52243-87-5Relevant articles and documents
The Host-Guest Properties Observed between the Viologens and Cyclopentanocucurbit[6]uril
Cheng, Si-Yuan,Qu, Yun-Xia,Tao, Zhu,Zhou, Kai-Zhi,Wei, Lian-Tong,Wang, Cong,Zhao, Wei-Wei,Jiang, Dao-Fa,Ma, Pei-Hua
, p. 601 - 607 (2020/01/24)
The interactions between cyclopentanocucurbit[6]uril (abbreviated as CyP6Q[6]) and a series of dialkyl-4,4′-bipyridinium and diaryl-4,4′-bipyridinium dicationic guest molecules, where the alkyl group is CH3(CH2)n with n = 0-6 (expressed as G1 to G7) and the aryl group is phenylene (G8) and xylene (G9), have been investigated in aqueous solution using 1H NMR spectroscopy, isothermal titration calorimetry (ITC), and electronic absorption spectroscopy. Our results show that G1 and G2 form 1: 1 host-guest inclusion complexes with CyP6Q[6], in which the bipyridinium core is partially embedded in the cavity of CyP6Q[6]. G3-G9 form 2: 1 dumbbell-type host-guest inclusion complexes, in which the substituents are encapsulated by CyP6Q[6]. At the same time, CyP6Q[6] was compared with several other cucurbit[n]urils (Q[n]s) and their derivatives, such as Q[6], Q[7], and TMeQ[6], which have been reported to interact with this type of guest molecule. In its binding mode, CyP6Q[6] shows many interesting and different properties, and this difference was mainly reflected with G1 and G2.
The side chain template effect in viologen on the formation of polypseudorotaxane architecture: Six novel metal coordination polymers and their properties
Li, Li,Yue, Jun-Ming,Qiao, Yong-Zhen,Niu, Yun-Yin,Hou, Hong-Wei
, p. 3835 - 3842 (2013/07/05)
The reaction of CuSCN (or CuCl2) in the presence of excess KSCN directed by viologen-based linear templates in a dimethyl formamide-methanol system affords six coordination polymers, {(MV)[Cu2(SCN) 4]}n (1, MV2+ = 1,1′-dimethyl-4,4′- bipyridinium), {(PrV)[Cu2(SCN)4]}n (2, PrV 2+ = 1,1′-dipropyl-4,4′-bipyridinium), {(iPV)[Cu 2(SCN)4]}n (3, iPV2+ = 1,1′-diisopropyl-4,4′-bipyridinium), [(1-iBV)Cu2(SCN) 3]n (4, 1-iBV2+ = 1-isobutyl-4,4′- bipyridinium), {(iBV)[Cu2(SCN)4]}n (5, iBV 2+ = 1,1′-diisobutyl-4,4′-bipyridinium), and {(PtV)[Cu2(SCN)4]}n (6, PtV2+ = 1,1′-dipentyl-4,4′-bipyridinium). The [Cu2(SCN) 4]n anion in compounds 1, 3 and 5 adopts an infinite two-dimensional polypseudorotaxane architecture and proved effectively that the stoppers at the end can enhance the polyrotaxane formation in the crystalline state, whereas the anion moieties in compounds 2 and 6 exhibit one-dimensional linear architectures, suggesting dethreading from envelopes once solidifying from solution phase. Compound 4 was found to be a two-dimensional coordination polymer with the organic ligand carrying a single charge. The side chain template effect of substituted group, UV-Vis diffuse reflectance spectra in the solid state and TGA properties of the six complexes are investigated.
Photochromism of Viologen Crystals
Kamogawa, Hiroyoshi,Suzuki, Tsuyoshi
, p. 794 - 796 (2007/10/02)
Some viologen crystals bearing a p-toluenesulfonate anion as a counter ion were shown to exhibit reversible photoreductions (photochromism) either in air or under vacuum, whereas in a poly(N-vinyl-2-pyrrolidone) matrix all investigated viologens indicated reversible photocolor developments.Amphoteric ions such as 1,1'-bis(3-sulfonatopropyl)-4,4'-bipyridinium also developed colors with high stabilities.
