Interfacial self-assembly, characterization, electrochemical, and photo-catalytic properties of porphyrin-ruthenium complex/polyoxomelate triad hybrid multilayers

Abstract

Triad hybrid multilayers composed of tetrapyridylporphyrin (TPyP), bis(2,2'-bipyridyl)ruthenium chloride [Ru(bpy)2Cl2], and phosphomolybdic acid (PMA) have been prepared at the gas-liquid interface. The tetraruthenated porphyrin of TPyP-Rubpy complex was synthesized by the coordination interaction of TPyP with Ru(bpy)2Cl2. Surface pressure-area isotherms indicated that the average molecular area of the TPyP-Rubpy complex was in the range of 3.13.3 nm 2 when the PMA concentration was 0.10.3 mg/mL in the subphases. Monolayers of the TPyP-Rubpy/PMA triad hybrids were transferred onto the substrate surfaces by using the Langmuir-Blodgett (LB) method. The absorption spectra of the hybrid LB films revealed several strong peaks between 300 and 440 nm, attributed to the * electron transfer of the Rubpy substituent and the Soret band of TPyP. Under radiation, the TPyP-Rubpy complex gave off strong luminescence in the wavelength between 600 and 700 nm, attributed to the emissions from the Rubpy and TPyP substituents. These emissions largely weakened in the LB films of TPyP-Rubpy/PMA triad hybrids. Cyclic voltammograms showed six couples of redox waves in the potential range from 1.2 to 0.6 V (vs Hg/HgCl2), which could be designated for the electron transfer processes of TPyP, Rubpy and PMA, respectively. Finally, it was revealed that the present triad hybrid LB films can be used as efficient light-harvesting units for the photo-catalytic oxidation of organic dyes and for light-induced photocurrent generation.

Self-Assembled Composite Langmuir Films via Fluorine-Containing Bola-Type Derivative with Metal Ions

“…Various composite films fabricated via interfacial self-assembly have been designed and prepared to construct organized arrays for use in potential applications, such as catalytic materials, sensors, etc. [54][55][56][57][58][59][60][61][62][63]. The present research provides a platform for new explorations into the construction of self-assembled composite films via interfacial coordination using LB techniques.…”

Sintesis, Pencirian Spektroskopi dan Sifat Fotomangkin Rutenium(II) Bis(bipiridil)- 2-(1H-pirazol-3-il)piridi

“…Kebelakangan ini, penggunaan fotomangkin kompleks berasaskan kompleks logam berdasarkan logam Ru(II) yang peka kepada cahaya nampak menjadi pilihan untuk meningkatkan jumlah elektron teruja untuk aktiviti fotopemangkinan (Boyer et al 2016;Fung et al 2003;He et al 2016;Mahon et al 2017;Tan et al 2014). Kompleks Ru(II) mempunyai ciri elektrokimia yang baik contohnya memiliki sifat redoks berbalik dan stabil (Eskelinen et al 2000;Rozenel et al 2017).…”

Evolution of Nanoflowers and Nanospheres of Zinc Bisporphyrinate Tweezers at the Air/Water Interface

“…Generally, derivatives with long alkyl chain modifications on the porphyrin rings are best investigated in Langmuir and LB films. − Further investigations revealed that those with more complicated substituents other than alkyl chain are also efficient in forming the spreading films. Moreover, porphyrins with simple or even without any substituents can form films, which largely expand the research scope on porphyrin assemblies in the two-dimensional air/water interface. − In this paper, the self-assembly of a tweezer-type bisporphyrins at the air/water interface is investigated, and some new insights into the bottom–up nanofabrication on the nanostructures of porphyrins are revealed.…”