当前位置：
X-MOL 学术
›
J. Phys. Chem. C
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Using ATTO Dyes To Probe the Photocatalytic Activity of Au–CdS Nanoparticles
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-12-22 00:00:00 , DOI: 10.1021/acs.jpcc.6b09814 Ujjal Bhattacharjee 1 , Long Men 1 , Bryan A. Rosales 1 , Samuel R. Alvarado 1 , Javier Vela 1 , Jacob W. Petrich 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2016-12-22 00:00:00 , DOI: 10.1021/acs.jpcc.6b09814 Ujjal Bhattacharjee 1 , Long Men 1 , Bryan A. Rosales 1 , Samuel R. Alvarado 1 , Javier Vela 1 , Jacob W. Petrich 1
Affiliation
|
Metal–semiconductor nanohybrids (or heterostructures), such as Au–CdS, have become an important class of materials because of their role in photochemical hydrogen production and in other catalytic reactions. Here we report the results of photophysical studies of the interactions of these particles with ATTO dyes (ATTO 590 and 655), which are used as fluorescent probes in a wide range of spectroscopic techniques, most notably super-resolution microscopies. The most important feature of the Au–CdS particles is that they provide the possibility of selective excitation at either their CdS or their Au domains, which absorb preferentially at wavelengths shorter or longer than 500 nm, respectively, thus making possible an excited-state charge transfer reaction from ATTO. Fluorescence quenching of ATTO is dominated by charge transfer to either the CdS domain (λex = 400 nm) or the Au domain (λex = 570 nm). This quenching is quantified by steady-state and time-resolved absorption and fluorescence measurements, and its assignment is confirmed by electrochemical measurements. The results indicate that the ATTO dyes are sensitive and useful probes for measuring the photocatalytic activity of nanoparticles. Characterizing the nonradiative processes of the ATTO dyes in the presence of these catalytically active particles provides a means of gauging their utility in the wide range of spectroscopies in which they are employed.
中文翻译：
使用ATTO染料探测Au–CdS纳米粒子的光催化活性
金属-半导体纳米杂化物（或异质结构），例如Au-CdS，由于它们在光化学产氢和其他催化反应中的作用，已成为一类重要的材料。在这里，我们报告了这些粒子与ATTO染料（ATTO 590和655）之间相互作用的光物理研究结果，这些染料在各种光谱技术中，尤其是超分辨率显微技术中，被用作荧光探针。Au–CdS颗粒的最重要特征是，它们提供了在其CdS或Au域上选择性激发的可能性，它们分别在短于或长于500 nm的波长处优先吸收，从而使激发态电荷成为可能从ATTO转移反应。ex = 400 nm）或Au域（λex = 570 nm）。该猝灭通过稳态和时间分辨的吸收和荧光测量来定量，并且其归属通过电化学测量来确认。结果表明ATTO染料是用于测量纳米颗粒的光催化活性的灵敏且有用的探针。在这些催化活性颗粒的存在下表征ATTO染料的非辐射过程，提供了一种手段，可在多种使用它们的光谱学方法中评估其实用性。
更新日期：2016-12-22
中文翻译：
使用ATTO染料探测Au–CdS纳米粒子的光催化活性
金属-半导体纳米杂化物（或异质结构），例如Au-CdS，由于它们在光化学产氢和其他催化反应中的作用，已成为一类重要的材料。在这里，我们报告了这些粒子与ATTO染料（ATTO 590和655）之间相互作用的光物理研究结果，这些染料在各种光谱技术中，尤其是超分辨率显微技术中，被用作荧光探针。Au–CdS颗粒的最重要特征是，它们提供了在其CdS或Au域上选择性激发的可能性，它们分别在短于或长于500 nm的波长处优先吸收，从而使激发态电荷成为可能从ATTO转移反应。ex = 400 nm）或Au域（λex = 570 nm）。该猝灭通过稳态和时间分辨的吸收和荧光测量来定量，并且其归属通过电化学测量来确认。结果表明ATTO染料是用于测量纳米颗粒的光催化活性的灵敏且有用的探针。在这些催化活性颗粒的存在下表征ATTO染料的非辐射过程，提供了一种手段，可在多种使用它们的光谱学方法中评估其实用性。
京公网安备 11010802027423号