Abstract
3,3′-ditetradecyloxacarbocyanine (DiOC14(3)) and 3,3′-Dioctadecyloxacarbocyanine (DiOC18(3)) are lipophilic carbocyanine dyes with a conjugated polymethine backbone and two long hydrocarbon tails. In this paper, we report the formation of Davydov-split aggregates of DiOC14(3) and DiOC18(3) in methanol/water mixtures with and without ammonia, which show a blue-shifted H-band and a red-shifted J-band with respect to the monomer band in their UV–vis absorption spectra. The Davydov-split aggregates of DiOC14(3) show a fiber-like morphology in the absence of ammonia and a vesicle-like morphology in the presence of ammonia. While the Davydov-split aggregates of DiOC18(3) show a vesicle-like morphology with the different lamellarities, depending on the presence of ammonia in the methanol/water mixtures. These Davydov-split aggregates with different morphologies are birefringence when being viewed through crossed polarizers, suggesting that they have liquid-crystalline phases. The Davydov-split aggregate fibers and vesicles with liquid-crystalline phases and unique excitations are great potential for photonic applications because the liquid-crystalline order and molecular exciton are synergized.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
