What molecular group or structures, which are not aromatic, have strong affinity to aromatic rings?

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Adam B Shapiro

There is something called a cation-pi interaction, in which positive charges interact with the pi structure of aromatic rings.

https://en.wikipedia.org/wiki/Cation%E2%80%93pi_interaction

Jing liang Li

Hi Adam, thanks you for the very useful information.

Mikhail Nekrasov

Aromatic rings in dyes are frequently hydrophobic or have hydrophobic parts, so you can try fatty acids for lipophilic interaction.

Thank you Mikhail.