Ball-and-Socket Stacking of Supercharged Geodesic Polyarenes: Bonding by Interstitial Lithium Ions
摘要:
Unprecedented supramolecular stacks of highly reduced geodesic pi-systems were prepared by the reduction of the derivatized fullerenes Me5C60H and Ph5C60H and corannulene with lithium metal (R5C605-/Cor(4-)/9Li(+)). The host-guest assemblies form because of the enhanced electrostatic interactions between the lithium cations and the anionic moieties, in addition to the structural compatibility between the curved hydrocarbons. The high stability of these new supramolecular assemblies (heterodimers) enables the introduction of another organization motif to the system. This is achieved by using tethered corannulenes as host molecules, which leads to the formation of tethered bis-heterodimers ((Me5C605-/Cor(4-))(2)(CH2)(8)/18Li(+)).
Sharing Orbitals: Ultrafast Excited State Deactivations with Different Outcomes in Bucky Ferrocenes and Ruthenocenes
作者:Dirk M. Guldi、G. M. Aminur Rahman、Renata Marczak、Yutaka Matsuo、Masahiro Yamanaka、Eiichi Nakamura
DOI:10.1021/ja061120v
日期:2006.7.1
(i.e., femtosecond and nanoseconds) to pulse radiolysis, were employed to examine excited-state interactions. In the excitedstates, bucky ferrocene conjugates are dominated by rapid charge separation reactions (0.8 +/- 0.1 ps) to yield metastable radical ion pairs. The radical ion pair lifetimes vary between 27 and 39 ps. No charge separation was, however, found in the corresponding bucky ruthenocence
60}, isolated from the remaining 50 spsup 2} carbon atoms by five surrounding spsup3} carbon atoms each bearing a phenyl group. The X-ray crystal structure analysis of the thallium complex Tl(eta}sup 5}-Csub 60}Phsub 5}).2.5THF revealed its unique and esthetically pleasing Csub 5} symmetrical molecular structure with the phenyl groups forming a chiral propeller array. The thallium atom is deeply
Photocurrent‐generating fullerenes: New fullerene derivatives bearing a phosphonicacid linker (e.g., C60(C6H4‐Ph‐4)5(CH2)6PO(OH)2) form self‐assembled monolayers (SAMs) on indium tin oxide (ITO) and SnO2 surfaces, and generate both anodic and cathodic photocurrent in the presence of sacrificing reagents.
产生光电流的富勒烯:带有膦酸连接基的新富勒烯衍生物(例如,C 60(C 6 H 4 -Ph-4)5(CH 2)6 PO(OH)2)在铟上形成自组装单层(SAMs)氧化锡(ITO)和SnO 2的表面,并在牺牲剂的存在下同时产生阳极和阴极光电流。
Synthesis of Functionalized Fullerene by Mono-alkylation of Fullerene Cyclopentadienide
作者:Ryo Hamasaki、Yutaka Matsuo、Eiichi Nakamura
DOI:10.1246/cl.2004.328
日期:2004.3
Mono-alkylation reaction of a fullerene cyclopentadienide with a functionalized alkyl halide quantitatively gave a functionalized [60]fullerenederivative that may bear a variety of functional groups and may exhibit high solubility in various solvents.
Single-step synthesis of pentaaryl-monohydro[60]fullerenes through fivefold addition of organocopper reagent to C60
作者:Masaya Sawamura、Hitoshi Iikura、Takayuki Ohama、Ulrich E Hackler、Eiichi Nakamura
DOI:10.1016/s0022-328x(99)00660-9
日期:2000.4
The reaction of an organocopper reagent (ArMgBr/CuBr·SMe2) with C60 was optimized for the fivefold addition forming a novel Cp-type ligand precursor 1,4,11,15,30-pentaaryl-2-hydro[60]fullerene (C60Ar5H, 1), where Ar stands for Ph, 4-CF3C6H4, 4-MeOC6H4, 4-ClC6H4, 4-BuC6H4, 4-PhC6H4, and 1-naphthyl groups. Under the optimized conditions, a large quantity (8.90 g) of C60Ph5H has been synthesized in a