Zusammenfassung der Ressource
Nucleic
Acids
- Electromagnetic Force
- Only relevant force for this scale
- All intermolecular forces
- Charge mediated
- Attractive and Repulsive
- F(r)=-(nCm1m2)/r^(n+1)
- Long range interactions disappear for n>3
- Lennard- Jones type potential graphs
- Positive energy = Repulsive force
- Negative energy = Attractive Force
- Lennard- Jones: V(r)= -A/r^6 + B/r^12
- Polymers
- Made up of monomers
- Joined via covalent bonds
- Degree of polymization = number of
monomers = N
- Mass of polymer= Nm(mon)
- Types
- Homopolymers
- Same monomer
- Heteropolymer
- Different monomers
- Random
- Block
- Flexibility
- Coil
- Rod
- Depends on length scale
- Isomerisation
- Isotatic
- Chemical group
always in same
position
- Syndiotactic
- Chemical group swaps sides
- Atactic
- Chemical group in random positon
- Topology
- Linear
- Ring
- Branched
- Molecular Conformations
- Free Jointed Chain (FJC) Model
- Mean squared value= Cn*n*l^2
- Cn=Flory Characteristic Ratio – average of all Ci, converging for C∞
- l= bond length
- n= number of bond lengths
- No correlations between all θij, and all θij
allowable
- Equivalent FJC
- N=L^2/(
- L= Contour length