Lee Jae-Seung, Regatte Ravinder R, Jerschow Alexej
Department of Radiology, New York University Langone Medical Center, New York, NY 10016, USA; Department of Chemistry, New York University, New York, NY 10003, USA.
Department of Radiology, New York University Langone Medical Center, New York, NY 10016, USA.
J Magn Reson. 2017 Aug;281:141-150. doi: 10.1016/j.jmr.2017.05.015. Epub 2017 May 31.
The mechanism of magnetization transfer (MT) in a lyotropic liquid crystal made of sodium dodecyl sulfate, decanol, and water molecules is investigated by using deuterated molecules and single- and dual-frequency RF irradiations. The resulting Z-spectra suggest that the decanol molecules are mainly responsible for the MT effects in this system, through proton exchange to water. This is further confirmed by monitoring the relaxation of dipolar order, which allows one to estimate the transfer rate of magnetization from decanol to water. The potential benefits of using dual-frequency RF irradiation for inducing MT effects are explored through numerical solutions to a MT model based on Provotorov's partial saturation theory.
通过使用氘代分子以及单频和双频射频辐射，研究了由十二烷基硫酸钠、癸醇和水分子构成的溶致液晶中的磁化转移（MT）机制。所得的Z谱表明，癸醇分子通过与水的质子交换，在该体系的MT效应中起主要作用。监测偶极序的弛豫进一步证实了这一点，这使得人们能够估计磁化从癸醇到水的转移速率。通过基于普罗沃托罗夫部分饱和理论的MT模型的数值解，探索了使用双频射频辐射诱导MT效应的潜在益处。
