Solution and Solid-State Studies of Doubly Trimethylene-Bridged Tetraalkyl p-Phenylenediamine Diradical Dication Conformations
摘要:
X-ray crystallographic structures are reported for 1(Me)(2+)(SbCl6-)(2)center dot 2CH(3)CN, 2(Et)(2+) (SbF6-)(2)center dot 2CH(3)CN center dot 2CH(2)Cl(2), and 1(iPr)(2+)(SbF6-)(2), which also contained unresolved solvent and is in a completely different conformation than the methyl- and ethyl-substituted compounds. A quite different structure of 1(Me)(2+)(SbF6-)(2) than that previously published was obtained upon crystallizing it from a mixture rich in monocation. It does not contain close intramolecular PD+,PD+ contacts but has close intermolecular ones. Low temperature NMR spectra of 1(Me)(2+) and 1(Et)(2+) in 2:1 CD3OD/CD3CN showed that both contain three conformations of all-gauche NCCC unit material with close intramolecular PD+,PD+ contacts. In addition to the both PD+ ring syn and anti material that had been seen in the crystal structure of 1(Me)(2+)(SbF6-)(2)center dot 2CH(3)CN published previously, an unsymmetrical conformation having one PD+ ring syn and the other anti (abbreviated uns) was seen, and the relative amounts of these conformations were significantly different for 1(Me)(2+) and 1(Et)(2+). Calculations that correctly obtain the relative amounts of both the methyl- and ethyl-substituted material as well as changes in the optical spectra between 1(Me)(2+) and 1(Et)(2+), which contains much less of the uns conformation, are reported.
MULTI-ELECTRON REDOX ACTIVE MOLECULES FOR ENERGY STORAGE APPLICATIONS
申请人:UChicago Argonne, LLC
公开号:US20170062862A1
公开(公告)日:2017-03-02
A non-aqueous redox flow battery includes a catholyte including a compound of formula (I) or a compound of formula (II):
Where X
1
is a moiety of formula I-A or I-B:
Multi-electron redox active molecules for energy storage applications
申请人:UChicago Argonne, LLC
公开号:US10026984B2
公开(公告)日:2018-07-17
A non-aqueous redox flow battery includes a catholyte including a compound of formula (I) or a compound of formula (II):
Where X1 is a moiety of formula I-A or I-B:
非水氧化还原液流电池包括一种阴溶液,其中包括式(I)化合物或式(II)化合物:
其中 X1 是式 I-A 或 I-B 的分子:
Synthesis and Redox Behavior of Wurster Blue Cyclophanes
Solution and Solid-State Studies of Doubly Trimethylene-Bridged Tetraalkyl <i>p</i>-Phenylenediamine Diradical Dication Conformations
作者:Almaz S. Jalilov、Gaoquan Li、Stephen F. Nelsen、Ilia A. Guzei、Qin Wu
DOI:10.1021/ja100322k
日期:2010.5.5
X-ray crystallographic structures are reported for 1(Me)(2+)(SbCl6-)(2)center dot 2CH(3)CN, 2(Et)(2+) (SbF6-)(2)center dot 2CH(3)CN center dot 2CH(2)Cl(2), and 1(iPr)(2+)(SbF6-)(2), which also contained unresolved solvent and is in a completely different conformation than the methyl- and ethyl-substituted compounds. A quite different structure of 1(Me)(2+)(SbF6-)(2) than that previously published was obtained upon crystallizing it from a mixture rich in monocation. It does not contain close intramolecular PD+,PD+ contacts but has close intermolecular ones. Low temperature NMR spectra of 1(Me)(2+) and 1(Et)(2+) in 2:1 CD3OD/CD3CN showed that both contain three conformations of all-gauche NCCC unit material with close intramolecular PD+,PD+ contacts. In addition to the both PD+ ring syn and anti material that had been seen in the crystal structure of 1(Me)(2+)(SbF6-)(2)center dot 2CH(3)CN published previously, an unsymmetrical conformation having one PD+ ring syn and the other anti (abbreviated uns) was seen, and the relative amounts of these conformations were significantly different for 1(Me)(2+) and 1(Et)(2+). Calculations that correctly obtain the relative amounts of both the methyl- and ethyl-substituted material as well as changes in the optical spectra between 1(Me)(2+) and 1(Et)(2+), which contains much less of the uns conformation, are reported.