The effect of annealing temperature on the optical properties of a ruthenium complex thin film

Abstract

The stability of the optical parameters of a ruthenium polypyridyl complex (Ru-PC K314) film under varying annealing temperatures between 278 K and 673 K was investigated. The ruthenium polypyridyl complex thin film was prepared on a quartz substrate by drop casting technique. The transmission of the film was recorded by using Ultraviolet/Visible/Near Infrared spectrophotometer and the optical band gap energy of the as-deposited film was determined around 2.20 eV. The optical parameters such as refractive index, extinction coefficient, and dielectric constant of the film were determined and the annealing effect on these parameters was investigated. The results show that Ru PC K314 film is quite stable up to 595 K, and the rate of the optical band gap energy change was found to be 5.23 × 10 −5 eV/K. Furthermore, the thermal analysis studies were carried out in the range 298-673 K. The Differential Thermal Analysis/Thermal Gravimmetry/Differantial Thermal Gravimmetry curves show that the decomposition is incomplete in the temperature range 298-673 K. Ru-PC K314 is thermally stable up to 387 K. The decomposition starts at 387 K with elimination of functional groups such as CO 2 , CO molecules and SO 3 H group was eliminated between 614 K and 666 K.

Investigating the Immunostimulatory and Immunomodulatory Effects of cis and trans Isomers of Ruthenium Polypyridyl Complexes on the Mammalian Macrophage‐Like Cells

“…These materials can absorb solar energy to convert it into electrical energy and let the electron flow for more efficient production of electricity. [1][2][3] Due to their electron carrying capacity, the biocompatible and water-soluble photosensitizers can also find applications in biotechnology. These materials can interfere the electron transport processes of a biological cell and alter its function according to our needs in a disease setting.…”

“…Their mechanism of action is based on the creationand efficient transfer of mobile electrons. [1][2][3] Since, cellular activities rely heavily on the electron mobility; these materials used in the solar cells could also interfere with the electron transport system of the immune cells and alter their activities. [4] In this way, eventually, regulate the function of the immune cells.…”

Anti-inflammatory properties of the Ruthenium polypyridil complex, K314, on the in vitro activated macrophages

“…In this study the immunostimulatory and immunomodulatory activities of a ruthenium polypyridyl complex, K314, were tested on the in vitro activated macrophages. K314 was selected due to its possible interference to the electron transport processes in the biological cells since it can efficiently function as a photosensitizer in the solar cells by regulating the electron mobility after detection of the photons [1][2][3]. We aimed that by altering the electron transportation efficiency within the cells we could change its function and modulate the immune system cells.…”

“…Photosensitizers of the solar cells are able to convert the photons into electrical energy by generating electrons that can get transferred between the chemicals of the solar cells. There have been studies showing the efficiency of the ruthenium based complexes as photosensitizers [1][2][3]. Due to their electron transfer capacities, we hypothesized that these molecules could also find applications in biotechnology.…”

“…Throµgh this modulation, we could manipulate our immune response to fight more efficiently against the danger or to tame it in case of the inflammatory disorders and autoimmune diseases. K314 was the ruthenium polypyridyl based complex derivative that focused on in our study [1][2][3].…”