Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, Recommanded Product: 6-Chlorooxindole, 56341-37-8, Name is 6-Chlorooxindole, SMILES is O=C1NC2=C(C=CC(Cl)=C2)C1, belongs to indolines-derivatives compound. In a document, author is Ozhogin, Ilya V., introduce the new discover.
Synthesis and study of new photochromic unsymmetrical bisspiropyrans with nonequivalent heteroarene fragments conjugated through the common 2H,8H-pyrano[2,3-f]chromene moiety
Four novel bis-spiropyrans possessing two different photochromic units based on indoline and 1,3benzoxazine heterocycles which are connected through the common 2H,8H-pyrano[2,3-f]chromene moiety and modified with electron donating substituents were obtained by multistep synthesis starting with 2,4-dihydroxy-iso-phthalic aldehyde. The structure of the compounds was confirmed by H-1 and (CNMR)-C-13, FTIR and HRMS. All bis-spirocompounds exhibited photochromic activity at room temperature. Investigation of photochromic properties of bis-spiropyrans revealed that their once-opened merocyanine isomers were more stable than the double-opened ones under experimental conditions. It was also found that modification of the benzoxazine moiety of the molecule with electron donating substituents along with introduction of bulky benzyl group close to the oxazinespiro-center leads to an increase of the merocyanine lifetime up to 148 s. (C) 2020 Elsevier B.V. All rights reserved.y
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 56341-37-8. Recommanded Product: 6-Chlorooxindole.