Application of 4637-24-5In 2021 ,《Photophysical and crystallographic study of three integrated pyrazolo[1,5-a]pyrimidine-triphenylamine systems》 appeared in Dyes and Pigments. The author of the article were Tigreros, Alexis; Macias, Mario; Portilla, Jaime. The article conveys some information:
Three new intramol. charge transfer (ICT) fluorophores having triphenylamine and pyrazolo[1,5-a]pyrimidine moieties 4a-c were synthesized, and their structures were solved by X-ray crystallog. (XRC). Compounds 4a, 4b and 4c crystallize in the tetragonal P42/n, triclinic P-1 and monoclinic P21/c space groups with calculated CE-B3LYP structural energies of -104.3, -125.6 and -123.8 kJ/mol, resp. Substituents effect on mol. and photophys. properties of 4a-c was studied in both solution and solid-state through fluorescence, UV-vis, XRC, and computational methods. The 2-Ph (4b) and 2-anisyl (2c) derivatives showed better absorption coefficient (4b, ε = 76400 → 119600 M-1cm-1 and 4c, ε = 66200 → 89200 M-1cm-1) than 4a (2-Me, ε = 9933 → 21667 M-1cm-1), while the relative quantum yield (φ) in solvents of diverse polarity is as high as φ = 0.98 for 4a, φ = 0.86 for 4b and φ = 0.83 for 4c. For these dyes, Lippert-Mataga correlation were used to estimate the difference between the excited and ground state dipole moments (Δμ), being 4b the one that suffer the bigger changes with a Δμ of 26.9 D. Probe 4c is found to be useful as a fluorescent indicators for the qual. sensing of water content in organic solvents. The solid-state emission data reveal that the antiparallel mol. packing of the crystal structure for 4a-c, with energy framework diagrams influenced mainly by dispersion forces, could disturbs the photophys. properties by changing the donor-acceptor intramol. coupling. Therefore, the combination of these XRC and photophys. results may constitute in a key input for designing applications in material science. The experimental part of the paper was very detailed, including the reaction process of N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Application of 4637-24-5)
N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Application of 4637-24-5
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem