[EN] PHOTOCHROMIC AND ELECTROCHROMIC DIARYLETHENE COMPOUNDS WITH IMPROVED PHOTOSTABILITY AND SOLUBILITY [FR] COMPOSÉS DIARYLÉTHÈNE PHOTOCHROMIQUES ET ÉLECTROCHROMES PRÉSENTANT UNE PHOTOSTABILITÉ ET UNE SOLUBILITÉ AMÉLIORÉES
Studies on the Conversions of Diols and Cyclic Ethers. Part 48. Dehydration of alcohols and diols on the action of dimethylsulfoxide
作者:Árpád Molnár、Mihály Bartók
DOI:10.1002/hlca.19810640204
日期:1981.3.18
The transformations of 13 alcohols and 13 diols in the presence of a small amount dimethylsulfoxide (1/16 mol) were studied. Relationships were found between the type of the hydroxy compound and the selectivity of the transformation, and conclusions were drawn regarding the transformation mechanism. The ether formation observed with certain alcohols proceeds via a carbenium cation. The reaction conditions
Thermolabile Cross-Linkers for Templating Precise Multicomponent Metal–Organic Framework Pores
作者:Jackson Geary、Andy H. Wong、Dianne J. Xiao
DOI:10.1021/jacs.1c04030
日期:2021.7.14
tertiary ester-based cross-linkers can be used to install well-defined carboxylicacid pairs at precise relative distances and orientations. The tertiary ester linkages remain intact during framework formation but are readily cleaved to reveal freecarboxylicacids upon microwave heating. Successful cross-linker synthesis, framework incorporation, and thermolysis is demonstrated using the mesoporous, terphenyl
Studies on the chemistry of diols and cyclic ethers-52
作者:Árpád Molnár、Mihály Bartók
DOI:10.1016/s0040-4020(01)89939-7
日期:——
zeolite, the dehydration of (±)-2,2,3,4,5,5-hexamethyloxolane () in the vapour phase leads to the formation of 2,3,4,5-tetramethyl-1,5-hexadiene () in a slow process, while -2,2,3,4,5,5-hexamethyloxolane () is converted to 2, 3 ,4 ,5-tetramethyl-2, 4-hexadiene () with high selectivity in a fast reaction. These differences in reaction rate and selectivity indicate that the dehydration of takes place
Acyclic monomers which when cured are reworkable through thermal decomposition
申请人:Cornell Research Foundation, Inc.
公开号:US06355702B1
公开(公告)日:2002-03-12
Compounds containing unsaturated aliphatic moieties which are linked to each other by a tertiary oxycarbonyl containing acyclic moiety are basis for compositions which are cured to polymer networks which are thermally decomposable to provide residue which can be dissolved to allow repair of inoperative assemblies by replacement of inoperative components or recovery or recycling of operative elements which are affixed in assemblies by the cured compositions.