title: Solution self-assembly, spontaneous deprotonation, and crystal structures of bipyrazolate-bridged metallomacrocycles with dimetal centers.
abstract: A series of nanosized cavity-containing bipyrazolate-bridged metallomacrocycles with dimetal centers, namely, {[(bpy)M]8L4}(NO3)8 [L=3,3',5,5'-tetramethyl-4,4'-bipyrazolyl, Pd, Pt; 1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene), Pd; and 1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbiphenyl, Pd], {[(phen)M]8L4}(NO3)8 [L=3,3',5,5'-tetramethyl-4,4'-bipyrazolyl, Pd, Pt; 1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene, Pd; and 1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbiphenyl, Pd], {[(bpy)Pd]6L3}(NO3)6 [L=1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene,], {[(phen)Pd]6L3}(NO3)6 [L=1,4-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene,], {[(bpy)Pd]4L2}(NO3)4 [L=1,3-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene, and 1,2-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene,], and {[(phen)Pd]4L2}(NO3)4 [L=1,3-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene, and 1,2-bis-4'-(3',5'-dimethyl)-pyrazolylbenzene,] (where bpy=2,2'-bipyridine and phen=1,10-phenanthroline) have been synthesized through a directed self-assembly approach that involves spontaneous deprotonation of the 1H-bipyrazolyl ligands in aqueous solution. These complexes, with weak Pd(II)...Pd(II) or Pt(II)...Pt(II) interactions, have been characterized by elemental analysis, 1H and 13C NMR, cold-spray ionization or electrospray ionization mass spectrometry, UV-visible spectroscopy, and luminescence spectroscopy. Complexes and have also been characterized by single-crystal X-ray diffraction analysis.
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, and Graduate School of the Chinese Academy of Sciences, Beijing 100080, People's Republic of China. syu@iccas.ac.cn
authors.forename: Shu-Yan
authors.initials: SY
authors.lastname: Yu
authors.forename: Hai-Ping
authors.initials: HP
authors.lastname: Huang
authors.forename: Sheng-Hui
authors.initials: SH
authors.lastname: Li
authors.forename: Qing
authors.initials: Q
authors.lastname: Jiao
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: Biao
authors.initials: B
authors.lastname: Wu
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Sei
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Yuan-Jiang
authors.initials: YJ
authors.lastname: Pan
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Ma
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D019281:Dimerization; D008024:Ligands; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D011522:Protons; D011724:Pyridazines / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry
chemical_list: D008024:Ligands; D047028:Macrocyclic Compounds; D009942:Organometallic Compounds; D011522:Protons; D011724:Pyridazines; D012996:Solutions; D010984:Platinum; D010165:Palladium