What are the major steps in supramolecular catalysis?
Contents
- 2.1 Orienting reactive and labile groups.
- 2.2 Raising the effective substrate concentration.
- 2.3 Stabilizing transition state.
How many steps are involved in supramolecular catalysis?
three steps
Supramolecular catalytic reactions involve binding of a well defined substrate (reactant) to the receptor (catalyst) and the catalytic process complete in three steps (see Figure 1) 1) Selective binding of reactant(s) based on their recognition by the receptor that may bear reactive group(s).
What is supramolecular reactivity and catalysis?
Supramolecular reactivity and catalysis thus involve two main steps: (i) Binding: which selects the substrate, and. (ii) Transformation: of the bound species into products within the supermolecule formed.
What is catalysis in green chemistry?
Catalysis is one of the fundamental pillars of green chemistry, the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances.
What is a supramolecular enzyme?
Artificial enzymes based on supramolecular scaffolds†Enzymes are nanometer-sized molecules with three-dimensional structures created by the folding and self-assembly of polymeric chain-like components through supramolecular interactions.
What are chiral catalysts?
The majority of chiral catalysts, also known as asymmetric catalysts, are formed from chiral ligands with transition metals. Even at low substrate-to-catalyst ratios, these catalysts are highly efficient, making them excellent synthetic tools, even at industrial scales.
What are green catalyst and examples?
Examples include the acid catalysed esterification of carboxylic acids and alcohols and the gas-phase catalysed reaction of ozone destruction in the stratosphere in which chlorine free radicals, from CFCs, act as catalysts for the reaction.
What are green catalysts give two examples?
Industrial Catalysts
| Chemical | Chemical precursor | Example end uses |
|---|---|---|
| Ethylene oxide | Ethylene | Polyester fiber, automotive engine antifreeze, production of polyethylene terephthalate |
| Propylene oxide | Propylene | Polyurethane systems |
| Cyclohexanone | Cyclohexane | Nylon 6,6 |
| Phthalic anhydride | o-Xylene | Plasticizers |