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http://dx.doi.org/10.5012/bkcs.2011.32.4.1258

Self-assembly and Mechanism of L-Alanine-based Dihydrazide Derivative as Excellent Gelator of Organic Solvents  

Wang, Chuan-Sheng (School of Materials and Metallurgy, Northeastern University)
Wang, Xiao-Hong (Department of Chemistry, Shenyang University of Chemical Technology)
Li, Zhi-Yuan (Department of Chemistry, Shenyang University of Chemical Technology)
Wei, Wei (Department of Chemistry, Shenyang University of Chemical Technology)
Shi, Zhong-Liang (Department of Chemistry, Shenyang University of Chemical Technology)
Sui, Zhi-Tong (School of Materials and Metallurgy, Northeastern University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.4, 2011 , pp. 1258-1262 More about this Journal
Abstract
A new organogelator, L-Alanine dihydrazide derivative can self-assemble in various organic solvents and turned them into thermally reversible physical supramolecular organogels at extremely low concentrations (< 2 wt %). The gel-sol phase transition temperatures ($T_{GS}$) were determined as a function of gelator concentration and the corresponding enthalpies (${\Delta}H_g$) were extracted. Scanning electron microscopy (SEM) measurements revealed that the interspaces of fiber-like network structures were diminished with the increasing of the LMOG concentration. FT-IR spectroscopy studies revealed that hydrogen-bonding and hydrophobic interaction were the driving forces for the formation of the gels. Based on the data of XRD and molecular modeling, the possible packing modes for the formation of organogelator aggregates were proposed.
Keywords
L-Alanine; Hydrazide derivatives; Organogel; Gelator; Self-assembly; Hydrogen bonding;
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