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Organometallic gold nanoparticles and thin films from cis- and trans-tetrazonium gold(III) salts for electrochemical and photothermal mirror properties
Journal of Organometallic Chemistry ( IF 2.1 ) Pub Date : 2021-01-04 , DOI: 10.1016/j.jorganchem.2021.121681
Seema Panicker , Aristides Marcano , Shehu Isah , Brianna Kenney , Bizuneh Workie , Changseok Han , Haesung Lee , Mohamed M. Chehimi , Ahmed A. Mohamed

Tetrazonium gold(III) salts of syn-(cis) and anti-(trans) geometry of 4,4′-(1,3-phenylenediisopropylidene)bisaniline and 4,4′-(1,4-phenylenediisopropylidene)bisaniline were synthesized. HAuCl4 was used as a metal-based counter anion precursor. The gold-carbon nanoparticles (AuNPs) were constructed using the mild reducing agent organoborane 9-borabicyclo[3.3.1]nonane (9-BBN). The nanoparticles dispersed in acetonitrile showed a plasmon peak at 540 nm. Dynamic light scattering measurements showed the size of cis-AuNPs is smaller than the trans-AuNPs. Transmission electron microscopy images showed the formation of spherical shaped AuNPs. X-ray diffraction, energy dispersive spectroscopy, and X-ray photoelectron spectroscopy results supported the presence of metallic gold in both the cis and trans AuNPs. Electrochemical studies of the tetrazonium salts showed the facile reduction and the blocking effect of the films formed on glassy carbon electrodes. The photothermal mirror method was used to study the thermal diffusivity of gold thin films deposited over a glassy carbon substrate. The values of the thermal diffusivity coefficient were determined for the cis and trans isomers of the film.



中文翻译:

有机金属金纳米粒子和由顺式和反式四唑鎓金(III)盐形成的薄膜的电化学和光热镜性质

合成了4,4'-(1,3-苯二异丙基亚丙基)双苯胺和4,4'-(1,4-苯二异丙基亚丙基)双苯胺的顺-(顺式)几何构型和反-(反式)几何构型的四足金(III)盐。氯化铝4用作金属基抗衡阴离子前体。使用温和的还原剂有机硼烷9-硼环[3.3.1]壬烷(9-BBN)构造金-碳纳米颗粒(AuNPs)。分散在乙腈中的纳米颗粒在540 nm处显示一个等离激元峰。动态光散射测量表明,顺式-AuNPs的大小小于反式-AuNPs。透射电子显微镜图像显示球形AuNPs的形成。X射线衍射,能量色散光谱和X射线光电子能谱结果支持了顺式和反式AuNPs中都存在金属金。四唑鎓盐的电化学研究表明,在玻璃状碳电极上形成的薄膜易于还原并具有阻断作用。使用光热镜方法研究沉积在玻璃碳基底上的金薄膜的热扩散率。确定膜的顺式和反式异构体的热扩散系数值。

更新日期:2021-01-12
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