Supramolecular assembly of a phosphole-based moiety into nanostructures dictated by alkynylplatinum( ii ) terpyridine complexes through non-covalent Pt⋯Pt and π–π stacking interactions: synthesis, characterization, photophysics and self-assembly behaviors

Sammual Yu-Lut Leung (1) , Sloane Evariste (2) , Christophe Lescop (2) , Muriel Hissler (2) , Vivian Wing-Wah Yam (1)

1 HKU - The University of Hong Kong
2 ISCR - Institut des Sciences Chimiques de Rennes

A new class of platinum(II) terpyridine complexes with a phosphole-derived bridging alkynyl ligand have been prepared. The X-ray crystal structure of complex 2 has been determined, and reveals a polymeric zigzag chain structure with the existence of p–p stacking interactions. The photophysical properties have also been studied, with 3 MLCT/ 3 LLCT phosphorescence exhibited in degassed CH 2 Cl 2 ; the energy of which is varied by the p-conjugation of the terpyridine ligands. The solvent-induced assembly of complex 1 has been studied. The incorporation of hydrophobic hydrocarbon chains has been shown to play an important role in assisting the formation of self-assembled nanostructures via Pt/Pt, p–p stacking and hydrophobic–hydrophobic interactions. It has been established that an isodesmic growth mechanism operates in polar media to give nanospheres, while fibrous networks originate from the self-assembly of the complexes in non-polar media, predominantly driven by p–p stacking interactions.

Domains: Chemical Sciences; Organic chemistry; Chemical Sciences; Coordination chemistry

Sammual Yu-Lut Leung, Sloane Evariste, Christophe Lescop, Muriel Hissler, Vivian Wing-Wah Yam. Supramolecular assembly of a phosphole-based moiety into nanostructures dictated by alkynylplatinum( ii ) terpyridine complexes through non-covalent Pt⋯Pt and π–π stacking interactions: synthesis, characterization, photophysics and self-assembly behaviors. Chemical Science, 2017, 8 (6), pp.4264-4273. ⟨10.1039/C7SC00041C⟩. ⟨hal-01511209⟩