Picosecond spectroscopy applications

Deak J, Richard L, Pereira M, Chui H-L and Miller R J D 1994 Picosecond phase grating spectroscopy applications to bioenergetics and protein dynamics Meth. Enzymol. 232 322-60... 

Sitzman, E. V. Eisental, K. H. Application of Picosecond Spectroscopy to Chemistry, Reidel 1984. 

E. V. Sitzman and K. B. Eisenthal, in Applications of Picosecond Spectroscopy to Chemistry Reidel Publishing, Dordrecht, The Netherlands, 1983, pp. 41-63. 

The reactive intermediates leading to the charge-transfer deligation of the bis(arene)iron(II) acceptors in Eqs. (59) and (60) are examined by time-resolved picosecond spectroscopy immediately following the application of an 18-psecond laser pulse. The time-resolved spectrum from the (HMB)2Fe2+ complex with ferrocene consists of the superposition of the... 

A very large number of papers presented at the First International Laser Conference in 1987 give a complete representation of photochemical research involving the use of lasers. Extensive applications to luminescence and photochemistry are reported. A book edited by Letokhov on laser picosecond spectroscopy and photochemistry of biomolecules is largely... 

An extremely exciting achievement is the use of real time femtosecond probing of transition states in chemical reactions . The method, which shows promise for the study of bimolecular and unimolecular reactions, has already been applied to the decomposition of ICN. Rulliere has discussed the application of picosecond spectroscopy to study a variety of elementary processes. 

Eisenthal, K.B., Ed. (1983), Applications of Picosecond Spectroscopy to Chemistry, NATO ASI Series Reidel Dordrecht. 

Picosecond Spectroscopy and Applications to Chemical and Biological Systems... 

Picosecond spectroscopy enables one to observe ultrafast events in great detail as a reaction evolves. Most picosecond laser systems currently rely on optical multichannel detectors (OMCDs) as a means by which spectra of transient species and states are recorded and their formation and decay kinetics measured. In this paper, we describe some early optical detection methods used to obtain picosecond spectroscopic data. Also we present examples of the application of picosecond absorption and emission spectroscopy to such mechanistic problems as the photodissociation of haloaromatic compounds, the visual transduction process, and inter-molecular photoinitiated electron transfer. 

Picosecond spectroscopy provides a means of studying ultrafast events which occur in physical, chemical, and biological processes. Several types of laser systems are currently available which possess time resolution ranging from less than one picosecond to several picoseconds. These systems can be used to observe transient states and species involved in a reaction and to measure their formation and decay kinetics by means of picosecond absorption, emission and Raman spectroscopy. Technological advances in lasers and optical detection systems have permitted an increasing number of photochemical reactions to be studied in. greater detail than was previously possible. Several recent reviews (1-4) have been written which describe these picosecond laser systems and several applications of them... 

The versatility of OMCDs and, of course, advances in laser technology have been responsible for the increasing numbers of applications of picosecond spectroscopy to problems in areas of physics, chemistry, and biology. 

Experimental studies of ions association became feasible with the advent of relaxation techniques, picosecond spectroscopy, and ESR spectroscopy. Pioneering work in this field was done by Eigen, e.g.298), who studied the association of inorganic ions in aqueous solutions. Recent development of field-modulation technique335) allows for detailed investigations of ions association in low polarity media. This technique requires very low concentrations of ions in the investigated systems - a condition met by solutions involving low polarity solvents. Its application to systems such as tetrabutyl ammonium picrate in... 

There is still a gap between our models of liquid-state reactions and the often bewildering complexity of real chemical systems. Progress in shortening the gap will probably come only from the application of a variety of methods to this problem. The full promise of picosecond spectroscopy techniques for studying the details of the dynamics of reactive events in liquids has yet to be realized. How deeply can these methods probe the dynamics Computer simulations, another source of experimental information in reacting systems, are only beginning to be exploited. "" The description by direct computer simulation of both primary and secondary recombination dynamics, for example, would yield a wealth of information that could be used to test theories. 

Automation In data acquisition and treatment can be aimed at a variety of objectives inherent in the above-mentioned factors. It should be pointed out that physical and physico-chemical kinetic factors play a decisive role in the reduction of human Intervention. The acquisition of data at a high rate imposed by the technique Itself (e.g. picosecond spectroscopy [19]) or by the system Investigated (e.g. meaurements of rates of reactions with half-lives of the order of a few milliseconds by the stopped-flow methodology [20,21]) demand the use of a computerized system without which application of the particular spectroscopic technique or method would not be feasible. On the other hand, the so-called microprocessor-controlled spectroscopy , widely commercialized at present, broadens the scope and facilitates the operator s work by eliminating various sources of error. 

G. A. Kenney-Wallace Nonlinear Optical Spectroscopy and Molecular Dynamics in Liquids in Applications of Picosecond Spectroscopy ed. K. B. Eisenthal, D. Reidel Publishing Company,... 

Xie X and Simon J D 1989 Picosecond time-resolved circular dichroism spectroscopy experimental details and applications Rev. Sol. Instrum. 60 2614-27... 

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