Chemistry behind colour changes - Co pigmentation
6 important questions on Chemistry behind colour changes - Co pigmentation
How are the shift called in this graph caused by copigmentation?
Hyperchromic shift is a shift in intensity.
What is the:
- bathochromic shift
- hypsochromic shift
- hyperchromic shift
- hypochromic shift
Shift of absorption spectrum goes to the richt (bigger numbers) so absorbs more red (red shift) and gives therfore a more green colour.
Hypsochromic shift:
Shift of absorption spectrum goes to the left (lower numbers) so absorbs more blue (blue shift) and gives therefore a more yellow colour.
Hyperchromic shift:
Increased intensity
Hypochromic shift:
Decreases intensity
What is the differencee between the hypsochromic and hypochromic shift?
Hypochromic shift gives a decreased intensity.
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What is the difference between inter and intra compigmentation and what do self-association and metal-complexes belong to?
Inter molecular copigmentation is done by the formation of one molecule it self.
What are the properties of the blue pigment from commelina communis, the blue plant?
- Stable in concentrated form not in diluteld form (becoms colourless)
- Bild out of anthocyanins
- Is not dyalisble, so a big molecule
- Has a negative charge
How do these tho compounds form flower produce a blue colour?
htere are 6 anthocyanins and 6 flavone and the antocyanins form a bond wiht two metal ions
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