A facile synthesis of silver nanoparticles using Woodfordia fruticosa flower extracts for certain bacteria inhibition applications.

The present research focused on extraction of bioactive compounds from Woodfordia fruticosa flower (WF) using ethanol, methanol and ethyl acetate as solvents and the development of silver nanoparticles using these extracts for inhibition of (), (), (), and Bacillus cereus (B. cereus) bacteria. The functional groups of bioactive compounds present in the solvent extracts were characterized using Fourier transform infrared spectroscopy (FT-IR).

Photoinduced Electron Transfer Reactions of Water Soluble Porphyrins in Zeolite Environment.

Excited state interactions of zeolite adsorbed porphyrins have been investigated by steady state luminescence quenching technique with certain antioxidants such as reduced glutathione, ascorbic acid and L-cysteine. The zeolite supported porphyrins, meso-tetra (N-methyl-4-pyridyl) porphyrin (HTMPyP) and zinc tetra(N-methyl-4-pyridyl) porphyrin (ZnTMPyP) were prepared and characterized by various techniques such as Diffuse Reflectance Spectra (DRS), Scanning Electron Microscope (SEM), powder X-Ray Diffraction (XRD) and BET surface area. The interaction of zeolites with porphyrins are shown to increase the lifetime of the singlet excited state of porphyrins and decays are biphasic in nature.

Pyrene based D-π-A architectures: synthesis, density functional theory, photophysics and electron transfer dynamics.

Pyrene derivatives show immense potential as sensitizers for dye-sensitized solar cells (DSCs). Therefore, this work focuses on the impact of π-spacers on the photophysical, electrochemical and photovoltaic properties of pyrene based D-π-A dyes, since the insertion of π-spacers is one of the doable strategies to improve the light harvesting properties of the dye. In this respect, three new pyrene based D-π-A dyes have been synthesized and characterized by H, C NMR, and elemental analyses and EI-MS spectrometry.