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Spin resonance

In an electron spin resonance spectrometer, transitions between the two states are brought about by the application of the quantum of energy hv which is equal to g H. The resonance condition is defined when hv = g H and this is achieved experimentally by varying H keeping the frequency (v) constant. Esr spectroscopy is used extensively in chemistry in the identification and elucidation of structures of radicals. [Pg.152]

The polymer concentration profile has been measured by small-angle neutron scattering from polymers adsorbed onto colloidal particles [70,71] or porous media [72] and from flat surfaces with neutron reflectivity [73] and optical reflectometry [74]. The fraction of segments bound to the solid surface is nicely revealed in NMR studies [75], infrared spectroscopy [76], and electron spin resonance [77]. An example of the concentration profile obtained by inverting neutron scattering measurements appears in Fig. XI-7, showing a typical surface volume fraction of 0.25 and layer thickness of 10-15 nm. The profile decays rapidly and monotonically but does not exhibit power-law scaling [70]. [Pg.402]

Electron Spin Resonance Spectroscopy. Several ESR studies have been reported for adsorption systems [85-90]. ESR signals are strong enough to allow the detection of quite small amounts of unpaired electrons, and the shape of the signal can, in the case of adsorbed transition metal ions, give an indication of the geometry of the adsorption site. Ref. 91 provides a contemporary example of the use of ESR and of electron spin echo modulation (ESEM) to locate the environment of Cu(II) relative to in a microporous aluminophosphate molecular sieve. [Pg.586]

Bertini I, Martini G and Luchinat C 1994 Relaxation, background, and t neory Handbook of Electron Spin Resonance (ed C Poole and H Farach (New York American Institute of Physics) oh 3, pp 51-77... [Pg.1588]

McLauchlan K A 1990 Continuous-wave transient electron spin resonance Modern Pulsed and... [Pg.1588]

Continuous-Wave Electron Spin Resonance ed L Kevan and M Bowman (New York Wiley) oh 7, pp 285-363... [Pg.1588]

Feher G 1956 Observation of nuclear magnetic resonances via the electron spin resonance line Rhys. Rev. 103 834-7... [Pg.1588]

Schwelger A 1991 Pulsed electron spin resonance spectroscopy basic principles, techniques, and examples of applications Angew. Chem. Int. Edn Engl. 30 265-92... [Pg.1589]

Earle K, Budll D and Freed J 1996 Millimeter wave electron spin resonance using quasloptical techniques Advances in Magnetic and Optical Resonance vol 19, ed W Warren (San Diego ... [Pg.1590]

Allgeler J, DIsselhorst A, Weber R, Wenckebach W and Schmidt J 1990 High-frequency pulsed electron spin resonance Modern Pulsed and Continuous-Wave Electron Spin Resonance ed L Kevan and M K Bowman (New York Wley) ch 6, pp 267-83... [Pg.1590]

Fessenden R W and Schuler R H 1963 Electron spin resonance studies of transient alkyl radicals J. Chem. Phys. 39 2147-95... [Pg.1618]

Fessenden R W and Verma N C 1976 Time resolved electron spin resonance spectroscopy. III. Electron spin resonance emission from the hydrated electron. Possible evidence for reaction to the triplet state J. Am. Chem. Soc. 98 243-4... [Pg.1619]

Adrian F J 1971 Theory of anomalous electron spin resonance spectra of free radicals in solution. Role of diffusion-controlled separation and reencounter of radical pairs J. Chem. Rhys. 54 3918-23... [Pg.1619]

Buckley C D, Hunger D A, Here P J and McLauchlan K A 1987 Electron spin resonance of spin-correlated radical pairs Chem. Phys. Lett. 135 307-12... [Pg.1620]

Wang P, Maruyama Y and Metzger R M 1996 Superconductivity of Cgg Langmuir-Blodgett films doped with potassium low-field signal and electron spin resonance study Langmuir M 3932-7... [Pg.2430]

A wide variety of measurements can now be made on single molecules, including electrical (e.g. scanning tunnelling microscopy), magnetic (e.g. spin resonance), force (e.g. atomic force microscopy), optical (e.g. near-field and far-field fluorescence microscopies) and hybrid teclmiques. This contribution addresses only Arose teclmiques tliat are at least partially optical. Single-particle electrical and force measurements are discussed in tire sections on scanning probe microscopies (B1.19) and surface forces apparatus (B1.20). [Pg.2483]

See other pages where Spin resonance is mentioned: [Pg.152]    [Pg.162]    [Pg.246]    [Pg.369]    [Pg.481]    [Pg.519]    [Pg.549]    [Pg.693]    [Pg.1547]    [Pg.1623]    [Pg.1623]    [Pg.2420]    [Pg.2497]    [Pg.516]    [Pg.67]    [Pg.243]    [Pg.601]    [Pg.3]   
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