The ⁵⁷Fe nuclear magnetic resonance (NMR)(77K-room temperature RT) and RT Mossbauer effect(ME) of Li-Ti-Mg and Li-Ti-Zn fervite systems waseve studied in this work.The NMR multiple line spectra caused bymagnetic sublattice were observed, the temperature and compositionalvariations of resonant frequences and their dependences on saturationmagnetic moment were discussed. The Mossbauer spectra of nearly Pure Li-ferrite and complex ferrites substituted by Ti,Mg and Zn ions may be resolved into 2 and 7 sets of subspectra, respectiyely.The experiment results were discussed.

The Mossbauer Spectra of the synthetic iron porphyrins Fe (OEP) Cl, Fe (NO₂) (OEP)Cl, and Fe(NO₂)₂(OEP)Cl were measured at 77k, 300k and in anexternal megnetic field of 5KOe at room temperature. The Changes of the spectral shape was explained by electron Spin-Spin relaxation. The small difference of the isomer shift caused by the different number of NO₂-groups substituted for the meso-positions in the pyrrole ring was discussed.

In the present paper the ¹H NMR and ¹³C NMR spectral data of N-(α,β disu-bstituted-4-chloro-cinnamyl) -sec. -butylamine compounds were reported Compared the chemical shifts of hydrogen and carbon in the amide groups ofthe compounds, the configurations of the compounds were assigned.The configurations assigned according to NMR were proved by the results of X-ray diffraction of the crystals of the compounds.

The ²⁹Si NMR spectra of a, w-bischloro-and a, w-bis (diethylamine)-polydcmethylsilanes(I) (X=Cl,NEt₂;n=0,1,2,3,4,5,6)andcyclosilanes(R₂SiO)_n(Ⅱ),cyclo-silazanes(R₂SiNH)_n, (Ⅱ) (R=Me,Ph;n=3,4) have been measured.The effets of n and X(X=Cl,OH,NEt₂,Me) on δsi of end-and middle-groups in I and the effects of ring-size and R on δsi of Ⅱ,Ⅲ have been discussed.

The ¹¹¹Cd,¹¹³Cd,¹¹⁷Sn,¹¹⁹Sn,¹⁹⁹Hg NMR spectra of metallic complexes MPy₂M(bi-Py)Cl₂, M(o-Phen)Cl₂ (M=Cd, Sn, Hg) have been recorded directly using FT-NMR spectrometer. The influences of solvent, concentration and temperature on the chemical shifts of the spectra are investigated,The variations of the spectral parameters with the molecular structures as well as primary isotope shielding effects are discussed.

The effect of filling factor of receiver coil and the construction parameters of reciever coil on sensitivity of NMRspectrometer and The relationship between the limitation of Signal-Noise ratio for NMR signal and the tested Signal noice ratio for double T-bridge circuit have been discussed, An improvement has been taken to normal receiver coil (it is wound outside a tube which has 7mm O.D. and 6mm I.D.), The reciever coil is put inside the tube against its wall. It has been proved by experiment that using the CH₂₀₃ NMR spectrometer (made by Beijing Analytical Instrument Factory) with 5mm O.D.tube and 1% ethyl benzene, The sensitivity is raised from 20:1 (by normal receiver coil) to 30:1 (by improved reveiver coil).

A new method for the correction of phase errors in the single-side band Fourier transform spectrum is presented. The spectra transformed by this method were compared with those by Forman's conyolution method and the double-side band FFT.The results showed that this new method is satisfactory and its computation speed is faster than the others.

Effects of different PH's and deoxygenation were studied on ESR spectra of several piperidine nitroxyl radicals in solutions. Two water-soluble radicals were observed to be considerably stable in buffer solutions with PH_3-12.Deoxy -genation did not affect the ESR characteristics of free radicals in the solid state, but in their solutions, it was the solvent polarity that played a dicisive role in the emergence of deoxygenation effects. In solvents with lower polarity, deoxygenation led to a marked narrowing and intensification of ESR spectra. And what is more, the degree of perfectness of the ¹⁴N hyperfine splitting became very conspicuously enhanced. However, the deoxygenation effects in aqueous solutions were negligible.

In this paper,the 360MHz ¹H-NMR spectra data of new 9 tittle compounds are reported.The cis-configuration of lactam ring β of tittle compounds have been identified by the coupling constants and chemical shifts, The configuration can't be determined by 60MHz and 80MHz ¹H-NMR spectra.

In this paper,we have evidenced that ChllA dimer sample is (Chla-H₂O)₂ by direct measurements of the whole soybean (or spinach) leaf ESR. For chlorophyll ESR measurements, the leaves were irradiated with ultraviolet lamp and continuous He-Ne laser. The signal of (Chla-H₂O)₂⁺. and signal I of the whole soybean leaf have same origin. Therefore (Chla-H₂O)₂ can simulate that the investigations of the organization and function of the soybean leaf reactioncenterOur experimental date show that the soybean leaf ESR spectrum can beanalysed by the radical Pair theory.

The method to solve Schrodinger equation with metrix function theory is presented. The time independent Hamiltonian and time dependent Hamiltonian are discussed respectively. For the Time independent Hamiltonian, this method gives a completely regular way to solve Schrodinger equation. For the time dependent Hamiltonian, only the two level system is discussed.

The solid and solution spectra of the soft segment of styrene-dimethyl sil-oxane block copolymeri, are studied by ¹³C and ²⁹Si NMR spectroscopy and their spin-lattice relaxation times(T₁) are determined.It is found that in CDCl₃ solution the T₁s of the main chain ²⁹Si and the pendant methyl group ¹³C are toth longer than the homopoly dimethylsiloxane, but they are identical with the homopolymer in the bulk state,It is known that the spin-lattice relaxation of high polymers is mainly dominated by dipole-dipole interactions. There isa clear two-phase strucre, Therefore, the mode of motion is essentially the same in block and in homopolymers CDCl₃ is a good solvent for polystyrene and polydimethylsiloxane. In CDCl₃ solution there is a mutual effect between the hard and the soft segmental motion no longer resembles that of the homopolymer.Therefore, the correlation time of the segmental motion of the block copolymer is shorter and T₁ is much longer.

The line shape of NMR signal from annular sample of two coaxial Cylindrical glass tubes is carefully observed. It has been shown that the line shape exhibits not only the character as was described in early literature,but also fine structures. The latter is justified by theoretical analysis.

The theory,and Experimental conditions of Rapid Scan Correlation Nuclear Magnetic Resonance (RSNMR) are illuminated in this paper. A rapid scan correlation method of the using reference signal processing to obtain undistorted slow passage spectra without the need for phase correction. The RSNMR spectral measurment is performed by experimental system of minicomputer and CWNMR spectrometer. The RSNMR technique is discussed in detail. The advantages and applications of the RSNMR are pointed out.