Single-Turn Helix–Coil Strands Stabilized by Metal···Metal and π–π Interactions of the Alkynylplatinum(II) Terpyridyl Moieties in meta-Phenylene Ethynylene Foldamers | Zendy

Sammual YuLut Leung | Zendy; Anthony YiuYan Tam | Zendy; ChiHang Tao | Zendy; Hoi Shan Chow | Zendy; Vivian WingWah Yam | Zendy

Open Access

Single-Turn Helix–Coil Strands Stabilized by Metal···Metal and π–π Interactions of the Alkynylplatinum(II) Terpyridyl Moieties in meta-Phenylene Ethynylene Foldamers

Author(s) -

Sammual YuLut Leung,

Anthony YiuYan Tam,

ChiHang Tao,

Hoi Shan Chow,

Vivian WingWah Yam

Publication year - 2011

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja208444c

Subject(s) - chemistry , steric effects , terpyridine , intramolecular force , crystallography , phenylene , stacking , folding (dsp implementation) , metal , stereochemistry , polymer , organic chemistry , electrical engineering , engineering

Dinuclear alkynylplatinum(II) terpyridyl complexes with oligomeric bridge consisting of five repeating meta-phenylene ethynylene (mPE) units have been found to exhibit a strong tendency to fold back onto themselves to form short helical strands through the stabilization of Pt···Pt and π-π interactions. The steric bulk of the terpyridine ligands and the length of the oligomeric bridge have been found to affect the extent of the intramolecular Pt···Pt interaction that governs the stabilization of the short helical strand in solution. Their folding properties via Pt···Pt and π-π stacking interactions have been studied by (1)H NMR, 2D ROESY NMR, electronic absorption, and emission spectroscopies.

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