Synthesis, Characterization and Solvatochromism Studies of a New Mixed-ChelateCopper(ΙΙ) Complex

A new mixed-chelate copper(II) complex, [Cu(L)(acac)(ClO۴)]ClO۴ (L = ۲-[(۲-diisopropylaminoethylamino)-methyl]-pyridine), was synthesized and thoroughly characterized. X-ray diffraction confirmed itsunique, distorted square pyramidal geometry. The complex exhibited solvatochromism, with its visibleabsorption band shifting red (bathochromic shift) in different solvents. This sensitivity to solvent polaritysuggests interactions between the solvent and the weakly bound perchlorate ion. Statistical analysis (stepwisemultiple linear regression) revealed the Gutmann donor number (DN) as the key factor influencing the shift.Higher DN solvents caused a larger red shift, suggesting stronger interactions. This opens potential applicationsfor this complex as a chromogenic sensor for solvent polarity determination.

کلیدواژه ها:

Mixed-Chelate ، acetylacetonate ، diamine ligand ، copper(II) ، solvatochromism