Vapoluminescent Behavior and the Single‐Crystal‐to‐Single‐Crystal Transformations of Chloroform Solvates of [Au₂(μ‐1,2‐bis(diphenylarsino)ethane)₂](AsF₆)₂

Abstract

The mono‐ and di‐chloroform solvates of [Au2(μ‐1,2‐bis(diphenylarsino)ethane)2](AsF6)2 undergo single‐crystal‐to‐single‐crystal transformations that result in gain (over 12 hours) or slow loss (over five years) of only one chloroform molecule. The change in solvation results in changes in the structure and luminescence of the digold cation. The cation consists of a pair of slightly bent As‐Au‐As units that are connected through the two bridging dpae ligands and by aurophilic interactions with Au⋅⋅⋅Au contacts of 3.05152(15) Å in the disolvate or 2.9570(5) Å in the monosolvate.

Structure and Luminescence Studies of Salts of the Helical Dication, [Au2(μ-bis(diphenylphosphine)ethane)2]2+ and Comparison with Salts of [Au2(μ-bis(diphenylphosphine)propane)2]2+

“…There is a precedent for such behavior, the dimeric dication, [Au 2 (μ-dpae) 2 ] 2+ (dpae is 1,2-bis(diphenylarsino)ethane), has a helical structure analogous to that of [Au 2 (μ-dppe) 2 ] 2+ . 35 25 The observation of only a single 31 P{ 1 H} resonance could be explained by either rapid exchange of the phosphorus atoms between the two different environments seen in the crystal or by the existence of a more symmetrical, nonhelical structure like that computed by Awuah and co-workers in solution. 26 Infrared spectra are reported for these salts in the Experimental Section.…”

A Novel Photoluminescent Ag/Cu Cluster Exhibits a Chromic Photoluminescence Response towards Volatile Organic Vapors

“…Some coordination compounds can serve as photoluminescent (PL) probes for VOCs with a rapid and reversible switching or chromic response [ 1 , 2 , 3 , 4 , 5 ]. Coinage metal complexes have been developed with useful photophysical properties such as sensitive and selective emission color changes under external stimuli [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Bimetallic Ag/Cu complexes have attracted considerable attention in this respect due to their low cost and rich luminescence behaviors.…”

A PN(Pz)P ligand protected Au2Cu2complex for photoluminescent ultra-low humidity detection with reversible single-crystal-to-single-crystal transformations

“…In recent years, many photoluminescent Au/Ag/Cu complexes have been employed for the reversible detection of organic vapours such as MeOH, [6][7][8][9][10] MeCN, [11][12][13] THF, 14,15 DMSO, [16][17][18] and CH 2 Cl 2 , [19][20][21][22] as well as small inorganic molecules including H 2 , 23 O 2 , [24][25][26][27][28] CO, NO 29 and H 2 O 8,30 with good sensitivity, selectivity, reproducibility and portability. The chromic photoluminescent responses of these complexes are attributed to their weak interactions with target molecules, via H-bonding, [31][32][33] C-H⋯π 9,34,35 and π⋯π interactions, [36][37][38] molecular deformation or formation/disruption of metal-solvent bonds.…”