title: Dielectric anisotropy of the single crystal of isopropylviologen copper(I) triiodide.
abstract: Solvothermal reactions of CuI with isopropanol, 4,4'-bipyridine, I(2) and a small amount of water in MeCN produced one coordination compound [isopropylviologen][CuI(3)] (isopropylviologen = N,N'-diisopropyl-4,4'-bipyridinium) (1). The dielectric constants of the single crystal of 1 along the three crystal axes are different with the largest diversity ratio of ∼3.3, showing dielctric anisotropic behavior. Under low temperature (<273 K) or medium electric field frequency range (1 KHz-1 MHz), the dielectric constant of the title compound is nearly unchanged, exhibiting a temperature/frequency-independent characteristics. The crystalline powder of 1 has a low dielectric constant and low dielectric loss in the medium electric field frequency range, which is comparable to the traditional low-k material SiO(2).
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.forename: Zhou
authors.initials: Z
authors.lastname: Yang
authors.forename: Xin-Yi
authors.initials: XY
authors.lastname: Wu
authors.forename: Chun-Yan
authors.initials: CY
authors.lastname: Ni
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Ren
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Lang