Aggregates of 12 carotenoids in hydrated polar solvents & thin films were compared.
Structural features were clearly related to J- or H-type aggregation behavior.
Strongly coupled H-type aggregation of γ-carotene was observed for the first time.
First reports on β-cryptoxanthin and (9Z)-β-carotene aggregates are presented.
First reports on aggregates of zeaxanthin mono- and diesters are provided.