Synthesis and self-assembly of novel hydrazide derivatives containing multi-alkoxy chains with different lengths
摘要:
We report on the synthesis and self-assembly of two novel types of hydrazide derivatives, e.g. 1, 4-bis[(3,4,5-trialkoxyphenyl)-dihydrazide]-2,5-diethylphthalate (C-Tn, n=7, 10, 12 and 16) and N', N'-bis[3,4,5-tris(dodecyloxy)benzamido]-pyromellitic diimide (BI-C-T12). They were confirmed to exhibit strong gelation ability in several apolar organic solvents, such as benzene, 1,2-dichloroethane and chloroform. SEM images of the xerogels revealed that the gels consist of twist fibrous aggregates. Both FT-IR and H-1 NMR studies confirmed that the intermolecular hydrogen bonding and van der Waals interactions were the major driving forces for the self-assembly of the molecules during gelling. (C) 2008 Elsevier B.V. All rights reserved.
Synthesis and self-assembly of novel hydrazide derivatives containing multi-alkoxy chains with different lengths
作者:Xiao-bing Zhang、Min Li
DOI:10.1016/j.molstruc.2008.06.018
日期:2008.12
We report on the synthesis and self-assembly of two novel types of hydrazide derivatives, e.g. 1, 4-bis[(3,4,5-trialkoxyphenyl)-dihydrazide]-2,5-diethylphthalate (C-Tn, n=7, 10, 12 and 16) and N', N'-bis[3,4,5-tris(dodecyloxy)benzamido]-pyromellitic diimide (BI-C-T12). They were confirmed to exhibit strong gelation ability in several apolar organic solvents, such as benzene, 1,2-dichloroethane and chloroform. SEM images of the xerogels revealed that the gels consist of twist fibrous aggregates. Both FT-IR and H-1 NMR studies confirmed that the intermolecular hydrogen bonding and van der Waals interactions were the major driving forces for the self-assembly of the molecules during gelling. (C) 2008 Elsevier B.V. All rights reserved.
Esters of Pyromellitic Acid. Part I. Esters of Achiral Alcohols: Regioselective Synthesis of Partial and Mixed Pyromellitate Esters, Mechanism of Transesterification in the Quantitative Esterification of the Pyromellitate System Using Orthoformate Esters, and a Facile Synthesis of the Ortho Pyromellitate Diester Substitution Pattern
作者:John B. Paine
DOI:10.1021/jo800543w
日期:2008.7.1
diesters, by further esterification followed by hydrogenolysis. Refluxing orthoformate triesters were found to effect quantitative esterification of the pyromellitate system under autocatalytic conditions; minor ester exchange with pre-existing esters (0−5% of total product) was ascribed to reversible anhydride formation. For generalesterification with alcohols, partial ester acid chlorides were obtained