Photo‐induced characteristics of azobenzene based gold nanoparticles

Abstract

The azobenzene based gold nanomaterials was synthesised through Au-S bonding between thiol substituted azobenzene derivatives with gold nanomaterials core. The structures of the compounds were elucidated by nuclear magnetic resonance, IR, transmission electron microscopy and UV-Vis spectroscopic techniques. The photoisomerisation effect was investigated for the synthesised compounds using the absorption studies. The photosaturation was occurred at ∼24 s and back relaxation was found at ∼315 min. The sterical hindrance developed by the multiple attachments of azobenzene molecules to the central gold nanoparticle core is the reason for the lengthening of photo-switching time duration. This study gives good information about the light induced characters of azobenzene based gold nanoparticles.

Chemically Bonded Plasmonic Triazole‐Functionalized Au/Zeolitic Imidazole Framework (ZIF‐67) for Enhanced CO2 Photoreduction

“…As seen in Figure S2, Au‐20/ZIF exhibited a different spectrum compared to Au‐40/ZIF. The characteristic peaks at 2.5 and 7.0 ppm corresponds to methyl and CH−(CH 3 ) 2 methine groups of the ZIF‐67 respectively, which are more intense for Au‐40/ZIF [66–68] . This could be related to a reduced amount of capping agent in the sample.…”

“…The characteristic peaks at 2.5 and 7.0 ppm corresponds to methyl and CHÀ (CH 3 ) 2 methine groups of the ZIF-67 respectively, which are more intense for Au-40/ZIF. [66][67][68] This could be related to a reduced amount of capping agent in the sample. A larger nanoparticle size could be covered by fewer SÀ H groups if the Au loading is fixed.…”

Synthesis and Photo-Induced Isomerization Performance for the Novel Bent Diazobenzene Liquid Crystals

“…2015 年 Rahman 等 [8] 再次报道了以邻苯酚为中心核的双 偶氮弯曲形液晶, 其光致异构化速度在 15 s 左右. 2017 年 Aralapura 等 [9] 报道了由硫醇取代的偶氮苯衍生物与 金纳米材料核心通过 Au-S 键键合而成的基于偶氮苯 的金纳米材料, 光致异构至饱和态的时间约 24 s. 2017 年 He 等 [10] 合成了一系列具有支链末端的手性偶氮苯化 合物, 并对其光敏性能进行了研究, 发现光化学性质受 偶氮苯的反-顺式构型及偶氮键与手性中心之间的连接 位置影响较大. 而现有报道 [7～15]…”