783-81-3Relevant articles and documents
Voltage Imaging with a NIR-Absorbing Phosphine Oxide Rhodamine Voltage Reporter
Gonzalez, Monica A.,Walker, Alison S.,Cao, Kevin J.,Lazzari-Dean, Julia R.,Settineri, Nicholas S.,Kong, Eui Ju,Kramer, Richard H.,Miller, Evan W.
, p. 2304 - 2314 (2021/02/16)
The development of fluorescent dyes that emit and absorb light at wavelengths greater than 700 nm and that respond to biochemical and biophysical events in living systems remains an outstanding challenge for noninvasive optical imaging. Here, we report the design, synthesis, and application of near-infrared (NIR)-absorbing and -emitting optical voltmeter based on a sulfonated, phosphine-oxide (po) rhodamine for voltage imaging in intact retinas. We find that po-rhodamine based voltage reporters, or poRhoVRs, display NIR excitation and emission profiles at greater than 700 nm, show a range of voltage sensitivities (13 to 43% ΔF/F per 100 mV in HEK cells), and can be combined with existing optical sensors, like Ca2+-sensitive fluorescent proteins (GCaMP), and actuators, like light-activated opsins ChannelRhodopsin-2 (ChR2). Simultaneous voltage and Ca2+ imaging reveals differences in activity dynamics in rat hippocampal neurons, and pairing poRhoVR with blue-light based ChR2 affords all-optical electrophysiology. In ex vivo retinas isolated from a mouse model of retinal degeneration, poRhoVR, together with GCaMP-based Ca2+ imaging and traditional multielectrode array (MEA) recording, can provide a comprehensive physiological activity profile of neuronal activity, revealing differences in voltage and Ca2+ dynamics within hyperactive networks of the mouse retina. Taken together, these experiments establish that poRhoVR will open new horizons in optical interrogation of cellular and neuronal physiology in intact systems.
Development of improved dual-diazonium reagents for faster crosslinking of tobacco mosaic virus to form hydrogels
Ma, Dejun,Chen, Zhuoyue,Yi, Long,Xi, Zhen
, p. 29070 - 29077 (2019/09/30)
New bench-stable reagents with two diazonium sites were designed and synthesized for protein crosslinking. Because of the faster diazonium-tyrosine coupling reaction, hydrogels from the crosslinking of tobacco mosaic virus and the reagent DDA-3 could be p
Near-Infrared Phosphorus-Substituted Rhodamine with Emission Wavelength above 700 nm for Bioimaging
Chai, Xiaoyun,Cui, Xiaoyan,Wang, Baogang,Yang, Fan,Cai, Yi,Wu, Qiuye,Wang, Ting
supporting information, p. 16754 - 16758 (2015/11/16)
Phosphorus has been successfully fused into a classic rhodamine framework, in which it replaces the bridging oxygen atom to give a series of phosphorus-substituted rhodamines (PRs). Because of the electron-accepting properties of the phosphorus moiety, wh
