The noncoincidence phenomenon of acetonylacetone C[double bond, length as m-dash]O stretching in a binary mixture and the aggregation-induced split theory.

This article aims to correlate the noncoincidence effect phenomenon with the aggregation state of acetylacetone C[double bond, length as m-dash]O stretching in a binary mixture. C[double bond, length as m-dash]O stretching noncoincidence effect (NCE) was observed not only between IR and Raman spectra but also between the isotropic and anisotropic Raman spectra of acetonylacetone. The difference in C[double bond, length as m-dash]O stretching wavenumbers of the isotropic and anisotropic Raman spectra (NCE value) in a binary mixture at different concentrations has been calculated.