Journal
CHEMICAL SCIENCE
Volume 4, Issue 6, Pages 2557-2563Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3sc50535a
Keywords
-
Categories
Funding
- NSF (USA)
- University of Notre Dame Integrated Imaging Facility
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1058699] Funding Source: National Science Foundation
Ask authors/readers for more resources
A new squaraine rotaxane molecular shuttle exhibits high chemical stability and acts as a deep-red, fluorescent and colorimetric sensor for Cl- anion with reversible, ratiometric response. The molecular design encapsulates a dihydroxyl substituted squaraine dye inside an anthracene-containing tetralactam macrocycle and a clicked capping reaction was used to convert an appropriate pseudorotaxane precursor into a permanently interlocked rotaxane in high yield. Reversible binding of Cl- to the rotaxane in solution, or on the surface of prototype dipsticks, causes lateral displacement of the surrounding macrocycle away from the central squaraine station and a substantial 30-40 nm shift in the squaraine absorption/fluorescence maxima that can be easily detected by the naked eye. The collective attributes of intense absorption/emission and ratiometric response at deep-red wavelengths is a significant advance in optical Cl- sensor performance by an organic molecule.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available