Anilinomethylrhodamines: pH Sensitive Probes with Tunable Photophysical Properties by Substituent Effect
摘要:
A series of pH dependent rhodamine analogues possessing an anilino-methyl moiety was developed and shown to exhibit a unique photophysical response to pH. These anilinomethylrhodamines (AnMR) maintain a colorless, non-fluorescent spirocyclic structure at high pH. The spirocyclic structures open in mildly acidic conditions and are weakly fluorescent; however, at very low pH, the fluorescence is greatly enhanced. The equilibrium constants of these processes show a linear response to substituent effects, which was demonstrated by the Hammett equation.
Anilinomethylrhodamines: pH Sensitive Probes with Tunable Photophysical Properties by Substituent Effect
摘要:
A series of pH dependent rhodamine analogues possessing an anilino-methyl moiety was developed and shown to exhibit a unique photophysical response to pH. These anilinomethylrhodamines (AnMR) maintain a colorless, non-fluorescent spirocyclic structure at high pH. The spirocyclic structures open in mildly acidic conditions and are weakly fluorescent; however, at very low pH, the fluorescence is greatly enhanced. The equilibrium constants of these processes show a linear response to substituent effects, which was demonstrated by the Hammett equation.
System and Method for a Three-Dimensional Optical Switch Display Device
申请人:Southern Methodist University
公开号:US20220007005A1
公开(公告)日:2022-01-06
The present invention includes a system, apparatus and method for generating a three-dimensional image and/or printing a three-dimensional structures, the system comprising: a medium comprising an acid-sensitive photoinitiator, a photoacid, monomers, donors, and acceptors, wherein the acceptor has a non-fluorescent state and a fluorescent state, wherein at one wavelength of optical excitation an optical molecular switch molecule has a first state, and at a second state the optical molecular switch molecule fluoresces at a second wavelength of excitation; and at least a first light source and a second light source into the medium, wherein light emitted by the at least first and second light sources are directed to contact the acid-sensitive photoinitiator, wherein a first wavelength activates the photo acid, and the second wavelength triggers polymerization of the monomers.
Anilinomethylrhodamines: pH Sensitive Probes with Tunable Photophysical Properties by Substituent Effect
作者:Quinn A. Best、Chuangjun Liu、Paul D. van Hoveln、Matthew E. McCarroll、Colleen N. Scott
DOI:10.1021/jo401323g
日期:2013.10.18
A series of pH dependent rhodamine analogues possessing an anilino-methyl moiety was developed and shown to exhibit a unique photophysical response to pH. These anilinomethylrhodamines (AnMR) maintain a colorless, non-fluorescent spirocyclic structure at high pH. The spirocyclic structures open in mildly acidic conditions and are weakly fluorescent; however, at very low pH, the fluorescence is greatly enhanced. The equilibrium constants of these processes show a linear response to substituent effects, which was demonstrated by the Hammett equation.