Advanced Coordination Chemistry — DU B.Sc (hons) Chemistry Previous Year Question Papers

Semester VII 1. a) Elucidate the significance of non-covalent interactions in organizing OD, ID, 2D components into a bulk 3D solid material. b. Distinguish with an example the differences between a Metal-organic framework (MOF) and a coordination polymer. c) Explain the solvothermal process of synthesis of metal-organic frameworks (MOF), focusing on the benefits and drawbacks regarding its scalability and environmental impact. 2. a) Differentiate between single metal-noded nets and metal cluster-noded nets. b). Discuss the impact on porosity of a material when two-dimensional layers are linked by 1D pillars to create a 3D framework. c) Explain the physical properties of metal-organic frameworks? 3. a) Explain the role and applications of metal-organic frameworks in gas storage and separation? b) External stimuli or ligand modification in multinuclear metal arrays can be modified through spin-state and magnetic properties. Elaborate. c) Discuss the factors that render MOFs as perfect porous materials. 4. a) Explain the process of molecular self-assembly and give the differences between intra- and intermolecular self-assembly (with examples). b) Supramolecular self-assembly is facilitated by non-covalent interactions. Elaborate on this statement, highlighting the factor of relative strength. c) Discuss the various applications of molecular squares and boxes. 5. a) Self-assembly of phospholipids in aqueous solutions results in the formation of liposome membranes. c) Explain why it is an advantage to use metal-organic frameworks as catalysts in comparison to homo or heterogeneous catalysts. 6. Write down a short note on any three of the following. (a) Self-Assembly of Metal Arrays (b) Hydrogen storage by MOFs (c) Coordination polymers (d) Pillared layer nets