Single-crystal luminescence study of the layered compound potassium dicyanoaurate

Nagasundaram, N.; Roper, G.; Biscoe, J.; Chai, Jian-Fang; Patterson, Howard H.; Blom, Nils; Lüdi, A.

doi:10.1021/ic00237a006

Cited by 71 publications

(58 citation statements)

References 2 publications

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“…The complex molecules associated with the lattice water would undergo spin-crossover at a different, probably higher, temperature from those that are not [9,11]. bonding [14,15,21,34]. While many such compounds are only emissive below 200 K in the solid state, significant emission at room temperature can also be sometimes observed [21,34].…”

Section: Resultsmentioning

confidence: 99%

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Four new spin-crossover salts of [Fe(3-bpp)2]2+ (3-bpp=2,6-bis[1H-pyrazol-3-yl]pyridine)

et al. 2013

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Section: Resultsmentioning

confidence: 99%

“…bonding [14,15,21,34]. While many such compounds are only emissive below 200 K in the solid state, significant emission at room temperature can also be sometimes observed [21,34]. Hence the [M 3 (CN) 6 ] 3-centres in 1 and 2 ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Four new spin-crossover salts of [Fe(3-bpp)2]2+ (3-bpp=2,6-bis[1H-pyrazol-3-yl]pyridine)

et al. 2013

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“…Patterson et al performed a thorough photophysical study of the solid state [10] and solution ground and excited states properties [11,12] of the potassium salt, suggesting that in the solid state the strength of the metal-metal interactions has a great effect on luminescence.…”

Section: Network From Mononuclear Unitsmentioning

confidence: 99%

Luminescence of Supramolecular Gold‐Containing Materials

López‐de‐Luzuriaga

2008

Modern Supramolecular Gold Chemistry

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In addition to the characteristics that make gold a unique element, such as the lowest electrochemical potential of all metals, its high electronegativity, or the fact that it may have a mononegative oxidation state, perhaps the most intriguing characteristic is the tendency of many gold complexes to aggregate into oligomers or supramolecular assemblies through metal-metal interactions. This fact, far from being a chemical curiosity, has become an object of study because of the associated properties. One of the most studied properties and that which involves many groups all over the world is the luminescence displayed by many gold-containing complexes. In fact, after the discovery of the luminescence of the three-coordinate complex [AuCl(PPh 3 ) 2 ] by Dori and coworkers in 1970 [1], the number of groups that have studied this topic has increased rapidly in recent years, together with the number of synthesized luminescent gold molecules. At the same time, the large number of studies performed in this area has provided knowledge of the conditions that gold complexes require to display luminescence. For instance, luminescence can originate from ligands, assigned to certain geometries around the gold atom or from the presence of metal-metal interactions in the complexes. More specifically, it can be produced by transitions between orbitals of the metal center exclusively, in orbitals of the ligands, usually among p orbitals, or in transitions involving both metal and ligands, where these can act as donors or acceptors of electronic density (charge transfer transitions). In gold (I), with a d 10 closed shell configuration, the ground state is 1 S 0 , while the excited states are 3 D 2 , 3 D 1 , 3 D 0 and 1 D 0 (see Figure 6.1) [2].Of all these, the only permitted electronic transition is 1 D 0 1 S 0 , 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). j347Another very important factor that should be considered is the expected large spin-orbit effect promoted by a heavy atom such as gold. This effect produces a relaxation of the spin rule and makes orbital forbiddenness instead of the spin rule the key factor for determining whether a gold complex will show luminescence. For instance, phosphorescence is generally not observed for linear molecules (where the ligands are not involved in the transitions), since the mixing of s, p z and d z 2 of gold form a HOMO of S þ symmetry, while the LUMO orbital is formed mainly from p x and p y leading to a P symmetry, consequently, there is no orbital forbiddenness in the transition and phosphorescence is not observed [3]. Another possible coordination environment at gold is the tetrahedral one. In that case, the HOMO and the LUMO are 1 T 2 in symmetry and the transition is allowed according to Laportes rule; therefore, phosphorescence is not observed in thes...

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“…In addition, they are photoluminescent in the visible range due to their metal-to-ligand charge transfer (MLCT) transition [27,28]. They were found to be attractive for the sensitization of lanthanide(3+) luminescence, which was precisely investigated for the family of classical three-dimensional [Ln III (H 2 O) 3 ][M I (CN) 2 ] 3 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy; M = Ag, Au) coordination polymers (Figure 1, Table 1) [55,56,57,58,59,60,61,62,63,64,65,66,67,68,69].…”

Section: Dicyanidometallates [Mi(cn)2]− (M = Ag Au)mentioning

confidence: 99%

“…Such spectroscopic behaviour makes them the great candidates for the sensitization of luminescent trivalent lanthanide ions. In addition, some of the polycyanidometallates of transition metal ions reveal the intrinsic photoluminescent properties related to the metal-centred (MC) d-d transitions, the metal-to-ligand charge transfer (MLCT), or the opposite ligand-to-metal charge transfer (LMCT) effects [27,28,29,30,31,32,33]. …”

Section: Introductionmentioning

confidence: 99%

Lanthanide Photoluminescence in Heterometallic Polycyanidometallate-Based Coordination Networks

2017

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Solid-state functional luminescent materials arouse an enormous scientific interest due to their diverse applications in lighting, display devices, photonics, optical communication, low energy scintillation, optical storage, light conversion, or photovoltaics. Among all types of solid luminophors, the emissive coordination polymers, especially those based on luminescent trivalent lanthanide ions, exhibit a particularly large scope of light-emitting functionalities, fruitfully investigated in the aspects of chemical sensing, display devices, and bioimaging. Here, we present the complete overview of one of the promising families of photoluminescent coordination compounds, that are heterometallic d–f cyanido-bridged networks composed of lanthanide(3+) ions connected through cyanide bridges with polycyanidometallates of d-block metal ions. We are showing that the combination of cationic lanthanide complexes of selected inorganic and organic ligands with anionic homoligand [M(CN)x]n− (x = 2, 4, 6 and 8) or heteroligand [M(L)(CN)4]2− (L = bidentate organic ligand, M = transition metal ions) anions is the efficient route towards the emissive coordination networks revealing important optical properties, including 4f-metal-centred visible and near-infrared emission sensitized through metal-to-metal and/or ligand-to-metal energy transfer processes, and multi-coloured photoluminescence switchable by external stimuli such as excitation wavelength, temperature, or pressure.

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Single-crystal luminescence study of the layered compound potassium dicyanoaurate

Cited by 71 publications

References 2 publications

Four new spin-crossover salts of [Fe(3-bpp)2]2+ (3-bpp=2,6-bis[1H-pyrazol-3-yl]pyridine)

Four new spin-crossover salts of [Fe(3-bpp)2]2+ (3-bpp=2,6-bis[1H-pyrazol-3-yl]pyridine)

Luminescence of Supramolecular Gold‐Containing Materials

Lanthanide Photoluminescence in Heterometallic Polycyanidometallate-Based Coordination Networks

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