Chowdhury, Santanu published the artcileA new luminescent sulfate bridged dimeric copper(II) complex with DNA binding and SO2 fixation ability: Synthesis and structure, Computed Properties of 2215-33-0, the publication is Polyhedron (2009), 28(17), 3863-3871, database is CAplus.
New luminescent mononuclear and dinuclear Cu(II) (S = 1/2) complexes [Cu(HL)(H2O)2](ClO4)2 (1a) and [Cu2(HL)2(μ-SO4)2]·2H2O (1b) were synthesized with the acyclic tridentate pyridine-2-carboxaldehyde-2-pyridylhydrazone ligand, HL (1). The mononuclear complex 1a can be converted into the disulfate bridged dimeric Cu(II) complex 1b by passing freshly prepared SO2 through the basic medium. On excitation at 290 nm, the ligand fluoresces at 364 nm due to an intraligand 1(π-π*) transition. Upon complexation with Cu(II), the emission peak is slightly blue shifted (356 nm, F/F 0 0.76 for 1a and 354 nm, F/F 0 0.89 for 1b) with a little quenching in the emission intensity. The association constants (Kass (5.06 ± 0.004) × 104 for 1a and Kass (5.46 ± 0.006) × 104 for 1b at 298 K) and the thermodn. parameters were determined by UV-visible spectroscopy. The mol. structure of the complex 1b (Cu···Cu 4.456 Å) was determined by single crystal x-ray diffraction studies. The complex 1b exhibits a strong interaction towards DNA as revealed from the Kb (intrinsic binding constant) 6.3 × 104 M-1 and Ksv (Stern-Volmer quenching constant) 2.93 values.
Polyhedron published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Computed Properties of 2215-33-0.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem