Magnetic circularly polarized luminescence

Circularly polarized luminescence (CPL) from chiral molecular systems is the emission analog of circular dichroism (CD) and as such reflects the chirality of the excited state in the same maimer as CD probes reflect the chirality of the ground state (Riehl and Muller, 2005). For lanthanide ions, laige CPL (and/or CD) signals are expected for f-f transitions obeying magnetic dipole selection rules, in particular A J = 0, 1 Eu(5Do —> 7Fi), Tb(5D4 7F4, 5D4 7F5), Dy(4F9/2 6Hn/2), Yb(2Fs/2 2F7/2) emissions are typical examples. Recent... 

To date, a number of experimental studies of the excited states of ZnPc have been made available, including gas phase [172], thin film [173], solution [174, 175], and argon matrix [176] absorption spectra, solution [174, 175] and argon matrix [176] MCD spectra, solution luminescence spectra [177], and luminescence and magnetic circularly polarized luminescence (MCPL) spectra in an argon matrix [177]. 

The interaction of an external magnetic field with an ensemble of excited molecules provides a novel method for determining excited state parameters by inducing circularly polarized luminescence. The signal obtained from a sample of tris(2,2 -bipyridine) ruthenium (II) chloride... 

Lanthanide f-f transitions are, in principal, more useful than their transition metal counterparts in probing the geometry round the metal ion. In particular the circularly polarized luminescence (CPL) spectra of Eu and Tb has been extensively used for this purpose. However, our understanding of f-f CD/CPL is less than that of d-d transitions. In both the lanthanide ions mentioned above there are sources of both magnetic and electric dipole intensity. The problem is that the transitions belong to different J states and J is, to a first approximation, a good quantum number. To exemplify the transition of Eu is magnetic dipole allowed, the 4 and... 

Bit measure of the reduction of (A.) due to energy transfer MCPL acronym for Magnetic Circularly Polarized Luminescence... 

This volume of the Handbook on the Physics and Chemistry of Rare Earths adds five new chapters to the science of rare earths, compiled by researchers renowned in their respective fields. Volume 34 opens with an overview of ternary intermetallic systems containing rare earths, transition metals and indium (Chapter 218) followed by an assessment of up-to-date understanding of the interplay between order, magnetism and superconductivity of intermetallic compounds formed by rare earth and actinide metals (Chapter 219). Switching from metals to complex compounds of rare earths, Chapter 220 is dedicated to molecular stmctural studies using circularly polarized luminescence spectroscopy of lanthanide systems, while Chapter 221 examines rare-earth metal-organic frameworks, also known as coordination polymers, which are expected to have many practical applications in the future. A review discussing remarkable catalytic activity of rare earths in site-selective hydrolysis of deoxyribonucleic acid (DNA) and ribonucleic acid, or RNA (Chapter 222) completes this book. 

CPL = circular polarized luminescence LB Langmuir-Blodgett SMMs = single molecule magnets. 

Other techniques, such as magnetic circular dichroism (Gorller-Walrand and Godemont 1977, Gorller-Walrand et al. 1982), circularly polarized luminescence (Dyer et al. 1986, Glover et al. 1992) or magnetic circularly polarized luminescence (Richardson and Brittain 1981, Foster and Richardson 1983, Stephens et al. 1986) have also been used for the study of Eu and Tb complexes. 

See also Biochemical Applications of Raman Spectroscopy Biomacromolecular Applications of Circular Dichroism and ORD Carbohydrates Studied by NMR Circularly Polarized Luminescence and Fluorescence Detected Circular Dichroism Induced Circular Dichroism Magnetic Circular Dichroism, Theory Nucleic Acids and Nucleotides Studied Using Mass Spectrometry Organometallics Studied Using Mass Spectrometry Polymer Applications of IR and Raman Spectroscopy Proteins Studied Using NMR Spectroscopy Vibrational CD Spectrometers Vibrational CD, Theory. 

The interaction of aspartic acid and other ligands with complexes of Tb " with edta and related ligands has also been studied and association constants determined. The complex formation between Tb " or Eu " and (r)-( — )-l,2-propanediaminetetraacetic add or (r,r)-trons-1,2-cyclohexanediaminetetraacetic acid has been similarly investigated. The pH dependence of the circularly polarized and total luminescence shows a drastic configurational change of the chelate system at pH 10.5-11, corresponding, it is believed, to formation of hydroxide complexes. Tlie technique of magnetic-field-induced circularly polarized emission has been introduced for lanthanide ions the mechanisms of lanthanide transition intensities are also discussed in the paper. 

Probing Metalloproteins Electronic absorption spectroscopy of copper proteins, 226, 1 electronic absorption spectroscopy of nonheme iron proteins, 226, 33 cobalt as probe and label of proteins, 226, 52 biochemical and spectroscopic probes of mercury(ii) coordination environments in proteins, 226, 71 low-temperature optical spectroscopy metalloprotein structure and dynamics, 226, 97 nanosecond transient absorption spectroscopy, 226, 119 nanosecond time-resolved absorption and polarization dichroism spectroscopies, 226, 147 real-time spectroscopic techniques for probing conformational dynamics of heme proteins, 226, 177 variable-temperature magnetic circular dichroism, 226, 199 linear dichroism, 226, 232 infrared spectroscopy, 226, 259 Fourier transform infrared spectroscopy, 226, 289 infrared circular dichroism, 226, 306 Raman and resonance Raman spectroscopy, 226, 319 protein structure from ultraviolet resonance Raman spectroscopy, 226, 374 single-crystal micro-Raman spectroscopy, 226, 397 nanosecond time-resolved resonance Raman spectroscopy, 226, 409 techniques for obtaining resonance Raman spectra of metalloproteins, 226, 431 Raman optical activity, 226, 470 surface-enhanced resonance Raman scattering, 226, 482 luminescence... 

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