Min research published 《 Synthesis and application of near-infrared dyes based on sulfur-substituted dicyanomethylene-4H-chromene and diarylethene》, the research content is summarized as follows. Four novel compounds (S-DCM-1O, S-DCM-2O, S-DCM-3O, and S-DCM-4O) based on sulfur-substituted dicyanomethylene-4H-chromene (S-DCM) and diarylethene were synthesized. The detailed investigations on the fluorescence spectra, absorption spectra, and time-dependent d. functional theory calculations (DFT/TD-DFT) were presented. The encapsulation of mPEG2000-DSPE effectively increased the solubility of all the as-prepared samples. The results of TEM showed that the nanoparticles had a good dispersion coefficient All the nanomaterials (S-DCM-1O@PEG, S-DCM-2O@PEG, S-DCM-3O@PEG, and S-DCM-4O@PEG) exhibited near-IR emission (650-900 nm) and thus reduced light damage and light scattering for cell imaging in biol. applications. Furthermore, PLL (poly-L-lysine hydrobromide) was used to modify the surface of nanoparticles to facilitate easy uptake by A549 cells by changing their electronegativity. The results suggested that S-DCM-2O@PEG@PLL was a highly suitable candidate for cell imaging because of its low toxicity and excellent biocompatibility.
31181-90-5, 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%., Quality Control of 31181-90-5