title: Novel thermochromism relating to supramolecular cuprophilic interaction: design, synthesis, and luminescence of copper(I) pyrazolate trimer and polymer.
abstract: Solvothermal reactions of 4-(pyrid-4'-yl)-3,5-dimethylpyrazole (HPpz) with CuBr in two mixed solvents, NH3.H2O/EtOH and NH3.H2O/MeCN, afforded respectively a copper(I) trimer, [Cu(Ppz)]3(1), and a polymer, {[Cu(Ppz)]3[CuCN] 3} (2), both containing the [Cu(Ppz)]3 entity as a building block. The products were found to be photoluminescent and, more interestingly, when cooled from room temperature to 10 K, they showed a blue shift followed by a red shift (hereafter shortened to a red-after-blue shift) of emission.
authors.affiliation: Department of Chemistry, Shantou University, Guangdong, People's Republic of China.
authors.forename: Jing-Xiang
authors.initials: JX
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: He
authors.forename: Ye-Gao
authors.initials: YG
authors.lastname: Yin
authors.forename: Mei-Hong
authors.initials: MH
authors.lastname: Hu
authors.forename: Dan
authors.initials: D
authors.lastname: Li
authors.forename: Xiao-Chun
authors.initials: XC
authors.lastname: Huang
mesh_terms: D001965:Bromides / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D019281:Dimerization; D049449:Luminescence; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001965:Bromides; D009942:Organometallic Compounds; D011720:Pyrazoles; C408079:cupric bromide; D003300:Copper