Self-assembly and host-guest interaction of metallomacrocycles using fluorescent dipyrazole linker with dimetallic clips.
By employing diimine ligands coordinated dimetallic clips ([(bpy)2Pd2(NO3)2](NO3)2 or [(phen)2Pd2(NO3)2](NO3)2, where bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline) as the corner and anthracene-, naphthalene-, and benzene-based dipyrazolate dianions as the linker, a series of positively charged metallomacrocycles ([M4L2]4+ or [M8L4]8+) have been synthesized through a directed self-assembly method in aqueous solution. Every macrocycle has a cavity to bind solvent molecules or anions. The structures were characterized by elemental analysis, 1H and 13C NMR, electrospray ionization mass spectrometry, and single crystal X-ray diffraction analysis for compound 1 x 4 PF6(-) (1 = {[(bpy)Pd]4L(1)2}4+), 3 x 4 PF6(-) x 8 CH3CN x H2O (3 = {[(bpy)Pd]4L(2)2}4+), and 7 x 4 PF6(-) x 6 H2O (7 = {[(bpy)Pd]4L(5)2}4+). The 1:1 host-guest complexation for anthracene-based dipyrazolate-bridged macrocycles with aromatic guests was investigated via UV-vis and fluorescent titration.
Ning
Guo-Hong
GH
Laboratory for Self-Assembly Chemistry, Department of Chemistry, Renmin University of China, Beijing 100872, China.
Yao
Liao-Yuan
LY
Liu
Li-Xia
LX
Xie
Ting-Zheng
TZ
Li
Yi-Zhi
YZ
Qin
Yu
Y
Pan
Yuan-Jiang
YJ
Yu
Shu-Yan
SY
D015082:2,2'-Dipyridyl / Q000138:chemical synthesis / Q000737:chemistry; D000873:Anthracenes / Q000138:chemical synthesis / Q000737:chemistry; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010618:Phenanthrolines / Q000138:chemical synthesis / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D014961:X-Ray Diffraction
D000873:Anthracenes; D047028:Macrocyclic Compounds; D009281:Naphthalenes; D009942:Organometallic Compounds; D010618:Phenanthrolines; D011720:Pyrazoles; C031721:naphthalene; D015082:2,2'-Dipyridyl; C034020:anthracene; C025205:1,10-phenanthroline