Anthracene Capped Isobenzofuran: A Synthon for the Preparations of Iptycenes and Iptycene Quinones
作者:Bao-Jian Pei、Wing-Hong Chan、Albert W. M. Lee
DOI:10.1021/ol200309v
日期:2011.4.1
Anthracene capped isobenzofuran 5 (5,6-(9,10-dihydroanthracen-9,10-yl)isobenzofuran) was synthesized for the first time. It is a highly reactive and versatile synthon for the synthesis of iptycene derivatives via Diels−Alder reactions. Cycloadducts 10 could be readily deoxygenated to iptycenes 11. Two new reactions of PhI(OAc)2/TfOH have been explored. Endoxides 10 were directly oxidized to iptycene
Carboxylic acids as anchoring components on aluminum oxide for the alignment relay technique of single-walled carbon nanotubes
作者:Monika R. Snowdon、Shirley Wang、Nour Mashmoushi、Scott W. Hopkins、Derek J. Schipper
DOI:10.1039/d0nj05154c
日期:——
The alignment of semiconducting single-walled carbonnanotubes (SWCNTs) can contribute to faster, lighter, and more efficient transistors, but the process needs optimization for mass production. We have previously described an alignment relay technique (ART) to facilitate the simultaneousorientation, diameter, and length of SWCNTs when placed on a substrate surface. To expand ART's utility, compatibility
半导体单壁碳纳米管(SWCNT)的排列可有助于更快,更轻,更高效的晶体管,但是该工艺需要优化以进行批量生产。先前我们已经描述了一种对准中继技术(ART),当将SWCNT放置在基板表面上时,它可以同时实现SWCNT的定向,直径和长度。为了扩展ART的效用,需要实现与多种表面的兼容性。在这里,我们报道了ART在Al 2 O 3上的无效性,并且我们建议分子镊子需要一种羧酸才能与氧化铝结合。我们用两种液晶溶剂测试了新的羧酸部分,以改善在二氧化硅以及原子层沉积的氧化铝和α-Al上的取向2 O 3基板。我们表明,相对于第一代ART分子,羧酸改性将Al 2 O 3表面上的SWCNTs排列提高了20%。我们使用量子化学计算来探索纳米管与茂金属分子镊子的相互作用。我们的计算结果表明,茂金属在茂茂茂衍生物的结合口袋中的取向非常重要。我们的工作优化了ART在各种电子设备基板上沉积的适用性。
Tritriptycene: a D3h C62 hydrocarbon with three U-shaped cavities
作者:Abdollah. Bashir-Hashemi、Harold. Hart、Donald L. Ward
DOI:10.1021/ja00281a038
日期:1986.10
Reduction of DMAD-anthracene adducts. Synthesis and conformations of substituted cyclodecadienes
作者:Ashok Anantanarayan、Harold Hart
DOI:10.1021/jo00003a019
日期:1991.2
A general method for reducing DMAD-anthracene adducts to the corresponding enediols is described. Thus, the ester groups of 1 were reduced without C = C reduction using the DIBAH-nBuLi ''ate'' complex to give previously unknown 2 in high yield. Analogous enediols 5-7 were similarly prepared. Base treatment of dibromide 3 and dithiol 9, both prepared from 2 by standard methods, gave conformationally rigid dithiacyclodecadiene 10. With o-, m-, and p-xylylenedithiols, dibromide 3 gave respectively the conformationally labile cyclophanes 12 and 13 and the rigid cyclophane 14. Tetrabromide 16 and dithiol 9 gave cuppedophane 17, but tetrabromide 18 and 9 formed bis-m-cyclophane 19 instead.
USE OF 1,2,4,5-TETRABROMOBENZENE AS A 1,4-BENZADIYNE EQUIVALENT: anti- AND syn-1,4,5,8-TETRAHYDROANTHRACENE 1,4:5,8-DIEPOXIDES
作者:Shahlai, Khalil、Acquaah, Samuel Osafo、Hart, Harold、Leazer, John、Smith, Amos B.