title: Cracking the framework of bulk CuCN with flexible bipyrazolyl-based ligands to assemble [CuCN]n-based coordination polymers.
abstract: Solvothermal reactions of CuCN with a set of flexible bipyrazolyl-based ligands with different spacer lengths [(dmpz)(CH(2))(n)(dmpz)] (dmpz = 3,5-dimethyl-pyrazolyl; n = 1-6) gave rise to six [CuCN](n)-based coordination polymers [(CuCN)(3)L](n) (1: L = dmpzm; 2: L = dmpze), [(CuCN)(2)L](n) (3: L = dmpzpr; 4: L = dmpzb; 5: L = dmpzp; 6: L = dmpzh). Compounds 1-6were characterized by elemental analysis, IR, powder X-ray diffraction and single-crystal X-ray diffraction. 1 or 2 exhibits a 1D scolopendra-like chain assembled from a rare 1D zigzag [CuCN](n) chain with [CN-Cu-CN-Cu-L] (1: L = dmpzm; 2: L = dmpze) side arms. 3 or 4 shows a 2D (6,3) wave-like layer in which [Cu(6)(mu-CN)(6)L(2)](n) (L = dmpzpr or dmpzb) double chains are interconnected by pairs of L bridges. 5 consists of two [CuCN](n) single chains that are linked by dmpzp bridges to form a rare 1D chain with an oblong channel. has a 3D network in which the 2D [Cu(10)(mu-CN)(10)(dmpzh)(3)](n) layers are interconnected by pairs of dmpzh bridges. In addition, the photoluminescent properties of 1-6 in the solid state at ambient temperature were investigated.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Suzhou University, Suzhou 215123, P. R. China.
authors.forename: Ling-Ling
authors.initials: LL
authors.lastname: Li
authors.forename: Lei-Lei
authors.initials: LL
authors.lastname: Liu
authors.forename: Ai-Xia
authors.initials: AX
authors.lastname: Zheng
authors.forename: Yu-Jie
authors.initials: YJ
authors.lastname: Chang
authors.forename: Ming
authors.initials: M
authors.lastname: Dai
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Ren
authors.forename: Hong-Xi
authors.initials: HX
authors.lastname: Li
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Lang