Relaxometry of water-metal ion interactions by Rudi Van Eldik

By Rudi Van Eldik

Content material: hide -- ADVISORY BOARD -- copyright -- desk of contents -- PREFACE -- ERRATUM -- creation: common thought OF NUCLEAR leisure -- I. what's Nuclear leisure? -- A. LONGITUDINAL leisure -- B. TRANSVERSE leisure -- C. THE ROTATING body ... -- D. CROSS-RELAXATION ... -- E. CROSS-CORRELATION ... -- II. leisure Mechanisms -- A. interplay WITH RAN ... -- B. leisure through CHEMIC ... -- C. SCALAR rest OF ... -- D. leisure by means of DIPOLAR ... -- E. QUADRUPOLAR chill out ... -- III. Water NMRD in Diamagnetic platforms -- A. PUREWATER -- B. WATER IN PROTEIN SOL ... -- REFERENCES 1 -- NMR leisure IN resolution OF PARAMAGNETIC COMPLEXES:RECENT THEORETICAL development FOR S=1 -- I. advent -- II. The ''Classical'' concept -- A. THE SOLOMONB̂LOEMB ... -- B. THE converted SOLOMON ... -- C. VALIDITY OF the purpose- ... -- D. THE REDFIELD chill out ... -- III. The Curie-Spin rest and comparable subject matters -- A. THE CURIE-SPIN sit back ... -- B. PARAMAGNETIC go ... -- IV. the overall (Slow-Motion) thought -- A. THE REDFIELD restrict AND ... -- B. THE LATTICE AND THE ZFS -- C. the consequences OF ZFS ... -- V. Electron Spin leisure and the PRE in a few restricting circumstances -- A. hugely SYMMETRIC SYS ... -- B. SLOWLY-ROTATING, LOW ... -- C. RAPIDLY-ROTATING SYS ... -- D. ELECTRON SPIN DYNA ... -- VI. Spin-Dynamics versions -- VII. Outer-Sphere rest -- A. basic elements -- B. OUTER-SPHERE PRE AND ... -- C. OUTER-SPHERE sit back ... -- D. CHEMICAL trade -- VIII. Molecular Vibrations, Electron Spin leisure and the PRE -- IX. Concluding feedback -- ACKNOWLEDGMENTS 2 -- REFERENCES 2 -- 1H NMRD PROFILES OF PARAMAGNETIC COMPLEXES AND METALLOPROTEINS -- I. From the NMRD Profile to the Electron leisure Mechanism -- A. DEPENDENCE OF THE ... -- B. THE starting place OF choose ... -- C. ELECTRON rest ... -- II. From the NMRD Profile to the Structural and Dynamic Parameters -- A. DEPENDENCE OF THE ... -- B. COPPER COMPLEXES ... -- C. IRON COMPLEXES AND ... -- D. MANGANESE advanced ... -- E. different TRANSITION ... -- F. GADOLINIUM COMPLEXES ... -- III. Magnetic Coupled platforms -- A. NUCLEAR AND pick ... -- B. EXAMPLES -- IV. Conclusions -- ACKNOWLEDGMENTS three -- REFERENCES three -- Gd(III)-BASED distinction brokers FOR MRI -- I. common comments -- II. Contributions to the Relaxivity -- A. INNER-SPHERE CONTRI ... -- B. OUTER-SPHERE CONTRI ... -- C. SECOND-SPHERE CONTR

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In that case, the hyper¢ne coupling (generally denoted by ASC or Ac; and exists only if the electron density is non-zero at the considered nucleus, hence the terminology of ‘‘contact’’) replaces the J coupling and the earlier statement (i) may be untrue because it so happens that T2S becomes very short. In that case, dispersion curves provide some information about electronic relaxation. 1 of Chapter 3. D. RELAXATION BY DIPOLAR (OR DIRECT) INTERACTION Here the problem is complicated by the fact that the system includes at least two spins 1/2 interacting by dipolar interaction (this is the simplest one which can be thought of) and the major di¡erence with a spin system involving a single spin 1/2 is that one has to deal with a four-level energy diagram instead of a two-level energy diagram (Fig.

This is a quadrupolar nucleus (I = 5/2) with a purely intramolecular relaxation and not subjected to exchange. As the essentials of this book are devoted to paramagnetic systems, we shall, for the sake of completeness, conclude this introductory chapter by a related discussion about diamagnetic systems and more precisely about water NMRD in protein solutions. A. PURE WATER At ambient temperature, 1H, 2H and 17O relaxation is in the extreme narrow range and dispersion curves are perfectly £at (see Fig.

When the ¢rst and the third Lorentzian in Eq. (10) start decaying) and the high-¢eld dispersion at oItc ¼ 1, when the second Lorentzian disperses. An experimental diagram corresponding to Fig. 2 and describing the ¢eld-dependence of the nuclear spin^lattice relaxation rate is called nuclear magnetic relaxation dispersion (NMRD) pro¢le. 1 1 10 100 1000 Proton Larmor Frequency (MHz) FIG. 2. Field-dependence of the PRE according to the Solomon model, Eq. (10). The rotational correlation time of 1 ns is used.

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