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that of GNRs, which proved the existence of covalent S-Au inclusion compound performing as a wDaOteI:r1-0s.o10lu3b9/leC7ClinCk0e16r78inF
bond on the surface of GNRs. As depicted in Fig. 3a, the Raman arranging GNRs alignment. Moreover, when the GNRs
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band of GNRs at 174 cm was attributed to the Br-Au bond. alignment was irradiated by 365 nm UV light under ultrasonic,
And it was expected to find that the characteristic peaks at 116 it would disassemble and form back to random style like CTAB-
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cm and 262 cm attributed to Au-S-C bond and S-Au bond coated GNRs in water because trans-azobenzene underwent a
respectively were shown on the curve of GNR-BiAzo@CD. The conformational switching to cis-azobenzene and thus, the
changes of Raman spectra effectively proved the successful water-soluble linker plucked from cavity of CD. This work
modification of GNRs with BiAzo@CD.
successfully developed a method to obtain hybrid GNR
nanomaterials and effectively control their
assembling/dissembling via both light stimuli and guest
competition.
We acknowledge the financial support from Programme of
Introducing Talents of Discipline to Universities (B16017),
NSFC/China (21421004, 21476075 and 21272072) and the
Fundamental Research Funds for the Central Universities.
Notes and references
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(a) Y. Yao, Y. Wang, F. Huang, Chem. Sci., 2014,
Li, L.-L. Tan, P. Jia, Q.-L. Li, Y.-L. Sun, J. Zhang, Y.-Q. Ning, J. Yu,
Y.-W. Yang, Chem. Sci. 2014, , 2804; (c) M. Grzelczak, J.
5, 4312; (b) H.
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Perez-Juste, P. Mulvaney and L. M. Liz-Marzan, Chem. Soc.
Rev., 2008, 37, 1783; (d) X. Ye, L. Jin, H. Caglayan, J. Chen, G.
Xing, C. Zheng, V. Doan-Nguyen, Y. Kang, N. Engheta, C. R.
Kagan and C. B. Murray, ACS Nano, 2012,
Lohse, J. R. Eller, S. T. Sivapalan, M. R. Plews and C. J. Murphy,
ACS Nano, 2013, , 4135.
6, 2804; (d) S. E.
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(a) P. K. Jain, X. Huang, I. H. El-Sayed and M. A. El-Sayed, Acc.
Chem. Res., 2008, 41, 1578; (b) G. Jiang, M. J. A. Hore, S.
Gam and R. J. Composto, ACS Nano, 2012,
Y. Xue, L. Dai, A. Urbas, Q. Li, Eur. J. Inorg. Chem. 2013, 2682;
d) J. Cao, S. Wu, B. Zhai, Q. Wang, J. Li, X. Ma, Dyes
6, 1578; (c) X. Ma,
(
Pigments¸ 2014, 103, 89; (e) T. Cao, D. Li, X. Yao, Y. Xu, X. Ma,
Dyes Pigments¸ 2016, 124, 1.
3
4
(a) K. Liu, Z. Nie, N. Zhao, W. Li, M. Rubinstein and E.
Kumacheva, Science, 2010, 329, 197; (b) T.-T. Song, W. Wang,
L.-L. Meng, Y. Liu, X.-B. Jia, X. Mao, Chin. Chem. Lett., 2017,
28, 226.
Fig. 3 (a) Normalized Raman spectra of CTAB-GNR (black) and GNR-BiAzo@CD
C. J. Murphy, L. B. Thompson, A. M. Alkilany, P. N. Sisco, S. P.
Boulos, S. T. Sivapalan, J. A. Yang, D. J. Chernak and J. Huang,
(
red). (b) FT-IR spectra of BiAzo@CD (black) and GNR-BiAzo@CD (red).
J. Phys. Chem. Lett., 2010, 1, 2867.
The FT-IR spectra (Fig. 3b) of BiAzo@CD and GNR-BiAzo@CD
were also studied to reaffirm that GNRs was successfully
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F. C. Leung, S. Y. Leung, C. Y. Chung and V. W. Yam, J. Am.
Chem. Soc., 2016, 138, 2989.
Y. Zhu, H. Kuang, L. Xu, W. Ma, C. Peng, Y. Hua, L. Wang and
C. Xu, J. Mater. Chem., 2012, 22, 2387.
S. T. Jones, J. M. Zayed and O. A. Scherman, Nanoscale, 2013,
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modified with BiAzo@CD. The similar FT-IR signals at 2850 cm
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and 2930 cm attributed to CH stretching vibration were
observed in both spectra. The four signals at 1680 cm , 1580
cm , 1500 cm and 1450 cm were the characteristic peaks of
skeleton deformation vibration of benzene ring. The band of
symmetrical and asymmetrical stretching vibration of C-O-C
was found at 1090 cm and 1150 cm , respectively. The signal
at 760 cm manifested the out-of-plane bending vibration of
C-H in benzene ring. And the characteristic signals of the
2
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5
, 5299.
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1
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X. Ma, A. Urbas and Q. Li, Langmuir, 2012, 28, 16263.
A. F. Stewart, B. P. Gagnon and G. C. Walker, Langmuir, 2015,
31, 6902.
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10 (a) Z. Nie, D. Fava, M. Rubinstein and E. Kumacheva, J. Am.
Chem. Soc., 2008, 130, 3683; (b) A. Lukach, K. Liu, H. Therien-
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Aubin and E. Kumacheva, J. Am. Chem. Soc., 2012, 134
8853.
,
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stretching vibration of C-S were shown at 1250 cm . Thus, 11 S. Pan, L. He, J. Peng, F. Qiu and Z. Lin, Angew. Chem., Int. Ed.,
2
016, 128, 8828.
2 L. Vigderman, B. P. Khanal and E. R. Zubarev, Adv. Mater.,
012, 24, 4811.
3 X. Xu, C. Xu and Y. Ying, RSC Adv., 2016,
their FT-IR spectra also help to prove the successful
attachment of BiAzo@CD onto GNRs.
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In summary, we have constructed an end-to-end alignment
of GNRs through a binary supramolecular system based on
host-guest interaction and could use UV light to realize the
transformation from assembly to disassembly of GNRs. The
guest that possesses trans-azobenzene on both ends can be
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6, 50437.
4 W. He, C. Z. Huang, Y. F. Li, J. P. Xie, R. G. Yang, P. F. Zhou and
J. Wang, Anal. Chem., 2008, 80, 8424.
5 C. Wang, J. Chen, T. Talavage and J. Irudayaraj, Angew. Chem.
Int. Ed., 2009, 121, 2797.
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