hatcher content part 8

why do we need to characterise supramolecular material?

confirm structure

understand properties and reactivity

what are static techniques?

timescale is irrelevant - properties dont change with time

examples: mass spec, elemental analysis, chemical analysis

what is the electromagnetic spctrum from low to high frequency?

radio

microwave

infrared

visible

ultraviolet

x ray

gamma ray

what are the areas in the UV/vis region?

electronic absorption nm

raman cm^-1

luminescence nm

what is the beer lambert law?

A = e x c x l

A = sbsorption

e = molar extinction coefficient

l = length between sample and detector

what types of transition can you get with uv/vis?

non-bonding → pi antibonding

pi bonding → pi antibonding

non-bonding → sigma antibonding

pi bonding → sigma antibonding

sigma bonding → pi antibonding

sigma bonding → sigma antibonding

what is the effect of conjugation on uv/vis?

bathochromic shift

shift to lower energy

what is an lmct?

ligand to metal charge transfer

molecular pi bonding orbital of ligand → molecular sigma antibonding orbital of metal

what is an mlct?

a metal to ligand charge transfer

molecular pi bonding orbital of metal → molecular pi antibonding orbital of ligand