Title, Idee chemii kwantowej. Author, Lucjan Piela. Publisher, Wydawnictwo Naukowe PWN, ISBN, , Length, pages . Autorzy, Piela, L. Treść / Zawartość. Piela. Uniwersytet Warszawski, Pracownia Chemi Kwantowej ul. Pasteura 1, Warszawa, [email protected] Lucjan Piela Naukowe PWN, Poland from “ Idee chemii kwantowej”, © PWN, ✶ the postal stamps of several countries have been used (Austria pp. 30,
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Sciences USA, These data are still utilized by all current neutrino-mass experiments. Professor Piela together with Leszek Stolarczyk proposed in a new kind of isomers. The ground state electronic energy represents a complicated function of the nuclear coordinates.
In he became the first recipient of the Annual Medal of the International Academy of Quantum Molecular Sciences and later, inhe ppiela a chmeia of this Academy. Piela with his collaborators explained this phenomenon by showing why the gap plays so critical role in the range of exchange interaction [L. Professor Piela has shown that all equations that emerge in the global optimisation procedures based on these phenomena are particular cases of a more general mathematical scheme [L.
Even for relatively small molecules this function may have many minima in the corresponding “energy landscape”, very often myriads of minima, each of them corresponding to a stable configuration of the nuclei. In all other methods the target function the hypersurface was kept intact. His research topic fhemia the influence of hindered rotation on neutron scattering off small organic molecules.
When the energy band gap is non-zero, the exchange energy is of the short-range, while for the zero gap i. His early papers on the correlation of electronic motion in the ethylene and benzene molecules contained important ideas on this subject, later developed further by himself and others. Initially he employed the explicitly correlated basis introduced earlier by James and Coolidge.
Professor Piela serving as a dean of the Chemistry Department of the University of Warsaw has introduced profound changes described in L. TheochemK. Scheraga, Biopolymers,26, S Main scientific activity of Professor Piela is focused in three domains: He also devoted considerable effort to the study of various spectroscopic properties of excited states of the hydrogen molecule obtaining numerous accurate potential energy curves which have been invaluable not only in interpreting spectroscopic experiments, but also in other fields of science.
Using the invariance Piela and Stolarczyk introduced a novel technique of calculation of the long-range electrostatic forces. The key step was using the multipole expansion, and then sum up exactly the appearing multipole-multipole contributions. The obtained modified multipole expansion gave results invariant also with respect to the arbitrary choice of the unit cell.
On some pecularities of intermolecular and intramolecular interactions.
Letters 15, L. Selected other publications L. The states would result from a cooperative effect of successive electron transfers from several electron donor to electron acceptor moieties of the molecule.
These were seminal theoretical developments never before attempted for any molecule. The idea of deformation is based on a destabilisation of all minima of a function by introducing smoothing techniques Diffusion Equation Method, DEM, distance scaling method, wkantowa method, also related to them: S14, J.
Lucjan Piela – Wikipedia, wolna encyklopedia
S14, Xhemia. Bruxelles 92, J. Series 43, L. In fact all of these attempts based on some smoothing of the energy landscape. Lucjan Piela is the author of about hundred papers published in international journals. Uniwersytet Warszawski, Pracownia Chemi Kwantowej ul.
His work in this area, which pointed out the importance of many-body effects, is fully appreciated only now when new information on many-body forces became available from spectroscopy.
Long-range interaction of the unit cells the periodic structure is composed of turned out to represent a serious numerical problem with an effort increasing exponentially with polymer sizesince the interactions of a reference cell with the rest of the polymer decayed very slowly.
Thanks to enormous effort of the protein folding community it is possible to design such amino acid sequences, which fold to the desired protein 3D structure.
Piela Delta 9, 6 L. USA, 90, The long-range forces in molecules and polymers Any theory of regular polymers keantowa.
He was also one of the pioneers in the field of ab initio studies of the nonadditivity of intermolecular forces. The molecules, if synthesised, might be considered as molecular memory, molecular switches, etc.