Supporting Information
Bulk and Surface Assembly of Branched Amphiphilic Polyhedral Oligomer Silsesquioxane Compounds
Ray Gunawidjaja, 1 Feifei Huang, 1 Maryana Gumenna, 2 Nina Klimenko, 2 Grady A. Nunnery, 1 Valery Shevchenko, 2 Rina Tannenbaum,1 Vladimir V. Tsukruk 1 1
Georgia Institute of Technology, School of Materials Science and Engineering, Atlanta, GA 30332-0245 2
Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine, Khar’kovskoe sh. 48, Kiev, 02160 Ukraine
Molecular weight determination of the common core-molecule, (POSS-M)1-(0/100), by means of GPC yields a number average molecular weight of 4,040 g/mol with PDI of 1.1
(Table
S1
and
Figure
S1a).
The
molecular
weight
corresponds
to
[(HOCH2CH(OH)CH2)2N(CH2)3SiO1.5)]16 having a T16 core, i.e., (SiO1.5)16. This is in agreement with that reported previously in the literatures. 1 Nonetheless, it should be noted that GPC measurement of (POSS-M)1-(0/100) does depend on –OH group and column interaction, as determined by choice of solvent. 2 Figure S1b shows the 1H-NMR spectrum of (POSS-M)1-(0/100) molecule. Compound was dissolved in (CD3)2SO: 0.30.8 (-Si-CH2-), 1.3-1.7 (-Si-CH2-CH2- in the β-position to the Si atom), 2.2-3.0 (-N-CH2 in the α-position to the N atom), 3.3-4.0 (CH2 and CH in the α-position to the O atom), and 4.2-4.8 (OH). Error! Bookmark not defined.
Table S1. Molecular weight and PDI information of (POSS-M)1-(x/y) sample measured by GPC using DMF eluent. Мn , Mw, PDI Peak N Peak Area, % g / mol g / mol Mw/ Мn 1
43
11,667
12,667
1.1
55
2
14
3,696
4,374
1.2
45
Мav
16
4,040
4,467
1.1
100
1
0
5
10
15
20
25
2
30
35
40
min
Figure S 1. (a) GPC chromatogram of (POSS-M)1-(0/100). (b) 1H-NMR of (POSS-M)1(0/100).
b)
a)
8
6
4
2
Chemical Shift, ppm
0
8
6
4
2
Chemical Shift, ppm
Figure S 2. 1HNMR spectra of: (a) (POSS-M)1-(x/y) and (b) (POSS-M)2-(x/y).
0
Reference 1
Mori, H.; Landzendörfer, M. G.; Müller, A. H. E. Macromolecules 2004, 37, 5228. Klimenko, N. S.; Gumenna, M. A.; Shevchuk, A. V.; Bojchuk, V. V.; Snegir, S. V.; Pokrovsky, V. A.; Shevchenko. V. Reports NAS of Ukraine. 2007, 12, 132. 2
