Rhodium(III) complexes derived from complexation of metal with azomethine linkage of chitosan biopolymer Schiff base ligand: Spectral, thermal, morphological and electrochemical studies.

Rhodium(III) complexes such as [Rh(Chi4Hy3mb)(H2O)2]Cl2, [Rh(Chi2Hymb)(H2O)2]Cl2, and [Rh(Chi2Hy3mb)(H2O)2]Cl2 were synthesized by metal chelation/complexation with chitosan Schiff base ligands. Stable Schiff base ligands were prepared by chemical modification of chitosan with aromatic aldehydes such as vanillin, salicylaldehyde and orthovanillin. These chitosan based Schiff base ligands were performed as bidentate ligands through azomethine nitrogen atom and methoxy/hydroxy oxygen atom. These bidentate ligands were favoured to the formation of stable coordination complex with metal ions. The series of Rhodium(III) complexes were characterized by Elemental analysis, FT-IR, UV-Vis spectroscopy, P-XRD and Thermo-gravimetric analysis (TGA). The electrochemical property of Rhodium(III) complexes were analyzed by cyclic voltametry.

HR-TEM and FT-Raman dataset of the caffeine interacted Phe-Phe peptide nanotube for possible sensing applications.

Sensing ability of caffeine interaction with Phe-Phe annotates (PNTs), is presented (Govindhan et al., 2017; Karthikeyan et al., 2014; Tavagnacco et al., 2013; Kennedy et al., 2011; Wang et al., 2017) [1-5] in this data set. Investigation of synthesized caffeine carrying peptide nanotubes are carried out by FT-Raman spectral analysis and high resolution transmission electron microscopy (HR-TEM). Particle size of the caffeine loaded PNTs is < 40 nm. The FT-Raman spectrum signals are enhanced in the region of 400-1700 cm-1. These data are ideal tool for the applications like biosensing and drug delivery research (DDS).

Synthesis, characterization and antibacterial studies of ruthenium(III) complexes derived from chitosan schiff base.

Chitosan can be modified chemically by condensation reaction of deacetylated chitosan with aldehyde in homogeneous phase. This condensation is carried by primary amine (NH2) with aldehyde (CHO) to form corresponding schiff base. The chitosan biopolymer schiff base derivatives are synthesized with substituted aldehydes namely 4-hydroxy-3-methoxy benzaldehyde, 2-hydroxy benzaldehyde, and 2-hydroxy-3-methoxy benzaldehyde, becomes a complexing agent or ligand. The Ruthenium(III) complexes were obtained by complexation of Ruthenium with schiff base ligands and this product exhibits as an excellent solubility and more biocompatibility. The novel series of schiff base Ruthenium(III) complexes are characterized by Elemental analysis, FT-IR spectroscopy, and Thermo-gravimetric analysis (TGA). The synthesized complexes have been subjected to antibacterial study. The antibacterial results indicated that the antibacterial activity of the complexes were more effective against Gram positive and Gram negative pathogenic bacteria. These findings are giving suitable support for developing new antibacterial agent and expand our scope for applications.