Supramolecular and Photoinorganic Chemistry

Definition and development of supra molecular chemistry, nature of supramolecular interactions (ion pairing, ion-dipole, dipole-dipole, dipole-induced dipole and ion-induced dipole, van der Waals or Dispersion, hydrogen bonding, cation-π, anion- π,  closed shell, π π stacking).

Classification of host-guest compounds, pre-organisation and complementarity: thermodynamic and kinetic effects.

Cation Binding: complexation by crown ether, cryptands (spherical and tetrahedral recognition), spherands, lariat ethers and podands. Recognition of ammonium ions. Synthesis: template effect and high dilution. biological significance: valinomycin and nonactin.

Anion Binding: Basic concepts of anion binding, cyclophanes and guanidinium-based       receptors, neutral receptors: zwitterions, amide-based receptors. Biological significance:         phosphate and sulphate binding properties.

1. Binding and recognition of neutral molecules.
2. Coreceptor molecules and multiple recognition: dinuclear and polynuclear metal ion cryptates, linear recognition of molecular length by ditopic coreceptors, heterotopic coreceptors: cyclophane receptors, amphiphilic receptors, large molecular cages, multiple recognition in metalloreceptors.

1. Supramolecular reactivity: transport processes and carrier design. carriers: cation, anion and coupled transport process.
2. Supramolecular devices: supramolecular photochemistry, supramolecular electronic, ionic and switching devices.
3. Supramolecular catalysis: supramolecular   metallocatalysis,  bimolecular and abiotic catalysis.

Photochemical laws, physical properties of the electronically exited states : dipole moment,           acid base strengths, redox potential, geometry of some  electronically exited molecules,         Wigner’s  spin conservation rule. Life time of excited electronic states of atoms and    molecules.

Photochemical reactions of octahedral complexes of  Cr(III): Some properties of ligand field excited states and energy level diagrams, Photosubstitution (aquation) reactions of Cr(III) complexes.

Photosubstitution, photoisomerisation and photoredox reactions of square planar complexes of Pt(II). Photochemical splitting of water and photochemistry of [Ru (bpy) ₃]⁺², TiO₂ as an important photocatalyst.