Luminescent Metallogels of Bis-Cyclometalated Alkynylgold(III) Complexes

A series of luminescent bis-cyclometalated alkynylgold­(III) complexes have been synthesized and characterized. Some of the complexes have been demonstrated to exhibit gelation properties driven by π–π stacking and hydrophobic–hydrophobic interactions. The gelation properties have been investigated in detail through variable-temperature UV–vis absorption and emission studies, and the morphology of the gels has also been characterized by scanning electron microscopy and transmission electron microscopy

Luminescent Metallogels of Bis-Cyclometalated Alkynylgold(III) Complexes

A series of luminescent bis-cyclometalated alkynylgold­(III) complexes have been synthesized and characterized. Some of the complexes have been demonstrated to exhibit gelation properties driven by π–π stacking and hydrophobic–hydrophobic interactions. The gelation properties have been investigated in detail through variable-temperature UV–vis absorption and emission studies, and the morphology of the gels has also been characterized by scanning electron microscopy and transmission electron microscopy

Luminescent Metallogels of Bis-Cyclometalated Alkynylgold(III) Complexes

A series of luminescent bis-cyclometalated alkynylgold­(III) complexes have been synthesized and characterized. Some of the complexes have been demonstrated to exhibit gelation properties driven by π–π stacking and hydrophobic–hydrophobic interactions. The gelation properties have been investigated in detail through variable-temperature UV–vis absorption and emission studies, and the morphology of the gels has also been characterized by scanning electron microscopy and transmission electron microscopy

Synthesis, Characterization, and Luminescence Studies of Discrete Polynuclear Gold(I) Sulfido and Selenido Complexes with Intramolecular Aurophilic Contacts

The synthesis, characterization, and photophysical and photochemical properties of a family of high-nuclearity gold­(I) chalcogenides, specifically, the gold­(I) sulfido and selenido complexes containing different bridging diphosphine ligands with nuclearities of ten ([Au₁₀{μ-Ph₂PN­(R)­PPh₂}₄(μ₃-E)₄]²⁺) and six ([Au₆{μ-Ph₂PN­(R)­PPh₂}₃­(μ₃-E)₂]²⁺), are reported. The X-ray crystal structures of the complex cations of Au₁₀ and Au₆ are found to be propeller-like structures and distorted cubane structures, respectively, with the presence of short intramolecular gold^...gold distances. The complexes show intense green and/or orange phosphorescence upon photoexcitation in the solid state and in solution at ambient and low temperature. The emission properties are found to be strongly dependent on the nuclearities and the chalcogenido ligands, but are rather insensitive to the substituents on the bis­(diphenylphosphino)­amines. The emissions are tentatively assigned to originate from the excited states derived from the phosphine-centered intraligand (IL) transition or metal-centered (ds/dp) mixed with ligand-to-metal–metal charge transfer (LMMCT) (E→Au) transition. The photochemical properties of the complexes were also studied by transient absorption spectroscopy

Synthesis, Characterization, and Luminescence Studies of Discrete Polynuclear Gold(I) Sulfido and Selenido Complexes with Intramolecular Aurophilic Contacts

The synthesis, characterization, and photophysical and photochemical properties of a family of high-nuclearity gold­(I) chalcogenides, specifically, the gold­(I) sulfido and selenido complexes containing different bridging diphosphine ligands with nuclearities of ten ([Au₁₀{μ-Ph₂PN­(R)­PPh₂}₄(μ₃-E)₄]²⁺) and six ([Au₆{μ-Ph₂PN­(R)­PPh₂}₃­(μ₃-E)₂]²⁺), are reported. The X-ray crystal structures of the complex cations of Au₁₀ and Au₆ are found to be propeller-like structures and distorted cubane structures, respectively, with the presence of short intramolecular gold^...gold distances. The complexes show intense green and/or orange phosphorescence upon photoexcitation in the solid state and in solution at ambient and low temperature. The emission properties are found to be strongly dependent on the nuclearities and the chalcogenido ligands, but are rather insensitive to the substituents on the bis­(diphenylphosphino)­amines. The emissions are tentatively assigned to originate from the excited states derived from the phosphine-centered intraligand (IL) transition or metal-centered (ds/dp) mixed with ligand-to-metal–metal charge transfer (LMMCT) (E→Au) transition. The photochemical properties of the complexes were also studied by transient absorption spectroscopy

Functionalized Bis-Cyclometalated Alkynylgold(III) Complexes: Synthesis, Characterization, Electrochemistry, Photophysics, Photochemistry, and Electroluminescence Studies

A series of luminescent alkynylgold­(III) complexes containing various tridentate bis-cyclometalating ligands derived from 2,6-diphenylpyridine (R-C^∧N^∧C), [Au­(R-C^∧N^∧C)­(CCC₆H₄R′)] has been successfully synthesized and characterized. Complexes <b>1</b> and <b>6</b> have been determined by X-ray crystallography. Electrochemical studies show a ligand-centered reduction that originated from the tridentate R-C^∧N^∧C pincer ligands and an alkynyl-centered oxidation. The photophysical properties of the complexes have been studied in detail by electronic absorption and emission studies. Tunable photoluminescence behaviors have been observed, with the emission maxima spanning through the visible region from 476 to 669 nm in dichloromethane at room temperature, and the complexes were also found to be emissive in various media at both room and low temperatures. Transient absorption studies have been conducted to investigate the excited state properties of the complexes. Furthermore, selected complexes have been incorporated into the emissive layer (EML) of organic light-emitting devices (OLEDs) and have demonstrated interesting electroluminescence

Functionalized Bis-Cyclometalated Alkynylgold(III) Complexes: Synthesis, Characterization, Electrochemistry, Photophysics, Photochemistry, and Electroluminescence Studies

A series of luminescent alkynylgold­(III) complexes containing various tridentate bis-cyclometalating ligands derived from 2,6-diphenylpyridine (R-C^∧N^∧C), [Au­(R-C^∧N^∧C)­(CCC₆H₄R′)] has been successfully synthesized and characterized. Complexes <b>1</b> and <b>6</b> have been determined by X-ray crystallography. Electrochemical studies show a ligand-centered reduction that originated from the tridentate R-C^∧N^∧C pincer ligands and an alkynyl-centered oxidation. The photophysical properties of the complexes have been studied in detail by electronic absorption and emission studies. Tunable photoluminescence behaviors have been observed, with the emission maxima spanning through the visible region from 476 to 669 nm in dichloromethane at room temperature, and the complexes were also found to be emissive in various media at both room and low temperatures. Transient absorption studies have been conducted to investigate the excited state properties of the complexes. Furthermore, selected complexes have been incorporated into the emissive layer (EML) of organic light-emitting devices (OLEDs) and have demonstrated interesting electroluminescence

Luminescence Color Tuning by Regulating Electrostatic Interaction in Light-Emitting Devices and Two-Photon Excited Information Decryption

It is well-known that the variation of noncovalent interactions of luminophores, such as π–π interaction, metal-to-metal interaction, and hydrogen-bonding interaction, can regulate their emission colors. Electrostatic interaction is also an important noncovalent interaction. However, very few examples of luminescence color tuning induced by electrostatic interaction were reported. Herein, a series of Zn­(II)-bis­(terpyridine) complexes (<b>Zn-AcO</b>, <b>Zn-BF</b>_<b>4</b>, <b>Zn-ClO</b>_<b>4</b>, and <b>Zn-PF</b>_<b>6</b>) containing different anionic counterions were reported, which exhibit counterion-dependent emission colors from green-yellow to orange-red (549 to 622 nm) in CH₂Cl₂ solution. More importantly, it was found that the excited states of these Zn­(II) complexes can be regulated by changing the electrostatic interaction between Zn²⁺ and counterions. On the basis of this controllable excited state, white light emission has been achieved by a single molecule, and a white light-emitting device has been fabricated. Moreover, a novel type of data decryption system with <b>Zn-PF</b>_<b>6</b> as the optical recording medium has been developed by the two-photon excitation technique. Our results suggest that rationally controlled excited states of these Zn­(II) complexes by regulating electrostatic interaction have promising applications in various optoelectronic fields, such as light-emitting devices, information recording, security protection, and so on