Synthesis, crystal structure, photophysical property and electropolymerization of Pt(II) complexes with carbazole-grafting 2-(2-pyridyl)benzimidazole

Palladium(ii) and platinum(ii) complexes with ONN donor pincer ligand: synthesis, characterization and in vitro cytotoxicity study

“…Moreover, the M–N(pyridyl) and M–N(imine) (M = Pd ( C1 ) and Pt ( C2 )) bond distances are well corroborated with the reported M–N(pyridyl) and M–N(imine) bond distances of Pd and Pt complexes. 53 Pd1–Cl1 and Pd1–Cl2 bond distances are found to be 2.270(3) Å and 2.290(3) Å, respectively, in C1 , while for the complex C2 , the Pt1–Cl1 bond distance was found to be 2.329(2) Å, which is in good agreement with that reported for palladium and platinum complexes. 3,54 The two trans angles for the Pd( ii ) complex, <Cl1–Pd1–N1 and <Cl2–Pd1–N2 were found to be 176.9(2)° and 174.9(2)°, respectively, and for the Pt( ii ) complex, <O1–Pt1–N1 and <Cl1–Pt1–N2 were found to be 172.4(2)° and 170.6(2)°, respectively, these values deviated from the ideal angle 180° leading to significant distortion in the square planar geometry of the two complexes.…”

Synthesis, characterization, and anticancer activities of lipophilic pyridinecarboxaldimine platinum(II) complexes

“…The nitrogen-platinum bonds of 2.002(2) Å (imine) and 2.018(2) Å (pyridine) are similar to those reported in other iminopyridine platinum systems[36][37][38][39][40][41][42][43][44][45][46][47][48]. The imine C(7)-N(8) distance is 1.291(4) Å and in the range of accepted carbon-nitrogen double bonds.…”

Long-Lived π-Shape Platinum(II) Diimine Complexes Bearing 7-Benzothiazolylfluoren-2-yl Motif on the Bipyridine and Acetylide Ligands: Admixing π,π* and Charge-Transfer Configurations

“…Although dual emission in Pt(II) complexes is uncommon, it is not unprecedented for organometallic complexes containing heavy transition metals, such as Ru(II) and Os(II) complexes. − Recently, dual emission in Pt(II) acetylide complexes with carbazole-grafting 2-(2-pyridyl)benzimidazole ligand or 6-phenyl-4-(9,9-dihexylfluoren-2-yl)-2,2′-bipyridine ligand, in the mononuclear Pt(II) 4-pyrenylterpyridyl complex (Pt(4′-Pyre1-T)Cl + ), in a back-to-back dinuclear Pt(II) terpyridyl complex, and in Pt(II) porphyrin–fluorene copolymers has also been reported . Moreover, the dual emission in 1a and 2a and in 1 and 2 (which will be discussed in the following paragraph) should not be surprising because as the π-conjugation of the bipyridine ligand increases, the spin–orbit coupling in the Pt(II) complex decreases because of reduced contribution of Pt-centered orbitals to the frontier molecular orbitals .…”