Supramolecular nanofiber formation of macrocyclic dendrimer

Woo Dong Jang, Takuzo Aida

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Novel macrocyclic dendrimers (Scheme 2), having two czs-1,3,5- cyclohexanetricarboxamide (1) or 1,3,5-benzenetricarboxamide units (3) in their core, were synthesized, and their self-assembly behaviors were evaluated in solution. Infrared spectroscopy of cis-1,3,5-cyclohexanetricarboxamide cored dendrimer (1) in CHCl3 indicated that formation of strong hydrogen-bonding interactions is taking place among the core units. The 1H NMR spectrum of 1 in CDCl3 showed broadenings of all the peaks, which were sharpened by adding one drop of CF3CO 2H. GPC analysis showed the formation of self-assembled particles having ultrahigh molecular weight, whose average diameter was evaluated as about 140 nm by DLS measurement. AFM observation of the cast on mica film showed that 1 forms a fibrous assembly of uniform thickness with a diameter of 6 nm. In sharp contrast to 1, 1,3,5-benzenetricarboxamide units cored dendrimer (3) did not form a fibrous assembly under identical conditions because of the twisted arrangement of the core units.

Original languageEnglish
Pages (from-to)7325-7330
Number of pages6
JournalMacromolecules
Volume37
Issue number19
DOIs
Publication statusPublished - 2004 Sep 21

Fingerprint

Dendrimers
Nanofibers
Mica
Self assembly
Infrared spectroscopy
Hydrogen bonds
Molecular weight
Nuclear magnetic resonance

All Science Journal Classification (ASJC) codes

  • Materials Chemistry

Cite this

Jang, Woo Dong ; Aida, Takuzo. / Supramolecular nanofiber formation of macrocyclic dendrimer. In: Macromolecules. 2004 ; Vol. 37, No. 19. pp. 7325-7330.
@article{68a9528c09cd4ec6891d883d4983962b,
title = "Supramolecular nanofiber formation of macrocyclic dendrimer",
abstract = "Novel macrocyclic dendrimers (Scheme 2), having two czs-1,3,5- cyclohexanetricarboxamide (1) or 1,3,5-benzenetricarboxamide units (3) in their core, were synthesized, and their self-assembly behaviors were evaluated in solution. Infrared spectroscopy of cis-1,3,5-cyclohexanetricarboxamide cored dendrimer (1) in CHCl3 indicated that formation of strong hydrogen-bonding interactions is taking place among the core units. The 1H NMR spectrum of 1 in CDCl3 showed broadenings of all the peaks, which were sharpened by adding one drop of CF3CO 2H. GPC analysis showed the formation of self-assembled particles having ultrahigh molecular weight, whose average diameter was evaluated as about 140 nm by DLS measurement. AFM observation of the cast on mica film showed that 1 forms a fibrous assembly of uniform thickness with a diameter of 6 nm. In sharp contrast to 1, 1,3,5-benzenetricarboxamide units cored dendrimer (3) did not form a fibrous assembly under identical conditions because of the twisted arrangement of the core units.",
author = "Jang, {Woo Dong} and Takuzo Aida",
year = "2004",
month = "9",
day = "21",
doi = "10.1021/ma0492364",
language = "English",
volume = "37",
pages = "7325--7330",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "19",

}

Supramolecular nanofiber formation of macrocyclic dendrimer. / Jang, Woo Dong; Aida, Takuzo.

In: Macromolecules, Vol. 37, No. 19, 21.09.2004, p. 7325-7330.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Supramolecular nanofiber formation of macrocyclic dendrimer

AU - Jang, Woo Dong

AU - Aida, Takuzo

PY - 2004/9/21

Y1 - 2004/9/21

N2 - Novel macrocyclic dendrimers (Scheme 2), having two czs-1,3,5- cyclohexanetricarboxamide (1) or 1,3,5-benzenetricarboxamide units (3) in their core, were synthesized, and their self-assembly behaviors were evaluated in solution. Infrared spectroscopy of cis-1,3,5-cyclohexanetricarboxamide cored dendrimer (1) in CHCl3 indicated that formation of strong hydrogen-bonding interactions is taking place among the core units. The 1H NMR spectrum of 1 in CDCl3 showed broadenings of all the peaks, which were sharpened by adding one drop of CF3CO 2H. GPC analysis showed the formation of self-assembled particles having ultrahigh molecular weight, whose average diameter was evaluated as about 140 nm by DLS measurement. AFM observation of the cast on mica film showed that 1 forms a fibrous assembly of uniform thickness with a diameter of 6 nm. In sharp contrast to 1, 1,3,5-benzenetricarboxamide units cored dendrimer (3) did not form a fibrous assembly under identical conditions because of the twisted arrangement of the core units.

AB - Novel macrocyclic dendrimers (Scheme 2), having two czs-1,3,5- cyclohexanetricarboxamide (1) or 1,3,5-benzenetricarboxamide units (3) in their core, were synthesized, and their self-assembly behaviors were evaluated in solution. Infrared spectroscopy of cis-1,3,5-cyclohexanetricarboxamide cored dendrimer (1) in CHCl3 indicated that formation of strong hydrogen-bonding interactions is taking place among the core units. The 1H NMR spectrum of 1 in CDCl3 showed broadenings of all the peaks, which were sharpened by adding one drop of CF3CO 2H. GPC analysis showed the formation of self-assembled particles having ultrahigh molecular weight, whose average diameter was evaluated as about 140 nm by DLS measurement. AFM observation of the cast on mica film showed that 1 forms a fibrous assembly of uniform thickness with a diameter of 6 nm. In sharp contrast to 1, 1,3,5-benzenetricarboxamide units cored dendrimer (3) did not form a fibrous assembly under identical conditions because of the twisted arrangement of the core units.

UR - http://www.scopus.com/inward/record.url?scp=4744347104&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4744347104&partnerID=8YFLogxK

U2 - 10.1021/ma0492364

DO - 10.1021/ma0492364

M3 - Article

AN - SCOPUS:4744347104

VL - 37

SP - 7325

EP - 7330

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 19

ER -