Nanoparticles under heat treatment process
Nanoparticles under heat treatment process
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DOI：
10.1021/jp803583n
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发表时间：
2008-09-11
影响因子：
3.7
通讯作者：
Lee, Jong-Chan
中科院分区：
文献类型：
--
作者：
Cha, Sang-Ho;Kim, Ki-Hyun;Lee, Jong-Chan
利用差示扫描量热法、荧光分光光度计、红外光谱、核磁共振谱、X射线衍射和透射电子显微镜研究了光致发光Au（I）-烷基硫醇盐的结构和热行为。加热后，Au（I）-烷基硫醇盐中烷基的构象从室温下的全反式构象转变为无序构象沿着发光强度降低，随后Au（I）-烷基硫醇盐转变为二正烷基二硫化物、二正烷基硫醚和由烷基硫醇盐稳定的金纳米颗粒的混合物。羧酸和酯功能化的金纳米粒子可以很容易地获得从这个简单的一步加热过程中，使用相应的功能化的Au（I）-硫醇盐没有任何溶剂，表面活性剂，或化学试剂。
The structural and thermal behavior of photoluminescent Au(I)-alkanethiolate was investigated by using differential scanning calorimetry, spectrofluorophotometer, FT-IR spectroscopy, NMR spectroscopy, X-ray diffraction, and transmission electron microscopy. Upon heating the sample, the conformation of the alkyl groups in Au(I)-alkanethiol ate changed from the initial all-trans state at room temperature to the gauche containing disorder state along with the decrease of emission intensity, and then Au(l)-alkanethiolate changed to a mixture of di-n-alkyl disulfide, di-n-alkyl sulfide, and gold nanoparticles stabilized by the n-alkanethiolates. Carboxylic acid and ester functionalized gold nanoparticles can be easily obtained from this simple one-step heating process, using the corresponding functionalized Au(I)-thiolates without any solvent, surfactants, or chemical reagents.