Photonics of DNA/ruthenium(II) complexes

Nanophotonics

article

Norihisa Kobayashi¹  Haruki Minami³  Kazuki Nakamura¹ 

[1] Graduate School of Engineering, Chiba University;Molecular Chirality Research Center, Chiba University;Graduate School of Advanced Integration Science, Chiba University

关键词: Ru(II) complex;    DNA;    electrochemiluminescence;    electrochemistry;    hybrid materials;    luminescence property;   

DOI  :  10.1515/nanoph-2018-0029

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In this review, we describe the investigation of a ruthenium [Ru(II)] complex-based, AC voltage-driven, electrochemiluminescent (ECL) device first. The ECL turn-on response time and intensity were dramatically improved by introducing the AC method. The turn-on response time was speeded up by increasing the applied frequency: 4 ms response time was achieved at 200 Hz, which was much faster than when using the DC method (1.5 s). We also introduced rutile-type titanium dioxide nanoparticles (TiO 2 NPs) in a Ru(II) complex-based AC-ECL device. The ECL intensity and the lifetimes of the ECL device with TiO 2 NPs were greatly improved compared to those of the device without nanoparticles. Then we tried to improve photoelectrochemical properties of the Ru(II) complex by combining it with DNA molecules. We fabricated a novel DNA/Ru(bpy) 3 2+ hybrid film that could immobilize the ECL-active Ru(bpy) 3 2+ onto the electrode surface through electrophoretic migration. The hybrid film contained unique micrometer-scale aggregates of Ru(bpy) 3 2+ in the DNA matrix. Surprisingly, by using the DNA/Ru(bpy) 3 2+ hybrid film for the ECL device, luminescence could be obtained at frequencies as high as 10kHz, which corresponds to a response time shorter than 100μs.

【 授权许可】

CC BY