Synthesis and X-ray structural analysis of platinum and ethynyl-platinum corannulenes: supramolecular tectons
作者:Roman Maag、Brian H. Northrop、Anna Butterfield、Anthony Linden、Oliver Zerbe、Young Min Lee、Ki-Whan Chi、Peter J. Stang、Jay S. Siegel
DOI:10.1039/b916020e
日期:——
The synthesis and characterization of two direct platinum (1 and 6a/b) and three ethynyl-platinum corannulene derivatives (2, 8 and 9), bearing 2, 4, or 5 square planar platinum centers, are presented. The structure of the bowl bearing substituents remains comparable to corannulene and the dynamic behavior of the bowl inversion as assessed by VT NMR supports a persistent bowl structure in solution. These platinum-corannulenes are well-structured tectons for the future assembly of coordination Platonic polyhedra.
π-Conjugated Discrete Oligomers Containing Planar and Nonplanar Aromatic Motifs
作者:Ji Li、Anamaria Terec、Yue Wang、Hrishikesh Joshi、Yunpeng Lu、Handong Sun、Mihaiela C. Stuparu
DOI:10.1021/jacs.6b12468
日期:2017.3.1
A new family of π-conjugated oligomers featuring a nonplanar polycyclicaromatichydrocarbon, corannulene, and a planar aromatic unit, thiophene, is synthesized through an iterative metal-catalyzed coupling protocol. The two structural motifs are connected through an acetylene linkage. In the shorter oligomers, a thiophene unit is attached to one or two corannulenes. In the higher analogues, two, three
Syntheses and Properties of Multiferrocenylated Corannulenes
作者:Berit Topolinski、Bernd M. Schmidt、Sergej Schwagerus、Michael Kathan、Dieter Lentz
DOI:10.1002/ejic.201402667
日期:2014.11
The syntheses and properties of corannulenes bearing different numbers and types of ferrocenyl groups are described. Six different monoferrocenylated corannulenes were synthesized, and the crystal structure of 1-corannulenyl-1′-(ferrocenyl)benzene was elucidated by single-crystal X-ray analysis. Further, diferrocenylated corannulenes bearing methyl or trifluoromethyl groups are reported. Buckybowls
描述了具有不同数量和类型的二茂铁基团的芴烯的合成和性质。合成了六种不同的单二茂铁基二茂铁,并通过单晶X射线分析阐明了1-二茂铁基-1'-(二茂铁基)苯的晶体结构。此外,还报道了带有甲基或三氟甲基基团的二铁烯基化二烯。具有四个和五个二茂铁基取代基的 Buckybowls 由四溴环烯和对称的五氯环烯合成。通过单晶 X 射线分析确定了四亚铁基化二烯的分子结构和果壳状晶体堆积。此外,本文提出的所有化合物均在溶液中进行电化学和光学测量。
Structural, Optical, and Electrochemical Properties of Three-Dimensional Push–Pull Corannulenes
作者:Yi-Lin Wu、Mihaiela C. Stuparu、Corinne Boudon、Jean-Paul Gisselbrecht、W. Bernd Schweizer、Kim K. Baldridge、Jay S. Siegel、François Diederich
DOI:10.1021/jo302217n
日期:2012.12.21
Electrochemically active corannulene derivatives with various numbers of electron-donating 4-(N,N-dimethylamino)phenylethynyl (1-4) or electron-withdrawing cyanobutadienyl peripheral substitutents (5-8) were prepared. The latter derivatives resulted from formal [2 + 2] cycloaddition of cyanoolefins to 1-4 followed by retro-electrocyclization. Conformational properties were examined by variable-temperature NMR and X-ray diffraction and opto-electronic properties by electronic absorption/emission spectra and electrochemical measurements; these analyses were corroborated by dispersion-corrected density functional calculations at the level of B97-D/def2-TZVPP. In CH2Cl2, 1-4 exhibit intramolecular charge-transfer (ICT) absorptions at 350-550 nm and green (lambda(em) similar to 540 nm) or orange (600 nm) fluorescence with high quantum yields (56-98%) and are more readily reduced than corannulene by up to 490 mV. The variation of optical gap and redox potentials of 1-4 does not correlate with the number of substituents. Cyanobutadienyl corannulenes 5-8 show red-shifted ICT absorptions with end-absorptions approaching 800 nm. Intersubstituent interactions lead to distortions of the corannulene core and lower the molecular symmetry. NMR, X-ray, and computational studies on 5 and 8 with one cyanobutadienyl substituent suggested the formation of intermolecular corannulene dimers. Bowl-inversion barriers around Delta G(double dagger) = 10-11 kcal/mol were determined for these two molecules.
Tunable Photochemical/Redox Properties of (Phenylthio)<sub>n</sub>corannulenes: Application to a Photovoltaic Device
作者:Angela Steinauer、Anna M. Butterfield、Anthony Linden、Agustin Molina-Ontario、David C. Buck、Robert W. Cotta、Luis Echegoyen、Kim K. Baldridge、Jay S. Siegel
DOI:10.5935/0103-5053.20160072
日期:——
The additive substituent effect of phenylmercapto derivatives of corannulene are investigated by spectroscopic, electrochemical, and computational techniques. The per-substituted phenylmercaptocorannulene is incorporated as a replacement for [6,6]-phenyl-C-61-butyric acid methyl ester (PCBM) in a photovoltaic device.