PMID- 30821307
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1744-6848 (Electronic)
IS  - 1744-683X (Linking)
VI  - 15
IP  - 17
DP  - 2019 Apr 24
TI  - Non-dependence of dodecamer structures on alkyl chain length in Platonic 
      micelles.
PG  - 3515-3519
LID - 10.1039/c9sm00076c [doi]
AB  - When the micellar aggregation number (Nagg) is sufficiently small (Nagg < 30), 
      the micelle shows an abnormal aggregation behavior: monodispersity without any 
      distribution in Nagg, whose values coincide with the vertex number of a regular 
      polyhedral structure, i.e., they are termed Platonic solids. Micelles with these 
      characteristics are named "Platonic micelles". In this study, we investigated the 
      aggregation behavior of calixarene-based micelles bearing primary amines-the 
      first example of Platonic micelles-with increasing alkyl chain length by 
      small-angle X-ray scattering, asymmetrical flow field flow fractionation coupled 
      with multiangle light scattering, and analytical ultracentrifugation 
      measurements. Morphological transition of the micelles from spherical to 
      cylindrical was observed when the alkyl chain length was increased in this 
      calixarene-based micellar system, which is similar to the case of conventional 
      systems and is acceptable in terms of the packing parameter principle. However, 
      although the micellar Nagg normally increases with an increase in the alkyl chain 
      length, the structure of calixarene-based Platonic micelles bearing butyl (C4), 
      heptyl (C5), and hexyl (C6) chains remains at 12-mer. This is presumably due to 
      the relationship between the thermodynamic stability of the Platonic micelles and 
      the coverage ratio defined by the Tammes problem.
FAU - Araki, Masataka
AU  - Araki M
AD  - Department of Chemistry and Biochemistry, University of Kitakyushu, 1-1 Hibikino, 
      Kitakyushu, Fukuoka 808-0135, Japan. sakurai@kitakyu-u.ac.jp.
FAU - Fujii, Shota
AU  - Fujii S
FAU - Lee, Ji Ha
AU  - Lee JH
FAU - Takahashi, Rintaro
AU  - Takahashi R
FAU - Sakurai, Kazuo
AU  - Sakurai K
LA  - eng
PT  - Journal Article
PL  - England
TA  - Soft Matter
JT  - Soft matter
JID - 101295070
EDAT- 2019/03/02 06:00
MHDA- 2019/03/02 06:01
CRDT- 2019/03/02 06:00
PHST- 2019/03/02 06:00 [pubmed]
PHST- 2019/03/02 06:01 [medline]
PHST- 2019/03/02 06:00 [entrez]
AID - 10.1039/c9sm00076c [doi]
PST - ppublish
SO  - Soft Matter. 2019 Apr 24;15(17):3515-3519. doi: 10.1039/c9sm00076c.