Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 5, Issue 21, Pages 5248-5256Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc01533j
Keywords
-
Funding
- JST/PRESTO [JPMJPR12K5, JPMJPR16P6]
- JSPS KAKENHI [JP15H05482, JP15H01083, JP26107010, JP16H00849, JP26107002]
- Grants-in-Aid for Scientific Research [16H00849, 26107002, 17K05761, 15H05482, 17H05258, 16J08767] Funding Source: KAKEN
Ask authors/readers for more resources
A variety of fluorescent molecular viscosity probes have been widely used for mapping the local viscosity in cells and for monitoring the microenvironments in materials. However, their viscosity-sensing structural design still relies strongly on molecular rotors featuring intramolecular rotational dynamics. Here we report flapping molecules (FLAP) as a ratiometric viscosity-sensing fluorophore that shows polarity-independent dual fluorescence. Viscosity-sensing mechanism is based on a unique V-shaped-to-planar conformational change in the singlet excited state (S-1), in which the flexible motion of an eight-membered ring plays an important role. Fast conformational dynamics have been studied by time-resolved spectroscopies, and the viscochromic properties have been quantitatively analyzed. Application of FLAP to monitoring the curing process of epoxy resins has also been demonstrated, in which other typical environment-sensitive dyes did not work as a local viscosity probe.
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