Browsing by Author "Hsu, Ling-Huang"

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Nanofibrous hydrogels self-assembled from naphthalene diimide (NDI)/amino acid conjugates
(2015-01-01)
Hsu, Ling-Huang
;
Hsu, Shu-Min
;
Wu, Fang-Yi
;
Liu, Yu-Hao
;
Nelli, Srinivasa Rao
The combination of a naphthalene diimide (NDI) group and a single amino-acid of serine (Ser) or lysine (Lys) can be used to promote the formation of a supramolecular hydrogel, which indicates the aromatic amino acid is not necessary to be used in the structural design of NDI-capped small molecule hydrogelators. An equimolar ratio of NDI-Ser and NDI-Lys can form a stable hydrogel under neutral conditions and its gel-to-sol transition temperature is higher than 37 degrees C. This work, as the first example of NDI-containing hydrogelators without aromatic rings in the side chains of amino acids, illustrates a new approach to design NDI-capped supramolecular hydrogels.
The effect of fluorine on supramolecular hydrogelation of 4-fluorobenzyl-capped diphenylalanine
(2015-01-01)
Wu, Fang-Yi
;
Hsu, Shu-Min
;
Cheng, Hsun
;
Hsu, Ling-Huang
;
Lin, Hsin-Chieh
With the replacement of only one hydrogen atomby fluorine, 4-fluorobenzyl-diphenylalanine was able to form a transparent hydrogel, while benzyl-diphenylalanine did not under similar conditions, indicating the remarkable effect of fluorine on supramolecular hydrogelation.