Helicity Control in the Aggregation of Achiral Squaraine Dyes in Solution and Thin Films.

ABSTRACT: Squaraine dyes are well known for their strong absorption in the visible regime. Reports on chiral squaraine dyes are, however, scarce. To address this gap, we here report two novel chiral squaraine dyes and their achiral counterparts. The presented dyes are aggregated in solution and in thin films. A detailed chiroptical study shows that thin films formed by co-assembling the chiral dye with its achiral counterpart exhibit exceptional photophysical properties. The circular dichroism (CD) of the co-assembled structures reaches a maximum when just 25 % of the chiral dye are present in the mixture. The solid structures with the highest relative CD effect are achieved when the chiral dye is used solely as a director, rather than the structural component. The chiroptical data are further suppo

SUBMITTER: Rosch AT 

PROVIDER: S-EPMC7839690 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature