Birefringent, emissive cyanometallate-based coordination polymer materials containing group(II) metal-terpyridine building blocks

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• 作者：John R. Thompson ; Kevin A.S. Goodman-Rendall ; Daniel B. Leznoff ; ^{dleznoff@sfu.ca" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Coordination polymers ; Birefringence ; Emissive materials ; Supramolecular ; 2 ; 2&prime ; 6&prime ; 2&Prime ; -Terpyridine
• 刊名：Polyhedron
• 出版年：2016
• 出版时间：29 March 2016
• 年：2016
• 卷：108
• 期：Complete
• 页码：93-99
• 全文大小：1445 K

文摘

A series of group(II) metal 2,2^′;6^′2^″-terpyridine (terpy) complex-based coordination polymers has been synthesized and characterised for their photo-physical and optical properties. Sr(OH₂)(terpy)[Au(CN)₂]₂ forms a 1D chain through bridging [Au(CN)₂]⁻ units, with aurophilic interactions (3.1403(6) and 3.468(6) Å) between chains creating a 2D network. Mg(OH₂)(terpy)[Pt(CN)₄] forms a 1D coordination polymer through bridging [Pt(CN)₄]²⁻ linkers, with a 3D structure formed through hydrogen bonds between the unbound N-cyano groups of [Pt(CN)₄]²⁻ and the Mg–OH₂ units on adjacent chains. M(terpy)[Pt(CN)₄] forms an isostructural set for M = Ca, Sr, Ba consisting of a 3D network through bridging [Pt(CN)₄]²⁻ linkers. All compounds show terpy-based emission while Sr(OH₂)(terpy)[Au(CN)₂]₂ may also contain aurophilicity-based emission. The materials all show substantial birefringence, with Δn$\mathrm{\Delta }n$ values ranging from 0.31(3) to 0.46(1), the magnitude of which correlates to the orientation of the terpy units relative to the viewing axis of the crystals.