@article {4423,
	title = {Theory of muon spin relaxation of Mu+CO},
	journal = {Physical Review A},
	volume = {58},
	number = {6},
	year = {1998},
	note = {ISI Document Delivery No.: 145CDTimes Cited: 5Cited Reference Count: 35},
	month = {Dec},
	pages = {4431-4446},
	type = {Article},
	abstract = {In previous papers [Phys. Rev. A 50, 4743 (1994); 54, 4815 (1996)] a theoretical description of the signals associated with the muon spin relaxation of simple muonated gaseous radicals has been presented. These gaseous radicals were assumed to have been formed during the slowing down process of the muons in the gaseous target and assumed to be stable chemical species at the initial observation time. The observed signals were attributed to these stable radicals. In this paper the theoretical description is extended to include situations where the radicals are formed in slow processes as opposed to fast processes with the assumption that the muon exists as muonium at the initial observation time. This muonium then reacts for the time duration of the experiment, which is limited by the muon{\textquoteright}s lifetime. The theoretical treatment is based on an operator expansion of the spin density operators for muonium and for the molecular radicals whose time dependences are described by a set of coupled linearized quantum kinetic equations. Relaxation of the signals is due to two effects, namely, the chemical reactions themselves and the collisions that reorient the molecular radical{\textquoteright}s rotational angular momentum. This affects the muon{\textquoteright}s spin via intramolecular couplings between the muon{\textquoteright}s spin, the radical{\textquoteright}s free-electron spin, and the radical{\textquoteright}s rotational angular momentum. The coefficients of the radical{\textquoteright}s spin Hamiltonian, the collisional reorientation lifetimes (cross sections), and the chemical reaction rates may be used as fitting parameters to describe the experimental signals. These could also be calculated from first principles. [S1050-2947(98)00212-1].},
	keywords = {EXCHANGE, GAS-PHASE, IRREDUCIBLE CARTESIAN TENSORS, O-2, radicals, REACTION-KINETICS},
	isbn = {1050-2947},
	url = {<Go to ISI>://000077352700025},
	author = {Turner, R. E. and Snider, R. F.}
}
@article {4135,
	title = {Fast muonium reactions in solution: An electron spin exchange interaction with Cr(NCS)(6)(3-) in water and reaction with iodine in organic solvents},
	journal = {Journal of Physical Chemistry A},
	volume = {101},
	number = {26},
	year = {1997},
	note = {ISI Document Delivery No.: XG935Times Cited: 3Cited Reference Count: 34},
	month = {Jun},
	pages = {4741-4744},
	type = {Article},
	abstract = {Two reactions of muonium atoms close to the diffusion-controlled limit were analyzed as a function of solute size and solvent viscosity. With Cr(NCS)(6)(3-) as solute in water, the reaction is an electron spin-conversion process, and the observed rate is taken to be half of the actual encounter rate, because of the quantum mechanical statistical factor and the occurrence of multiple collisions due to the solvent cage effect. The encounter rate deduced is 6.2 x 10(10) M-1 s(-1), which implies a large cross section for the Cr complex. In a second series of experiments, the rate of reaction of muonium with I-2 was compared in water, methanol and n-heptane. The bimolecular rate constants determined are (1.7 +/- 0.3), (7.0 +/- 1.2), and (57 +/- 22) x 10(10) M-1 s(-1), respectively, in these three solvents. This similar to 30-fold change in rate is not matched by the change in the inverse of the solvents{\textquoteright} viscosities, which changed overall by a factor of only 2.4. It looks as if quantum tunneling dominates over classical diffusion in less polar media where muonium is unencumbered by solvent clathration.},
	keywords = {AQUEOUS-SOLUTION, COMPLEXES, HYDROGEN-ATOMS, O-2, POSITRONIUM, radicals, relaxation, ROTATION},
	isbn = {1089-5639},
	url = {<Go to ISI>://A1997XG93500012},
	author = {Stadlbauer, J. M. and Venkateswaran, K. and Porter, G. B. and Walker, D. C.}
}
@article {3650,
	title = {Addition kinetics and spin exchange in the gas phase reaction of the ethyl radical with oxygen},
	journal = {Journal of Physical Chemistry},
	volume = {100},
	number = {16},
	year = {1996},
	note = {ISI Document Delivery No.: UF879Times Cited: 21Cited Reference Count: 58},
	month = {Apr},
	pages = {6561-6571},
	type = {Article},
	abstract = {The kinetics of the addition reaction of O-2 to the ethyl radical has been investigated as a function of temperature (259-425 K) and pressure (1.5-60 bar) using the muon spin relaxation technique in longitudinal magnetic fields. Within this temperature range at 1.5 bar, the chemical reaction is represented by an Arrhenius rate law with an activation energy of -4.4(4) kJ mol(-1) and an apparent frequency factor of 1.3(2) x 10(-12) cm(3) molecule(-1) s(-1). The high-pressure limit of the rate constant at 294 K amounts to k(ch)(infinity) = 8.7(8) x 10(-12) cm(3) molecule(-1) s(-1). Within error, this limit has been reached at 1.5 bar. The rate coefficient for spin exchange, k(ex) = 2.8(2) x 10(-10) cm(3) molecule(-1) s(-1), is collision controlled. The results for k(ch) agree well with experimental literature values, but the temperature dependence is more pronounced than that predicted on the basis of a RRKM extrapolation from low-pressure data. The theoretical basis for the analysis of experimental data is given, and the results are discussed.},
	keywords = {DEPENDENCE, DYNAMICS, LIQUIDS, muonium, O-2, PARAMETERS, RANGE, RATE CONSTANTS, relaxation, SPECTRA},
	isbn = {0022-3654},
	url = {<Go to ISI>://A1996UF87900032},
	author = {Dilger, H. and Schwager, M. and Tregennapiggott, P. L. W. and Roduner, E. and Reid, I. D. and Arseneau, D. J. and Pan, J. J. and Senba, M. and Shelley, M. and Fleming, Donald G.}
}
@article {3006,
	title = {DIOXYGEN AND CARBON-MONOXIDE BINDING TO APOLAR CYCLOPHANE HEMES - DURENE-CAPPED HEMES},
	journal = {Journal of the American Chemical Society},
	volume = {116},
	number = {1},
	year = {1994},
	note = {ISI Document Delivery No.: MT212Times Cited: 40Cited Reference Count: 48},
	month = {Jan},
	pages = {6-14},
	type = {Article},
	abstract = {Detailed solution kinetic and equilibria data (mainly in toluene) are presented for the reversible binding of CO and O2 to the five-coordinate hemes Fe(por)B, where B is 1,5-dicyclohexylimidazole or 1,2-dimethylimidazole (chosen to mimic the R- and T-states, respectively) and por = the dianion of some durene-capped porphyrins with variable length linking methylene straps on either side of the durene moiety (4/4, 5/5, or 7/7 methylenes). Use of spectrophotometric equilibrium titrations from 30 to -50-degrees-C, stopped-flow data, and laser flash photolysis under either CO or CO/O2 mixtures, has allowed for determination of on and off rates, equilibrium constants, and, in the case of the 4/4-system, thermodynamic constants for the binding. Increasing steric hindrance provided by the durene cap, in the order 7/7 < 5/5 < 4/4, is generally less than expected from studies with other heme derivatives; in combination with the complete absence of polarity effects, as within nonpolar distal sites, the durene hemes exhibit poor differentiation between CO and O2. However, the distorted 4/4-derivative discriminates between CO and O2 in a novel way through a {\textquoteright}{\textquoteright}proximal effect{\textquoteright}{\textquoteright} associated with deformation of the porphyrin skeleton from planarity, the effect being largely reflected by an increased CO dissociation rate.},
	keywords = {BINDING, CO, CRYSTAL-STRUCTURE, FREE-BASE, HEMOGLOBIN, IRON(II) PORPHYRINS, LIGAND-BINDING, O-2, O2 BINDING, SPERM WHALE, T-STATE},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1994MT21200002},
	author = {David, S. and James, Brian R. and Dolphin, D. and Traylor, T. G. and Lopez, M. A.}
}
@article {7369,
	title = {SYNTHESIS AND CHARACTERIZATION OF DERIVATIZED CAPPED PORPHYRINS},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {70},
	number = {5},
	year = {1992},
	note = {ISI Document Delivery No.: JL870Times Cited: 4Cited Reference Count: 31},
	month = {May},
	pages = {1366-1374},
	type = {Article},
	abstract = {{The syntheses of porphyrins carrying either a fully hydrophobic cavity with a benzene moiety (32a,b) or a polar cavity with an amidobenzene (32c-d) are described. Terephthaldehyde (1) was converted to benzene-bisalkanoic acids (8, 10) and nitrobenzene-bisalkanoic acids (13 and 16) by using standard methods. The corresponding diacid chlorides 17a-d were used to acylate two equivalents of a beta-unsubstituted pyrrole, and the ketonic groups were reduced by diborane. Following the transformation of the nitro function to the acetamide, appropriate modifications of the ethyl ester functions afforded the key bisformylpyrroles 25a-d. The cyanoacrylate-protected formyl pyrrole derivatives were mono-chlorinated at the alpha-methyl groups and condensed with two equivalents of an alpha-unsubstitutued pyrrole to give the dipyrromethane dimers. Strong aqueous alkali caused saponification of the two ester groups and deprotection of the formyl functions to produce the dipyrromethane dimer 30, which, after thermal decarboxylation, was cyclized intramolecularly in acidic medium to give the porphyrins 32 (n = 4 or 5},
	keywords = {BINDING, CO, HUMAN OXYHEMOGLOBIN, IRON(II), O-2, RESOLUTION, STEREOCHEMISTRY},
	isbn = {0008-4042},
	url = {<Go to ISI>://A1992JL87000017},
	author = {Tang, H. and Wijesekera, T. P. and Dolphin, D.}
}
@article {6898,
	title = {ADDITION AND SPIN EXCHANGE-RATE CONSTANTS BY LONGITUDINAL-FIELD MU-SR - THE MU + NO REACTION},
	journal = {Hyperfine Interactions},
	volume = {65},
	number = {1-4},
	year = {1990},
	note = {ISI Document Delivery No.: EZ856Times Cited: 10Cited Reference Count: 185TH INTERNATIONAL CONF ON MUON SPIN ROTATION RELAXATION AND RESONANCEAPR 09-12, 1990OXFORD, ENGLAND},
	pages = {979-986},
	type = {Proceedings Paper},
	abstract = {{The addition reaction Mu + NO + M {\textendash}> MuNO + M and the spin exchange reaction Mu(arrow-pointing-up) + NO(arrow-pointing-down) {\textendash}> Mu(arrow-pointing-down) + NO (arrow-pointing-up) have been measured by longitudinal field mu-SR at room temperature in the presence of up to 58 atm of N2 as inert collider. The pressure dependence of the longitudinal relaxation rate due to the addition reaction (lambda-c) demonstrates that the system is still in the low pressure regime in this pressure range. The corresponding termolecular rate constant has been determined as k0},
	keywords = {muonium, NO, O-2},
	isbn = {0304-3843},
	url = {<Go to ISI>://A1990EZ85600030},
	author = {Senba, M. and Gonzalez, A. C. and Kempton, J. R. and Arseneau, D. J. and Pan, J. J. and Tempelmann, A. and Fleming, Donald G.}
}
