Details

Autor(en) / Beteiligte

• Roberts, Ryan J
• Ahern, John C
• Patterson, Howard H
• Leznoff, Daniel B

Titel

Ce/Au(CN) sub(2) super(-)-B ased Coordination Polymers Containing and Lacking Aurophilic Interactions

Ist Teil von

• European journal of inorganic chemistry, 2016-05, Vol.2016 (13-14), p.2082-2087

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• New members of the Ln[Au(CN) sub(2)] sub(3).3H sub(2)O and [nBu sub(4)N] sub(2)[Ln(NO sub(3)) sub(4)Au(CN) sub(2)] series Ln = Ce (CeAu sub(3) and CeAu respectively) are reported herein where their synthesis, structure and photoluminescence properties are discussed. The first is a 3-D coordination polymer with aurophilic interactions of 3.35 Aa and the latter is a 1-D coordination polymer that lacks them. At 293 K both CeAu sub(3) and CeAu display characteristic Ce super(III)-based emission at lambda sub(max) = 393 nm (5d arrow right super(2)F sub(J)), however in CeAu sub(3) Au super(I)-based emission ( lambda sub(max) = 410, super(1)MLCT) dominates the spectrum. At 77 K however, the dominant emission is Au super(I)-based with characteristic emissions of lambda sub(max) = 430 nm ( super(1)MLCT) and 490 nm ( super(3)MLCT). The key difference in the luminescence of these two materials can be rationalized in terms of their respective structures, through either the aurophilic network and lack thereof and/or the rigidity offered in the 3-D structure of CeAu sub(3). Cerium analogues of [nBu sub(4)N] sub(2)[Ln(NO sub(3)) sub(4)Au(CN) sub(2)] and Ln[Au(CN) sub(2)] sub(3).3H sub(2)O systems have been synthesized and characterized with an emphasis on their luminescence properties at 293 and 77 K. These differ in the dominant emissive pathway and can be rationalized based on their respective structure.