Croconaine Rotaxane Dye with 984 nm Absorption: Wavelength-Selective Photothermal Heating.

ABSTRACT: Croconaines are an emerging class of near-infrared dyes that are useful for various sensing, photothermal, optoelectronic, and photoacoustic applications. Previous work encapsulated a dumbbell-shaped croconaine dye whose structure contains two thiophene flanking units inside a tetralactam macrocycle and produced a croconaine rotaxane 1 with a narrow 824 nm absorption band. Herein, a new rotaxane 2 is reported that encapsulates a croconaine dye with two thienothiophene flanking units. The new croconaine rotaxane 2 exhibits a narrow 984 nm absorption band that is distinct from the 824 nm absorption of rotaxane 1. Photothermal heating experiments showed that an 830 nm diode laser selectively heats a solution containing rotaxane 1, with no heating of a soluti

SUBMITTER: McGarraugh HH 

PROVIDER: S-EPMC6774672 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature