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Tailor-made Synthesis

Nitroxide mediated controlled radical polymerization (NMRP) and Grignard metathesis polymerisation (GRIM) are used for diverse polymer chitecture guaranteeing control in molecular weight, low polydispersity and variable composition.

 

Examples are

 

I. Functional Homopolymers

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Side-chain crystalline poly(perylene
bisimides): PPerAcr  		 Side-chain amorphous
triphenylamines: PvTPAs		 Main-chain conjuated polymers:
Poly(3-hexylthiophene) (P3HTs)

 

 

II. Block copolymers with single functionality

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PS-block-amorphous-crystalline PPerAcr: PS-block-PvTPAs amorphous-crystalline PS-block-P3HT, PtBA-block-P3HT: crystalline-amorphous

 

 

III. Fully functionalized side chain block copolymers

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PvTAA-block-PPerAcr: amorphous-crystalline

 

 

IV. Conjugated main chain block copolymers

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P3HT-block-PPerAcr (crystalline-crystalline)

 

In the field of n-type semiconductors, diverse structures of perylene bisimides were developed using unsymetrical substitution of perylene bisimide core resulting in crystalline, liquid crystalline and hydrogen bonding derivatives. 

V. Unsymmetrical Perylene bisimides             VI. Unsymmetrical Perylene imide imidazole
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In the field of light harvesting dyes for applications in solar cells secondary donor antenna groups are introduced to improve absorption and to retard recombination kinetics.

VII. Donor - antenna dyes

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N 719    Ru-TPA  Ru-TPD

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Improvement in absorption as well as retardation of recombination