(Acetyl­acetonato)(dicyanamido)(1,10-phenanthroline)copper(II) dihydrate

In the title compound, [Cu(C5H7O2)(C2N3)(C12H8N2)]·2H2O, the CuII atom is five-coordinated in a square-pyramidal geometry with two acetyl­acetonate O and two phenanthroline N atoms forming the base. The apical position is occupied by the central N atom of the dicyanamide ligand. The dicyanamide N atoms are each involved in hydrogen bonds to water mol­ecules. There are also hydrogen bonds between both the water mol­ecules and their centrosymmetric pairs, creating a hydrogen-bonded chain along the b-axis direction

A Spectroscopic and Nondestructive Analysis Methods for Investigation of Inorganic Pigments in A Cultural Heritage in North of Iran

Many of the historical objects that form our cultural heritage are made of wood. Wooden artefacts, wood painted panels and historic furniture represent a significant part of our cultural heritage. Their preservation over time is a challenging task, and insect infestation still represents a primary cause of loss of cultural heritage artifacts. For this reason in this research, wood pigments that are important in the conservation of historical wooden objects are described. The characterization of very stable pigments from a cultural heritage building named by SAGHATALAR which is located in Mazandaran province, a suburb around of Fridonkenar city in the north of Iran near Caspian Sea (Cochakbishehmahaleh village) was investigated. The result were showed no organic materials was find in the four colors (Blue, Red, Yellow and Green) as samples of this building were detected and taken samples from them for characterization and analysis. The spectroscopic techniques that have been used are Fourier transform infrared spectroscopy (FT-IR), X‐ray fluorescence spectroscopy (XRF), X‐ray emission spectroscopy (XRD), Uv-vis spectroscopy, fluorescence spectroscopy, Raman spectroscopy and Mossbauer spectroscopy

Novel coupling reactions of phytochemicals with sulfa drugs and their applications in the determination of nitrite at trace level in environmental samples

Twelve spectrophotometric methods based on new reactions for the determination of trace amounts of nitrite in environmental samples were developed. Replacement of toxic reagents was explored to attain the standards of clean chemistry. These methods utilize two classes of compounds namely; phytochemicals and sulfonamides, in the presence of limited amounts of sodium hydroxide. The methods were based on the oxidation of sulfanilamide (SAA), sulfadoxine (SDX), sulfamethoxazole (SMX) or sulfadiazine (SDZ) by nitrite in sodium hydroxide medium and coupling with cardol, cardanol or anacardic acid which yielded yellow, orange and orange red color derivatives having an absorbance maximum in the range 430, 460 and 470nm, respectively. The colors developed were stable for about 3h. Beer’s law was obeyed for nitrite in the concentration range 0.08–0.90, 0.16–1.04, 0.08–0.80 and 0.08–0.80μgml−1 for cardol; 0.80–4.40, 1.60–5.72, 0.52–5.20 and 0.80–4.40μgml−1 for cardanol and 0.80–5.70, 1.04–6.20, 1.30–5.20 and 0.80–4.00μgml−1 for anacardic acid, respectively. The reaction conditions and other important analytical parameters were optimized to enhance the sensitivity of the methods. Interference if any, by non-target ions was also investigated. The methods were applied determining nitrite in environmental samples. The performances of these methods were evaluated in terms of Student’s t-test and variance ratio F-test to find out the significance of the proposed methods over the reference spectrophotometric method