The Effects Of Formation Of Complex On The Fermi Resonance Of P-benzoquinone

Fermi resonance is a widely present in the intramolecular and inter-molecular vibration coupling and energy transfer phenomena. The research of Fermi resonance, has theoretical significance in the coupling between electronic states of molecular vibration and molecular structure research of Physics. And it also has been widely used in subjects such as Material science, Biology, Chemistry. Medical, Geology, Acoustics and Optics. By the development of optical instruments and Quantum Mechanics, Fermi resonance studies have advanced by scientists, and the results have proved this research has great potential. There are still many questions waiting about Fermi resonance to be confirmed.We had studied the Fermi resonance in the solution of two constituents with the method of change the concentration of the solution, and the solution contain CS2 and C6H6; by changing the pressure of biphenyl molecule, we analyzed the effect of pressure on the biphenyl molecule's Fermi resonance; we also used liquid-core optical fiber to get the Raman spectra of proline-benzoquinone complex, studied the effect of the complex on the p-Benzoquinone's Fermi resonance, and achieved the following results of innovative:(1) Effect of different concentration binary solution (CS2 inside of C6H6) to Fermi resonanceExcept for molecular internal factors of Fermi resonance, its also has a great relationship to physical form, the environment of molecular. Gaseous, liquid, solid-state Fermi resonance has been studied by a lot of staff. In solution, various interactions in solute and solvent molecules will cause certain groups molecular vibration frequencies and scattering coefficient (relative intensity) changes, all this changes will cause changes of molecular Fermi resonance. The study for impact of frequency change to Fermi resonance has been done by lots of people, but the study for effect of relative intensity to the Fermi resonance have not yet seen the report.Therefore, we measured the Raman spectra of C6H6 and CS2 in different concentrations and observed the Fermi resonance which is obviously different with pure CS2.We calculated the characteristic parameters with the equation of J.F.Berttern. The results state clearly that the ratio of the two spectral intensity decreases, the coupling coefficient increases and other parameters also change by the reduction of concentration. We also observed that the line v1and 2v2are not moving symmetrically which is explained by G.F ini and D.G.R effects. That is. this phenomenon is caused by solvent effects and great changes have taken place in the spectrum line scattering coefficient (relative strength). The results of the study show that the J.F.Berttern formula should be revised when two vibration spectral frequencies and spectral intensity have big difference. The study has significant reference meaning on solution spectral lines and understanding the Fermi resonance authentication microscopic mechanism.(2) Effects of pressure on biphenyl's Fermi resonanceAs organic photodiode and laser device developing rapidly, the use of polyphenylene compound in photoelectric devices has caused great attention. Since vibration spectrum contains conformational information of molecular space. research on Polymer's Fermi resonance has become hot issue.In this experiment. Raman spectrum of biphenyl molecule has been measured under the pressure of 0-15GPa. Result shows that as pressure increase, the intramolecular and intermolecularπ-πconjugation and delocalization effect enhanced and the absolute intensity of spectral line increased and blue shifted. The ratio (R(?)) of intensity of biphenyl molecule's Fermi resonance line decreased and the frequency difference increased. When pressure reached 8GPa. Fermi resonance disappeared. The relationship between natural frequency differenceΔ0 and coupling constant w under different pressure can be calculated with J. F. Betran's Theory and interpreted by high pressure phase transition approach. In the paper also discussed Fermi resonance coupling's weakening mechanism under high pressure.(3) The effects of formation of complexOn the Fermi resonance of p-benzoquinone Fermi Resonance is the phenomenon commonly found in simple molecules, and it has so many papers for the fermi Resonance researching of CO2, CS2. So accordingly there is more Fermi Resonances in complex molecules, complexes, polymers. In the course of the study, we find that some Spectrums in the complex, polymer are difficult to confirm the source, which is largely due to losing sight of the Fermi Resonance phenomenon. In the complex, the interaction between molecules would change some groups vibration frequency, dipole moment and polarization ratios. Simultaneously the Groups symmetry-may be transformed by the role of coordination too. All these factors would make a difference of the previous Fermi Resonance in the involved complex molecules.or produce new Fermi resonance.This paper studied the complex's Fermi resonance, the n-πcharge transfer complex is produced by the interaction between p-benzoquinone and amino acids. The interaction between p-Benzoquinone and amino acid has been hot topics of concerning in the physics. Similarly, the topic for the products of Interaction between the two molecules has been arguing for years. In the work, the present result confirm:different pH values produce different products, and it would creat new complex with electric charge transferring in the condition of Alkaline (pH=11). In the spectrometry research, we obtained complex Raman intensities are relatively weaker. Our research used Teflon resonance Raman spectra in liquid-core optical fiber technology, enhanced the Laman spectral intensity greatly, and gained high quality Raman spectra of the 10-4M proline-benzoquinone complex. There are great changes when comparing this spectra with the Raman spectra of p-benzoquinone. The reason is. during the complex formation proline's free electron which was belong to the N atom transfered to theπanti-bonding orbital of p-benzoquinone, the electron cloud in excited state that had left the orbit changed vibration frequency and polarization of p-benzoquinone's C=O,C=C,C-C bond, the related Fermi resonance is also changed.This article has analyze the Fermi resonance of benzoquinone C=O. C-C bond after forming complex, and also compare to the result of document. The result is that C=O bond Fermi resonance change enormous but C-C bond Fermi resonance changes little. idea and clue have been given by this result about spectral line attribution and certification in complex spectroscopy.