|
 |
|
|
 |
Takanobu Ishida
Professor Emeritus
B.S., 1953, M.S., 1955, Kyoto University; M.S., 1958, New York University; Ph.D., 1964, Massachusetts Institute of Technology; Research Associate, Brookhaven National Laboratory, 1964-66; Research Associate, Belfer Graduate School of Science, Yeshiva University, 1966-68; Visiting Associate Professor and Professor, University of Rochester, 1973-79; Visiting Scientist, Max Planck Institut fuer Chemie (Otto-Hahn-Institut), Mainz, Germany, 1986.
Tel: (631) 632-7894
Fax: (631) 689-0262
Email: tishida@notes.cc.sunysb.edu
Publications |
|
|
|
|
PHYSICAL CHEMISTRY:
ISOTOPE EFFECTS, ISOTOPE SEPARATIO, ELECTROCHEMISTRY
Our research interest is best described by considering that it has two focal points, one on chemical and physical effects of stable isotope substitutions in molecules and the second on various aspects of separation of stable isotopes, this field being an application of the first. In the basic studies of isotope effects, we explore differences in the equilibrium and kinetic properties among isotopic molecules and use the information to elucidate intra- and inter-molecular forces, usually assuming the validity of Born-Oppenheimer approximation. The knowledge from the isotope effect studies is also applied to develop efficient processes for enriching stable isotopes, in particular, of the light elements, H, C, N, O, and S.
Separations involving isotopes of the same element are one of the most difficult of all chemical separation processes. These studies involve a perception of new separation principles and implementation of the method into a workable pilot plant which uses affordable feed material and the least amount of energy and gives highest possible separation factor and overall reaction rates. In its course one may get involved with basic isotope effect studies, statistical thermodynamics, molecular dynamics, molecular orbital calculations, molecular spectroscopy, reaction kinetics including catalysis, surface chemistry, chemical engineering designs, and a lot of basic chemistry.
Recently, our interest in heterogeneous electrocatalyses for isotope exchange reactions has led us into the field of chemically modified electrodes and reevaluation of chemistry of nitric oxide. Examples: (a) Development of a hydrophobic catalyst for hydrogen isotope exchange between dihydrogen and liquid water, the catalyst whose activity will be in situ regeneratable. (b) Development of an ultramicro electrochemical probe for a fast, highly sensitive, and reproducible determination of nitric oxide in biological cellular systems. Nitric oxide is produced by mammalian cells as a short-lived intercellular messenger. It participates in blood pressure control, neurotransmission and inflammation. In and around the cells it operates in sub-ppm and often in the ppb concentration levels, and the current knowledge of nitric oxide is often insufficient for the pathological investigations. We are reassessing the properties of this free radical.
|
|
|
|
