Supporting Information
Functionalization of Polymeric Surfaces by Simple Photoactivation of
C-H bonds
Jing Xu1, Yuhong Ma2,*, Jingyi Xie1, F.J. Xu,1 and Wantai Yang1,2,*
1
Jing Xu, Jingyi Xie and Wantai Yang
State Key Laboratory of Chemical Resource Engineering Beijing University of
Chemical Technology
Box 37, No15 Beisanhuan East Road, Chaoyang District, Beijing, 100029, China
Fax: (+86)10-64446338
E-mail: yangwt@mail.buct.edu.cn (WT)
mayh@mail.buct.edu.cn (YH)
1
Experimental
1. Illustration of the Sandwich Setup
The photo reaction apparatus is presented in Fig. S1 (adapted from Yang et al,
Polymer, 2003, 44:7157-7164).
Fig. S1 Schematic diagram of photoirradiation apparatus (the right is the amplification
of the sandwiched assembly system denoted as 3). 1.Track; 2.Sample holder; 3.
Reaction assembly system; 4.UV lamp (high pressure mercury lamp, 1000W);
5.Ventilation; 6.Top quartz plate; 7.Top layer of polymer film; 8.Bottom layer of
polymer film; 9. Bottom quartz plate; 10. Reactant solution.
2. The reaction of amino groups of the modified film with ninhydin
The film modified with tyramine was immersed into the 2%(wt) aqueous solution of
ninhydrin at 60℃ for 2 hours. Then the film was washed thoroughly with purified
water to remove unreacted ninhydrin. For comparison, the pristine film and the film
exposed to the UV light with the mixture of acetone and water were used as control
samples. The results showed that the control runs has no observable fluorescence
patterns.
3. The deposition of Au nanoparticles on the thiol modified film
2
The colloidal gold solution was prepared by 0.0126g AuCl4 reducted with 0.0018g
trisodium citrate in 10ml water under 100℃ for 24h. The modified films with thiol
groups are immersed into the colloidal solution to deposit Au nanoparticles.
Table S1 Water contact angles (CAs) of various substrates modified with phenol
derivatives of different functionality
Phenol Derivatives
Structure
Pristine
Pure AC
p-aminophenol
Tyramine
4-hydroxylbenzene
sulfonic acid
4-hydroxythiophenol
HO
NH2
HO
CH2CH2NH2
HO
SO3H
HO
SH
NH2
Tyrosine
HO
C
H
BOPP
CA
STD
104. 1.19
9
99.4 2.77
78.1 2.87
LDPE
CA
STD
98.6 2.51
PET
CA
STD
71.0 1.93
96.4
84.5
3.26
2.11
68.4
62.1
5.82
3.52
77.8
5.13
83.1
2.06
63.8
1.33
51.5
6.42
56.6
8.44
38.2
9.47
76.4
3.22
79.2
4.32
58.4
1.54
83.2
5.66
84.5
6.43
69.4
5.87
COOH
3
Contact angle
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
BOPP
LDPE
PET
1%
5%
15%
20%
4-HBSA concentration (v/v)
a
b
Figure S2 Effects of the 4-HBSA concentration (a) and the ratios of acetone (AC) /
H2O (b) on the CA of modified polymer films
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S2p
3/2
5/2
S2P
2p
Au4f
Au4f
Au4f
3/2
1/2
166
165
164
163
162
161
95
Bnding energy(mv)
90
85
80
Binding Energy
Figure S3 EDS mapping of Au deposited on the BOPP modified with –SH groups
and XPS spectrum of core Au(4f)
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