Silver Nanoparticles-Accelerated Photopolymerization of a Diacetylene Derivative

Silver Nanoparticles-Accelerated Photopolymerization of a Diacetylene Derivative
复制标题

银纳米颗粒加速丁二炔衍生物的光聚合

DOI:
10.1021/jp2039288
复制
发表时间:
2011
期刊:
The Journal of Physical Chemistry C
影响因子:
--
通讯作者:
中科院分区:
--
文献类型:
--
作者:
T.Yokoyama;他

文献摘要

参考文献

相似文献

我们研究了银纳米粒子(AgNPs)促进的二乙炔衍生物1,6-二(N-咔唑基)-2,4-己二炔(DCHD)的光聚合,DCHD在光聚合过程中经历了从单体到聚合物的晶体结构的相变。我们已经成功地制备了纳米复合材料的AgNPs和DCHD单体纳米晶体的改进的再沉淀法,我们监测其光聚合过程与拉曼光谱在532 nm激发。虽然在水性分散体中的AgNPs的局域表面等离子体共振(LSPR)波长位于400 nm左右,本纳米复合材料中的AgNPs的波长被转移到更长的波长区域。由于LSPR的红移和加宽,纳米复合材料在532 nm处的消光变得显著,因此,AgNP表面上的表面等离子体增强的光电场可以在532 nm激发时产生。与裸DCHD单体纳米晶体的拉曼光谱相比,纳米复合材料表现出强烈增强的拉曼强度和20-40倍的光聚合速度。因为在本实验中使用的激发功率被认为是不够的热过程中,双或多光子聚合被认为是占主导地位的。我们还观察到一个独特的权力的聚合速率从相变行为。
We have investigated silver nanoparticles (AgNPs)-accelerated photopolymerization of a diacetylene derivative, 1,6-di(N-carbazolyl)-2,4-hexadiyne (DCHD), which undergoes a phase transformation of the crystal structure from monomer to polymer during the photopolymerization. We have successfully fabricated nanocomposites of AgNPs and DCHD monomer nanocrystals by means of the modified reprecipitation method, and we monitored its photopolymerization process with Raman spectroscopy upon 532 nm excitation. Although the localized surface plasmon resonance (LSPR) wavelength of AgNPs in an aqueous dispersion was located around 400 nm, that of AgNPs in the present nanocomposites was shifted to longer wavelength region. The extinction of the nanocomposites at 532 nm became significant because of the red-shift and broadening of the LSPR, and, thus, surface plasmon-enhanced photoelectric fields on the AgNP surfaces could generate upon 532 nm excitation. As compared to the Raman spectra of bare DCHD monomer nanocrystals, the nanocomposites exhibited strongly enhanced Raman intensities and 20–40 times faster photopolymerization. Because the excitation power used in the present experiments is considered to be insufficient for the thermal process, two- or multiphoton polymerization was assumed to be dominant. We have also observed a unique power dependence of the polymerization rate derived from the phase transformation behavior.
聚(1,6-双[N-咔唑基]-2,4-己二炔)拉曼光谱中的振动模式相互作用
DOI: 10.1021/ma9902652
发表时间: 1999
期刊: Macromolecules
影响因子: 5.5
作者:
D. Bloor;T. Fehn
通讯作者: T. Fehn
银/聚二乙炔(核/壳)杂化纳米晶体制造工艺的开发
DOI: --
发表时间: 2009
期刊: Synthetic Metals 159
影响因子: --
作者:
Takahiro Yokoyama;Akito Masuhara;Tsunenobu Onodera;Hitoshi Kasai;Hidetoshi Oikawa
通讯作者: Hidetoshi Oikawa
聚二乙炔的双光子聚合。
DOI: 10.1021/jp806546u
发表时间: 2009
期刊: The journal of physical chemistry. B
影响因子: --
作者:
Olga Shusterman;A. Berman;Y. Golan;B. Horovitz;L. Zeiri
通讯作者: L. Zeiri
Ag 表面二乙炔单羧酸衍生物自组装层的共振拉曼过程和通过 632.8 nm 照射的光诱导相变
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
S. Joo;J. Lim;Keunchang Cho
通讯作者: Keunchang Cho
增强银表面的光化学作用
DOI: 10.1063/1.453508
发表时间: 1987
影响因子: 4.4
作者:
R. Wolkow;M. Moskovits
通讯作者: M. Moskovits