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. Computed Properties of 31181-90-5.
Liu, Meifang;Han, Yi;Yuan, Wei;Guo, Changxiang;Shi, Shiling;Liu, Xia;Chen, Yulan research published 《 Fluorescent BF2 complexes of pyridyl-isoindoline-1-ones: synthesis, characterization and their distinct response to mechanical force》, the research content is summarized as follows. Three boron-pyridyl-isoindoline-1-one based dyes (I: B1, B2, and B3) with varied side groups were facilely synthesized. Detailed analyses were carried out concerning the crystal conformation, structure dependent photophys. properties and mechanochromic fluorescence (MCF). The MCF behaviors and solid-state emission are correlated to the different side groups. Upon grinding, the emission of B1 exhibited little changes, whereas reversible MCF with a distinct color change was observed for B2 and B3. B3 possessing sterically hindered tri-Ph amine (TPA) groups showed the most prominent MCF effect. For instance, mech. grinding resulted in a red shift of fluorescence from 600 nm to 650 nm. The electronic and steric effects of the donating substituents play important roles in modulating the intramol. charge-transfer effect and intermol. interactions. These sensitively and readily tunable mechano-responsive behaviors of the boron-pyridyl-isoindoline-1-one based dyes make them potential candidates for smart fluorescent materials.
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%., Computed Properties of 31181-90-5