N‐Boc‐Protected 1,2‐Diphenylethylenediamine‐Based Dendritic Organogels with Multiple‐Stimulus‐Responsive Properties |
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| Authors: | Ji Liu Dr Yu Feng Zhi‐Xiong Liu Zhi‐Chao Yan Yan‐Mei He Prof Dr Chen‐Yang Liu Prof Dr Qing‐Hua Fan |
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| Institution: | 1. Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry and Graduate School, Chinese Academy of Sciences (CAS), Beijing 100190 (P. R. China), Fax: (+86)?10‐6255‐4472;2. Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, CAS, Beijing 100190 (P. R. China) |
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| Abstract: | A new class of poly(benzyl ether) dendrimers, decorated in their cores with N‐Boc‐protected 1,2‐diphenylethylenediamine groups, were synthesized and fully characterized. It was found that the gelation capability of these dendrimers was highly dependent on dendrimer generation, and the second‐generation dendrimer (R,R)‐G2DPENBoc proved to be a highly efficient organogelator. A number of experiments (SEM, TEM, FTIR spectroscopy, 1H NMR spectroscopy, rheological measurements, UV/Vis absorption spectroscopy, CD, and XRD) revealed that these dendritic molecules self‐assembled into elastically interpenetrating one‐dimensional nanostructures in organogels. The hydrogen bonding, π–π, and solvophobic interactions were found to be the main driving forces for formation of the gels. Most interestingly, these dendritic organogels exhibited smart multiple‐stimulus‐responsive behavior upon exposure to environmental stimuli such as temperature, anions, and mechanical stress. |
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| Keywords: | dendrimers gels multi‐responsiveness self‐assembly |
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