Publication

Direct evidence of microscopic homogeneity in disordered solids

Geoffrey Bodenhausen
1982
Journal Articles

Abstract

Nuclear spin diffusion can be utilized efficiently to gain information on the microscopic homogeneity in disordered solids. Two-dimensional NMR spectroscopy is employed for the measurement of the nuclear spin diffusion. The method is illustrated by comparing 2-dimensional 13C spin diffusion spectra of powder and melt-formed mixts. of adamantane and 2,2,3,3-tetramethylbutane. [on SciFinder (R)]

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Geoffrey Bodenhausen
1982
Journal Articles

Abstract

Official source

Related concepts (22)

Nuclear magnetic resonance spectroscopy

Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei. This spectroscopy is based on the measurement of absorption of electromagnetic radiations in the radio frequency region from roughly 4 to 900 MHz. Absorption of radio waves in the presence of magnetic field is accompanied by a special type of nuclear transition, and for this reason, such type of spectroscopy is known as Nuclear Magnetic Resonance Spectroscopy.

Nuclear magnetic resonance

Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This process occurs near resonance, when the oscillation frequency matches the intrinsic frequency of the nuclei, which depends on the strength of the static magnetic field, the chemical environment, and the magnetic properties of the isotope involved; in practical applications with static magnetic fields up to ca.

Nuclear Overhauser effect

The nuclear Overhauser effect (NOE) is the transfer of nuclear spin polarization from one population of spin-active nuclei (e.g. 1H, 13C, 15N etc.) to another via cross-relaxation. A phenomenological definition of the NOE in nuclear magnetic resonance spectroscopy (NMR) is the change in the integrated intensity (positive or negative) of one NMR resonance that occurs when another is saturated by irradiation with an RF field. The change in resonance intensity of a nucleus is a consequence of the nucleus being close in space to those directly affected by the RF perturbation.

Related publications (9)

Direct evidence of microscopic homogeneity in disordered solids

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