Luminescence gold complexes

Of all these, the only permitted electronic transition is1 Do < 1S0, while the rest are forbidden according to the spin rule, leading to phosphorescent emissions. However, these are precisely the ones responsible for the emissions found in many luminescent gold complexes, appearing in a range between 500 and 700 nm (665 nm in the gaseous ion). 

Data reported for compound 17a revealed that excitation at = 332 nm afforded emissions in the solid state at = 482 nm at room temperature and = 465 nm at 77 K, while an acetone solution produced = 429 following excitation at = 379 nm. As the data for compound 17b showed little difference in photophysical behavior, the authors concluded that this emission could not result from a phosphine-located excitation. At this time no other rationale was offered for the lack of luminescence from the parent closo species 16 other than a significant change in electronic structure. Nevertheless, the ligating ability of the phosphine arms in the nido compounds 17 was exploited to produce luminescent gold complexes, which is discussed in the next section. 

Apart from gold(I) phosphine systems, gold(I) chalcogenido and thiolato complexes represent another fast growing area of research in luminescent gold complexes. One of the reasons for such... 

Forward, J.M., Fackler, J.P. and Staples, R.J. (1995) Synthesis and structural characterization of the luminescent Gold(I) Complex [(MeTPAJjAulJIj. Use of NaBPha as a phenyl transfer reagent to form [(MeTPA)AuPh](BPh4) and (TPA) AuPh. Organometallics, 14, 4194—4198. 

Bardaji, M., Laguna, A., Vicente, J. and Jones, P.G. (2001) Synthesis of Luminescent Gold(l) and Gold(111) Complexes with a Triphosphine Ligand. Inorganic Chemistry, 40(12), 2675-2681. 

Luminescent gold(l) acetylide complexes. Photophysical and photoredox properties and crystal structure of [ Au(C = CPh) 2 (p-Ph2PCH2CH2PPh2)]. Journal of the Chemical Society, Dalton Transactions, 2929-2932 (d) Che, C.-M., Wong, W.-T., Lai, T.-F. and Kwong, H.-L. (1989) Novel luminescent binuclear gold(I) isocyanide complexes. Synthesis, spectroscopy, and X-ray crystal structure of Au2(dmh)(CN)2 (dmb = 1,8-di-isocyano-p-menfhane). Journal of the Chemical Society, Chemical Communications, 243-244. 

Catalano, V.J. and Horner, S.J. (2003) Luminescent gold(l) and silver(l) complexes of 2-(diphenylphosphino)-l-methylimidazole (dpim) Characterization of a three-coordinate Au(l)-Ag(l) dimer with a short metal-metal separation. Inorganic Chemistry, 42, 8430-8438. 

In the solid state, the complexes exhibit a yellow-green luminescence under UV irradiation (365 nm). All the emission spectra are similar and consist of three broad emissions above 370 nm (e.g., 384, 490 and 524 nm for m = 10, w = 6), while the free isocyanides (white solids) are luminescent giving one strong emission band with its maximum at about 360 nm. In dicMoromethane solution both the free isocyanides and their gold complexes are luminescent too, but only one intense emission is observed for the complexes in the range of 345-387nm (Figure 8.14). The lifetime... 

Many gold(I) complexes are susceptible of having optical properties and consequently in the last few years several reports have dealt with luminescence in gold complexes.34,42,43 It has been shown... 

The aim of this chapter is to review the chemistry of chalcogenolates in the last 10 years. The more recent reviews in this field included chalcogenolates of the s-block elements,13,14 early transition metal thiolates,15 metal complexes with selenolate and tellurolate ligands,16 copper(I), lithium and magnesium thiolates,17 functionalized thiolate complexes,18 19 pentafluorobenzenethiolate platinum group compounds,20 tellurium derivatives,21 luminescent gold compounds,22 and complexes with lanthanide or actinide.23... 

Luminescent, trinuclear-mixed dithiocarbamato-xanthato gold complexes, [Au3Cl(S2CNR2)(S2COEt)(p-dpmp)] where R = Me, CH2Ph and dpmp = fe(diphenylphosphinomethyl)phenylphosphine, PhP(CH2PPh2)2 have been prepared and their optical properties were investigated.398... 

Y Ma, CM Che, HY Chao, X Zhou, WH Chan, and J Shen, High luminescence gold(I) and copper(I) complexes with a triplet excited state for use in light-emitting diodes, Adv. Mater., 11 852-857, 1999. 

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