Issue 44, 2015

Structures and luminescence properties of diethyldithiocarbamate-bridged polynuclear gold(i) cluster complexes with diphosphine/triphosphine

Abstract

A series of polynuclear gold(I) complexes with bridging diethyldithiocarbamate (Et2dtc) and diphosphine/triphosphine were synthesized, including [{Au2(μ-dpb)(μ-Et2dtc)}SbF6]n (1, dpb = 1,4-bis(diphenylphosphino)benzene), [Au2(μ-dpb)(Et2dtc)2] (2), [Au4(μ-dpn)(μ-Et2dtc)3](SbF6) (3, dpn = 1,4-bis(diphenylphosphino)naphthalene), [Au4(μ-dpn)(μ-Et2dtc)3][Au(Et2dtc)2](SbF6)2 (4), [Au4(μ-dpa)(Et2dtc)3](SbF6) (5, dpa = 9,10-bis(diphenylphosphino)anthracene) and [{Au6(dpep)2(Et2dtc)3}{(SbF6)3}]n (6, dpep = bis(2-diphenylphosphinoethyl)phenylphosphine). The structures of 3·CH2Cl2, 4·2CH2Cl2, 5·2CH2Cl2·H2O and 6 were characterized by X-ray crystallography. The intramolecular Au⋯Au distances across bridging Et2dtc are 2.9376(7)–2.9725(8) Å in 3·CH2Cl2, 2.9762(16)–3.1078(14) Å in 4·2CH2Cl2, 2.9288(9)–3.0514(10) Å in 5·2CH2Cl2·H2O, and 2.9236(12)–3.1914(17) Å in 6, implying significant aurophilic interactions. These gold(I) complexes exhibit intense photoluminescence properties in solid state. Upon lowering the temperature from 298 to 77 K, complexes 5 and 6 exhibit an obvious red-shift from 536 nm to 589 nm for 5 and from 538 nm to 564 nm for 6, implying significant luminescence thermochromism due to thermal contraction upon cooling.

Graphical abstract: Structures and luminescence properties of diethyldithiocarbamate-bridged polynuclear gold(i) cluster complexes with diphosphine/triphosphine

Supplementary files

Article information

Article type
Paper
Submitted
30 Jan 2015
Accepted
30 Mar 2015
First published
09 Apr 2015

RSC Adv., 2015,5, 34992-34998

Structures and luminescence properties of diethyldithiocarbamate-bridged polynuclear gold(I) cluster complexes with diphosphine/triphosphine

J. Li, X. Zhu, L. Zhang and Z. Chen, RSC Adv., 2015, 5, 34992 DOI: 10.1039/C5RA01831E

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