Abstract
Under room temperature ultrasonic conditions, mixing the neutral 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine (tptz) ligand with Ni(II) salt resulted in the preparation of a unique {[Ni(tptz)Cl(H2O)2]-[Ni(tptz)(H2O)3]}3Cl.5H2O complex with two different nickel(II) centers in a high yield. The crystal structure of {[Ni(tptz)Cl(H2O)2][Ni(tptz)(H2O)3]}3Cl.5H2O revealed the existence of distorted octahedral around both Ni(II) centers. The complex structure was further supported by FT-IR, UV-Vis., CHN-EA, TGA and EDX. The computed HSA was also performed to support the XRD interaction types. The existence of the H2O molecules in the crystal lattice was examined by FT-IR and TG/DTG measurements that proved the presence of coordinated and uncoordinated water molecules. Moreover, the thermal stability of the desired complex was evaluated at open atmosphere via TG/DTG and showed stability up to ~400 °C and multistep thermal decomposition.
Highlights
In recent years, there has been a rising advantage in experimental and theoretical research directed to 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine and its derivatives [1–5]
Application of the ultrasonic medium in the reacting of nickel(II) chloride hexahydrate salt with commercial tptz ligand enabled the generation of {[Ni(tptz)Cl(H2O)2][Ni(tptz)(H2O)3]}3Cl.5H2O complexes in one matrix
The [Ni2Cl4] matrix was decomposed in the fourth step in one complicated step, since the four chloride, atoms were lost and one oxygen atom was combined to the nickel centers to produce nickel oxide (NiO) with 11.2% weight lost at TDTG = 690 ◦C temperature
Summary
There has been a rising advantage in experimental and theoretical research directed to 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine (tptz) and its derivatives [1–5]. Noncovalent interactions, such as stacking and H-bonding play significant roles in the process of crystallization [6–12]. The double 1:1 co-crystallized nickel(II) centers complex with neutral 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine ligand was used to form {[Ni(tptz)Cl(H2O)2][Ni(tptz)(H2O)3]}3Cl.5H2O moiety matrix, {[Ni(tptz)Cl(H2O)2] and [Ni(tptz)(H2O)3] complexes have been reported separately. Application of the ultrasonic medium in the reacting of nickel(II) chloride hexahydrate salt with commercial tptz ligand enabled the generation of {[Ni(tptz)Cl(H2O)2][Ni(tptz)(H2O)3]}3Cl.5H2O complexes in one matrix. All the chemicals and solvents were of reagent grade and used without further purification Chemicals such as Nickel(II) chloride hexahydrate salt and 2,4,6-tri(pyridin-2yl)-1,3,5-triazine were purchased from Fluka Switzerland. Ultrasonic generators were carried out on an Ultrasonic PP SONICA-2200 EP (SOLTEC Srl, Milano, Italy), input: 50–60 Hz/305 W, the rod was immersed in the reaction mixture and pulsed for 10 s, rested for 20 s, ongoing for 5 min, which was enough to turn the color of reaction mixture to brown, a sign that the complexation reaction is completed; no sufficient increase in the temperature was noted
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
