1. Driven evolution of a constitutional dynamic library of molecular helices toward the selective generation of (2x2) gridlike arrays under the pressure of metal ion coordination
- Author
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Jean-Louis Schmitt, Nicolas Giuseppone, Jean-Marie Lehn, Institut de Science et d'ingénierie supramoléculaires (ISIS), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Chaire Chimie des Interactions Moléculaires, Collège de France (CdF (institution)), and Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)
- Subjects
010405 organic chemistry ,Stereochemistry ,Chemistry ,Depolymerization ,Regioselectivity ,General Chemistry ,010402 general chemistry ,01 natural sciences ,Biochemistry ,Catalysis ,Dissociation (chemistry) ,0104 chemical sciences ,Ion ,Metal ,Crystallography ,Colloid and Surface Chemistry ,Polymerization ,visual_art ,visual_art.visual_art_medium ,[CHIM]Chemical Sciences ,Self-assembly - Abstract
Constitutional dynamics, self-assembly, and helical-folding control are brought together in the efficient Sc(OTf)3/microwave-catalyzed transimination of helical oligohydrazone strands, yielding highly diverse dynamic libraries of interconverting constituents through assembly, dissociation, and exchange of components. The transimination-type mechanism of the ScIII-promoted exchange, as well as its regioselectivity, occurring only at the extremities of the helical strands, allow one to perform directional terminal polymerization/depolymerization processes when starting with dissymmetric strands. A particular library is subsequently brought to express quantitatively [2 x 2] gridlike metallosupramolecular arrays in the presence of ZnII ions by component recombination generating the correct ligand from the dynamic set of interconverting strands. This behavior represents a process of driven evolution of a constitutional dynamic chemical system under the pressure (coordination interaction) of an external effector (metal ions).
- Published
- 2006
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