Unveiling thermal transitions of polymers in subnanometre pores.
Unveiling thermal transitions of polymers in subnanometre pores.
复制标题
DOI：
10.1038/ncomms1091
复制
发表时间：
2010-10-05
影响因子：
16.6
通讯作者：
Kitagawa, Susumu
中科院分区：
文献类型：
--
作者：
Uemura, Takashi;Yanai, Nobuhiro;Watanabe, Satoshi;Tanaka, Hideki;Numaguchi, Ryohei;Miyahara, Minoru T.;Ohta, Yusuke;Nagaoka, Masataka;Kitagawa, Susumu
受限聚合物的热转变对于聚合物在分子尺度器件和先进纳米技术中的应用具有重要意义。然而，人们对限制在亚纳米空间中的超薄聚合物组装体的热转变知之甚少。在这项研究中，我们表明，将聚乙二醇（PEG）的多孔配位聚合物（PCPs）的纳米通道，使观察的热转变的链组件的差示扫描量热法。可以定制PCP的孔径和表面官能度，以研究受限聚合物的转变行为。PEG在PCPs中的转变温度是通过操纵孔径和孔-聚合物相互作用来确定的。同样引人注目的是，受限PEG的转变温度随着PEG分子量的增加而降低。了解受限聚合物的热转变对于分子尺度器件的设计具有重要意义。在这项研究中，观察到不寻常的热转变聚乙二醇链纳入纳米通道的多孔配位聚合物。
The thermal transitions of confined polymers are important for the application of polymers in molecular scale devices and advanced nanotechnology. However, thermal transitions of ultrathin polymer assemblies confined in subnanometre spaces are poorly understood. In this study, we show that incorporation of polyethylene glycol (PEG) into nanochannels of porous coordination polymers (PCPs) enabled observation of thermal transitions of the chain assemblies by differential scanning calorimetry. The pore size and surface functionality of PCPs can be tailored to study the transition behaviour of confined polymers. The transition temperature of PEG in PCPs was determined by manipulating the pore size and the pore–polymer interactions. It is also striking that the transition temperature of the confined PEG decreased as the molecular weight of PEG increased. Understanding the thermal transitions of confined polymers is important for the design of molecular scale devices. In this study, unusual thermal transitions are observed in polyethylene glycol chains incorporated in nanochannels of porous coordination polymers.
登录
查看更多内容
影响因子：
2.4
作者：
Dalnoki-Veress, K;Forrest, JA;Dutcher, JR
通讯作者：
Dutcher, JR
影响因子：
4.6
作者：
OZAWA, T
通讯作者：
OZAWA, T
影响因子：
16.6
作者：
Horike, Satoshi;Matsuda, Ryotaro;Kitagawa, Susumu
通讯作者：
Kitagawa, Susumu
影响因子：
41.2
作者：
Rittigstein, Perla;Priestley, Rodney D.;Torkelson, John M.
通讯作者：
Torkelson, John M.
影响因子：
56.9
作者：
Lafferentz, Leif;Ample, Francisco;Grill, Leonhard
通讯作者：
Grill, Leonhard