Bis(phthalocyaninato)lanthanoid(III) (LnPc2) complexes have attracted significant attention for their exceptional optical, electronic and magnetic properties. Crystallization of these compounds usually requires cumbersome methods such as sublimation and electrocrystallization, which is...
Patients with recurrent herpes simplex virus-2 (HSV-2) often are delivered by Caesarean section to minimize exposure of the neonate to the virus. A significant number of anaesthetists do not use regional anaesthesia in these patients for fear of introducing virus into the central nervous system. ~ We would like to report our experience with lumbar epidural anaesthesia in patients with recurrent HSV-2 infections.
Four polymorphs of bis(phthalocyaninato)neodymium(III) were reproducibly and selectively crystallized by the slow evaporation of saturated solutions. The obtained phase depended on the initial oxidation state of the NdPc<sub>2</sub> molecule and the choice of solvent. Single-crystal X-ray diffraction studies were used to correct previous mis-identifications and provide missing coordinates for the γ-phase as well as a detailed comparison of molecular structure and crystal packing in all NdPc<sub>2</sub> polymorphs. The primary feature in all phases is columnar stacking based on parallel π π interactions, with a variety of slip angles within those stacks as well as secondary interactions between them. Chemical redox and acid-base titrations, performed on re-dissolved crystals demonstrate that NdPc<sub>2</sub><sup>+</sup> and NdPc<sub>2</sub><sup>-</sup> are easily obtained through weak oxidizing and reducing agents, respectively. Additionally, we show that the protonated form of the NdPc<sub>2</sub><sup>-</sup> complex has a nearly identical UV-Vis spectra to that of neutral NdPc<sub>2</sub>, explaining some of the confusion over chemical composition in previously published literature.<br>
Four polymorphs of bis(phthalocyaninato)neodymium(III) were reproducibly and selectively crystallized by the slow evaporation of saturated solutions. The obtained phase depended on the initial oxidation state of the NdPc<sub>2</sub> molecule and the choice of solvent. Single-crystal X-ray diffraction studies were used to correct previous mis-identifications and provide missing coordinates for the γ-phase as well as a detailed comparison of molecular structure and crystal packing in all NdPc<sub>2</sub> polymorphs. The primary feature in all phases is columnar stacking based on parallel π π interactions, with a variety of slip angles within those stacks as well as secondary interactions between them. Chemical redox and acid-base titrations, performed on re-dissolved crystals demonstrate that NdPc<sub>2</sub><sup>+</sup> and NdPc<sub>2</sub><sup>-</sup> are easily obtained through weak oxidizing and reducing agents, respectively. Additionally, we show that the protonated form of the NdPc<sub>2</sub><sup>-</sup> complex has a nearly identical UV-Vis spectra to that of neutral NdPc<sub>2</sub>, explaining some of the confusion over chemical composition in previously published literature.<br>
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.