Conducting Nanofibers and Organogels Derived from the Self-Assembly of Tetrathiafulvalene-Appended Dipeptides

详细信息    查看全文

• 作者：Siva Krishna Mohan Nalluri ; Nadezhda Shivarova ; Alexander L. Kanibolotsky ; Mischa Zelzer ; Swati Gupta ; Pim W. J. M. Frederix ; Peter J. Skabara ; Helena Gleskova ; Rein V. Ulijn
• 刊名：Langmuir
• 出版年：2014
• 出版时间：October 21, 2014
• 年：2014
• 卷：30
• 期：41
• 页码：12429-12437
• 全文大小：515K
• ISSN：1520-5827

文摘

We demonstrate the nonaqueous self-assembly of a low-molecular-mass organic gelator based on an electroactive p-type tetrathiafulvalene (TTF)鈥揹ipeptide bioconjugate. We show that a TTF moiety appended with diphenylalanine amide derivative (TTF-FF-NH₂) self-assembles into one-dimensional nanofibers that further lead to the formation of self-supporting organogels in chloroform and ethyl acetate. Upon doping of the gels with electron acceptors (TCNQ/iodine vapor), stable two-component charge transfer gels are produced in chloroform and ethyl acetate. These gels are characterized by various spectroscopy (UV鈥搗is鈥揘IR, FTIR, and CD), microscopy (AFM and TEM), rheology, and cyclic voltammetry techniques. Furthermore, conductivity measurements performed on TTF-FF-NH₂ xerogel nanofiber networks formed between gold electrodes on a glass surface indicate that these nanofibers show a remarkable enhancement in the conductivity after doping with TCNQ.