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Meir Lahav The Margaret Thatcher Professor of Chemistry Department of Materials and Interfaces Weizmann Institute of Science Rehovot 76100, Israel Tel. 972-8-9343908 E-mail: [email protected] |
Functional 2- and 3-dimensional Crystals
One of the central challenges of modern materials science is the ability to design and prepare functional materials starting from the atomic or molecular level. The materialization of this goal demands the discovery of new synthetic methods for the preparation of new nano-materials and discovery of new analytical tools with the help of which we may probe the structures of such nano-architectures.
In recent years our scientific efforts were directed toward surface science. Our group has been among the pioneers in applying grazing incidence x-ray diffraction, using coherent x-rays from synchrotron sources, for analyzing the structure of crystallites of nanometer dimensions, formed at liquid interfaces. The ability to analyze the structures of these clusters on the molecular level allowed us to address a number of fundamental problems, that include the following:
- The induced nucleation of super-cooled water, by amphiphilic alcohols spread on drops of water
- Spontaneous resolution of racemates, in two-dimensions, at the air/water interface; model systems for the origin of chirality on earth
- The monitoring of the early stages of crystallization of cholesterol, in relevance to the formation of gall-stones
- Design of synthetic auxiliary molecules for controlling crystal polymorphism, large-scale resolution of enantiomers by crystallization of materials of pharmaceutical interest, etc.
- Structural studies of the dynamics of ionophores (molecules that transfer ions through biological membranes) embedded within membrane-like materials, in relevance to the understanding of the mechanism of ion transfer via membranes
- Self-organization of molecules into multilayers at the interface, en route to crystal formation
- Organometallic supramolecular architectures formed at interfaces and their inter-conversion into superlattices of quantum particles; the latter materials should display unique opto-electronic properties
- Organization of the molecules at the air/solid interface and the role played by molecules of the environment on crystal growth
Recent Publications:
- "A Cyclic Continuous Process for Converting Conglomerates into Optically Pure Enantiomers by Crystallization and Dissolution with the Assistance of 'Tailor-made' Polymers"
D. Zbaida, M. Lahav, K. Drauz, G. Knaup and M. Kottenhahn
Tetrahedron 56, 6645 (2000)
Abstract Full Text in HTML Format Full Text in PDF Format- "Oriented Crystalline Monolayers and Bilayers of 2ª2 Silver(I) Grid Architectures at the Air - Solution Interface: Their Assembly and Crystal Structure Elucidation"
Isabelle Weissbuch, Paul N. W. Baxter, Ivan Kuzmenko, Hagai Cohen, Sidney Cohen, Kristian Kjaer, Paul B. Howes, Jens Als-Nielsen, Jean-Marie Lehn, Leslie Leiserowitz, Meir Lahav
Chemistry, A European Journal 6, 725 (2000)
Abstract Full Text in PDF Format- "Topotactic Release of CdS and Cd1-xMnxS from Solid Thioalkanoates with Ammonia to Yield Quantum Particles Arranged in Layers Within an Organic Composite"
S. Guo, L. Konopny, R. Popovitz-Biro, H. Cohen, M. Sirota, E. Lifshitz, M. Lahav
Adv. Mater. 12, 302 (2000)
Full Text in PDF Format- "From Nucleation to Engineering of Crystalline Architectures at Air-Liquid Interfaces"
Hanna Rapaport, Ivan Kuzmenko, Mary Berfeld, Kristian Kjaer, Jens Als-Nielsen, Ronit Popovitz-Biro, Isabelle Weissbuch, Meir Lahav, and Leslie Leiserowitz
J. Phys. Chem. B, Feature Article, 104, 1399 (2000)
Abstract Full Text in HTML Format Full Text in PDF Format- "Use of Diastereomeric Interactions To Probe the Inplane Attachment of Water-Soluble Molecules to the Polar Head Groups of Langmuir Films of Cu--Amino Acid Complexes"
Maria Berfeld, Ivan Kuzmenko, Isabelle Weissbuch, Hagai Cohen, Paul B. Howes, Kristian Kjaer, Jens Als-Nielsen, Leslie Leiserowitz, and Meir Lahav
J. Phys. Chem. B 103, 6891 (1999)
Abstract Full Text in HTML Format Full Text in PDF Format- "Thioalkanoates as Site-Directing Nucleating Centers for the Preparation of Patterns of CdS Nanoparticles within 3-D Crystals and LB Films of Cd Alkanoates"
Shouwu Guo, Leandro Konopny, Ronit Popovitz-Biro, Hagai Cohen, Horia Porteanu, Efrat Lifshitz, and Meir Lahav
J. Amer. Chem. Soc. 121, 9589 (1999)
Abstract Full Text in HTML Format Full Text in PDF Format- "Detection of Chiral Disorder in Langmuir Monolayers Undergoing Spontaneous Chiral Segregation"
Ivan Kuzmenko, Kristian Kjaer, Jens Als-Nielsen, Meir Lahav, and Leslie Leiserowitz
J. Amer. Chem. Soc. 121, 2657 (1999)
Abstract Full Text in HTML Format Full Text in PDF Format- "Crystalline Cyclic Peptide Nanotubes at Interfaces"
Hanna Rapaport, Hui Sun Kim, Kristian Kjaer, Paul B. Howes, Sidney Cohen, Jens Als-Nielsen, M. Reza Ghadiri, Leslie Leiserowitz, and Meir Lahav
J. Amer. Chem. Soc. 121, 1186 (1999)
Abstract Full Text in HTML Format Full Text in PDF Format- "Self-Assembly at the Air-Water Interface. In-Situ Preparation of Thin Films of Metal Ion Grid Architectures"
Isabelle Weissbuch, Paul N. W. Baxter, Sidney Cohen, Hagai Cohen, Kristian Kjaer, Pau B. Howes, Jens Als-Nielsen, Gary S. Hanan, Ulrich S. Schubert, Jean-Marie Lehn, Leslie Leiserowitz, and Meir Lahav
J. Amer. Chem. Soc. 120, 4850 (1998)
Abstract Full Text in HTML Format Full Text in PDF Format- "Structural Characterization of Valinomycin and Nonactin at the Air-Solution Interface by Grazing Incidence X-ray Diffraction"
Hanna Rapaport, Ivan Kuzmenko, Kristian Kjaer, Paul Howes, Wim Bouwman, Jens Als-Nielsen, Leslie Leiserowitz, and Meir Lahav
J. Amer. Chem. Soc. 119, 11211 (1997)
Abstract Full Text in HTML Format Full Text in PDF Format- "Separation of Enantiomers and Racemate Formation in Two-Dimensional Crystals at the Water Surface from Racemic -Amino Acid Amphiphiles: Design and Structure"
Isabelle Weissbuch, Maria Berfeld, Wim Bouwman, Kristian Kjaer, Jens Als-Nielsen, Meir Lahav, and Leslie Leiserowitz
J. Amer. Chem. Soc. 119, 933 (1997)
Abstract Full Text in HTML Format Full Text in PDF Format
