A New Generation of Pentiptycene-Derived Light-Gated Molecular Brakes
Date Issued
2015
Date
2015
Author(s)
Hou, Fen-Miao
Abstract
Molecular brake is a type of molecular devices that could reversibly slow down the motions of a molecular subunit through external stimuli. We have reported a series of light- and electrochemically driven molecular brakes using a rigid and H-shaped pentiptycene group as a four-bladed rotor. In this thesis, we designed molecule 3, which consists of a pentiptycene rotor, an indane brake-unit, and an indane stator, as a new generation of light-gated molecular brake. Experimental results show that rotation of the pentiptycene rotor is fast in (E)-3 but slow in (Z)-3 at 298 K. Furthermore, compound 3 can be reversibly and repetitive switched by light with a net efficiency of 26 % in n-hexane. In addition, compound 3 has the properties of aggregation-induced emission (AIE-effect). A combination of the luminescence and brake properties allows one to prove the concept of free rotor effect on photoluminescence, which cannot be achieved with our previous molecular brake systems.
Subjects
molecular brake
pentiptycene
free-rotor effect
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02223147-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):c6042a63ef9f16a329c6bacbffe21b8f