Pal Nabin Kumar, Kryschi Carola
Department of Chemistry and Pharmacy and ICMM, Friedrich-Alexander-University of Erlangen-Nuremberg, Erlangen, Germany.
Phys Chem Chem Phys. 2015 Sep 7;17(33):21423-31. doi: 10.1039/c5cp01773d.
Here in this contribution, blue and red luminescent 1-dodecanethiol (DT) terminated gold nanoclusters (AuNC) were prepared by a simple two-step synthesis route where the first step involved the surfactant-free synthesis of bare AuNC in N,N'-dimethylformamide (DMF) and the second step is the termination of the as-prepared bare AuNC by 1-dodecanethiol. The blue and red luminescent DT-terminated AuNC were isolated by a solvent-induced precipitation followed by an ultra-centrifugation technique. Both the bare AuNC and the blue and red luminescent DT-terminated AuNC exhibit stable photoluminescence and good solubility in various solvents. The photo-physical, electronic, structural, and morphological properties of the bare AuNC and the blue and red luminescent DT-terminated AuNC were examined by performing UV-Vis absorption spectroscopy, stationary and time-resolved PL spectroscopy, X-ray photoelectron spectroscopy (XPS), femtosecond transient absorption spectroscopy, Fourier-transform infrared spectroscopy (FTIR-ATR), and high-resolution transmission electron microscopy (HRTEM) experiments.
在本论文中，通过一种简单的两步合成路线制备了蓝色和红色发光的1-十二烷硫醇（DT）封端的金纳米团簇（AuNC），第一步是在N，N'-二甲基甲酰胺（DMF）中进行无表面活性剂的裸AuNC合成，第二步是用1-十二烷硫醇封端所制备的裸AuNC。通过溶剂诱导沉淀和超速离心技术分离出蓝色和红色发光的DT封端的AuNC。裸AuNC以及蓝色和红色发光的DT封端的AuNC均表现出稳定的光致发光特性，并且在各种溶剂中具有良好的溶解性。通过进行紫外可见吸收光谱、稳态和时间分辨光致发光光谱、X射线光电子能谱（XPS）、飞秒瞬态吸收光谱、傅里叶变换红外光谱（FTIR-ATR）以及高分辨率透射电子显微镜（HRTEM）实验，研究了裸AuNC以及蓝色和红色发光的DT封端的AuNC的光物理、电子、结构和形态性质。
