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
Sammual Yu-Lut LeungVivian Wing-Wah Yam

Abstract

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 zig-zag chain structure with the existence of π-π stacking interactions. The photophysical properties have also been studied, with (3)MLCT/(3)LLCT phosphorescence exhibited in degassed CH2Cl2; the energy of which is varied by the π-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, π-π 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 π-π stacking interactions.

References

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Citations

Dec 2, 2017·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Yuanxin WeiSteve Scheiner
Dec 9, 2017·Chemistry : a European Journal·Elena LalindeSergio Piñeiro-Hermida
Apr 11, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Sourenjit NaskarPradyut Ghosh
Mar 31, 2018·Chemistry : a European Journal·Kondalarao Kotturi, Eric Masson
Nov 10, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Hajar MolaeeMozhgan Samandar Sangari
Oct 13, 2017·Angewandte Chemie·Cally J E HaynesJonathan R Nitschke

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Methods Mentioned

BETA
X-ray
AFM
column chromatography
NMR

Software Mentioned

SHELXL
SIR97
SCALEPACK
DENZO
SQUEEZE
KappaCCD

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