Supramolecular Chemistry and Nanochemistry
Code
7276
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Química
Credits
6.0
Teacher in charge
João Carlos dos Santos Silva e Pereira de Lima
Total hours
50
Teaching language
Português
Objectives
The students should gain knowledge about the fundamental aspects of Supramolecular Chemistry and Photochemistry, that will allow and be the base for developments in research context. They should obtain the ability to design, synthetize and charaterize molecular devices, in an interdisciplinary approach. Fundamental knowledge in photochemistry and supramolecular chemistry are put together with skills aquired in chemical synthesis and structural characterization tecchniques (NMR, MS, ICP, X-Ray), fluorescence and microscopy.
Subject matter
Supramolecular Chemistry: Molecular recognition. Self-assembly and self-organization. Programed molecules, programed supramolecular systems. Self-assembling o multicomponent systems. Self-assembly based on hydrogen bonding. Supramolecular catalysis.
Dendrimers: Convergent and divergent synthesis. Molecular containers, Synthesis and characterization of carcerands and carceplexes. Template synthesis of catenanes, rotaxanes and knots.
Photochemistry: Absorption and emission of light. Geometry, dipole moment, redox potential and pKa of excited states. Photophysical processes of excited states. energy transfer, electron transfer and proton transfer in the excited state. Photo-reduction, photo-oxidation, cyclo adition reactions. Wodward-Hoffmann rules for electrocyclic reactions. Chemiluminescence. Solar energy conversion cycles, photocatalysis, photochromism. Mechanism of vision, photosynthesis.
Molecular devices: Top- bottom and Bottom-up approaches to the construction of nanostructures. Molecular machines based in conformational movements (molecular rotors and related systems). Hybrid systems: artificial devices coupled to biological systems, Modern techniques of microscopy and applications in the field of molecular devices. Chemosensors, principles of operation. Simple and complex molecular switches. Implementation of basic logic functions ((YES, NOT, AND, OR, XOR). Interface of supramolecular systems with heterogeneous phases. Production of nanoparticles, derivatization of nanoparticles with supramolecular systems. Conductive polymers. Organic superconductors. Smart materials. Molecular electronics and molecular wires.
Bibliography
1. Supramolecular Chemistry: Concepts and Perspectives, Jean-Marie Lehn, VCH, Weinheim, Germany, 1995.
2. Supramolecular Chemistry, Paul D. Beer, Philip A. Gale, David K. Smith, Oxford Chemistry Primers, Oxford University Press, Oxford, UK, 1999.
3. Supramolecular Chemistry, Jonathan W. Steed, Jerry L. Atwood, Wiley, Chichester, UK, 2000.
4. Supramolecular Photochemistry, Vincenzo Balzani, Franco Scandola, Ellis Horwood, Chichester, UK, 1987
Teaching method
The program of Supramolecular and Nanochemistry comprises 22 hours of lectures and 24 hours of lab work. The students have access to a web page where all the relevant information related to the curricular unit is available.
Evaluation method
A final exam and reports (less than 10 pages) covering some of the lab works that are discussed in the presence of an evaluation board. The presentation of a seminar about a subject to define can also take place. The final grade is the arithmetic average of the exam classification and the lab classification, accounting for the lab work, reports and discussion.