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, Computed Properties of C4H6O3, 7331-52-4, Name is (S)-4-Hydroxydihydrofuran-2(3H)-one, SMILES is O=C1OC[C@@H](O)C1, belongs to Tetrahydrofurans compound. In a document, author is Sailaja, Sidharth Thulaseedharan Nair, introduce the new discover.
Naphthalonitriles featuring efficient emission in solution and in the solid state
In this work, a series of gamma-substituted diphenylnaphthalonitriles were synthesized and characterized. They show efficient emission in solution and in the aggregated state and their environment responsiveness is based on having variable substituents at the para-position of the two phenyl moieties. The excited state properties were fully investigated in tetrahydrofuran (THF) solutions and in THF/H2O mixtures. The size of the aggregates in aqueous media were measured by dynamic light scattering (DLS). The steadystate and time-resolved photoluminescence spectroscopy studies revealed that all the molecules show intense fluorescence both in solution and in the aggregated state. In THF solutions, a blue emission was observed for the unsubstituted (H), methyl(Me) and tert-butyl(t-Bu) substituted gamma-diphenylnaphthalonitriles, which can be attributed to a weak pi-donor capability of these groups. On the other hand, the methoxy(OMe), methylsulfanyl(SMe) and dimethylamino(NMe2) substituted compounds exhibit a progressive red-shift in emission compared to H, Me and t-Bu due to a growing pi-electron donating capability. Interestingly, upon aggregation in water-containing media, H, Me and t-Bu show a slight red-shift of the emission and a blue-shift is observed for OMe, SMe and NMe2. The crystal structure of Me allowed a detailed discussion of the structure-property relationship. Clearly, N-containing substituents such as NMe2 possess more electron-donating ability than the S-based moieties such as SMe. Moreover, it was found that NMe2 showed higher luminescence quantum yields (Phi(F)) in comparison to SMe, indicating that N-substituted groups could enhance the fluorescence intensity. Therefore, the pi-donor nature of the substituents on the phenyl ring constitutes the main parameter that influences the photophysical properties, such as excited state lifetimes and photoluminescence quantum yields. Hence, a series of highly luminescent materials from deep blue to red emission depending on substitution and environment is reported with potential applications in sensing, bioimaging and optoelectronics.
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 7331-52-4. Computed Properties of C4H6O3.
Reference:
Tetrahydrofuran – Wikipedia,
,Tetrahydrofuran | (CH2)3CH2O – PubChem