Photophysical and optical power limiting behaviors of Au(I) acetylides with diethynyl aromatic ligands showing different electronic features

Liu, Boao; Tian, Zhongmin; Dang, Feifan; Zhao, Jiang; Yan, Xiaogang; Xu, Xianbin; Yang, Xiaolong; Zhou, Guijiang; Wu, Yong

doi:10.1016/j.jorganchem.2015.12.036

Cited by 15 publications

(5 citation statements)

References 56 publications

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“…To date, investigations of dinuclear gold(I) complexes have emphasized chromophoric bridging alkynyls attached to (phosphine)gold(I) centers. − Wu and co-workers reported the synthesis and photophysics (including fluorescence lifetimes and excited-state quantum yields) of laterally symmetric dinuclear gold(I) phosphines with variations in the bridging alkynyl chromophore . Schanze and co-workers conducted two separate photophysical studies comparing laterally symmetric dinuclear gold(I) and platinum(II) alkynyls. , In those reports, variations in the bridging chromophore or ancillary ligand were not explored.…”

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confidence: 99%

Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics

et al. 2020

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Four new laterally asymmetric dinuclear gold(I) complexes made from a new chromophoric ligand (Au-DiBTF0− 3) have been characterized. Changing the organic ancillary ligand from a phosphine ((Au-DiBTF0 (PMe 3 ) and Au-DiBTF1 (PCy 3 )) to an N-heterocyclic carbene (Au-DiBTF2) with an alkynyl linking moiety or modifying the alkynyl linkage to a triazolyl moiety with the ancillary ligand being an N-heterocyclic carbene (Au-DiBTF3) impacts the ground-and excited-state properties of these systems. All four complexes exhibit structured absorption and emission spectra with weak phosphorescence. A bathochromic shift is observed in both the ground-state absorption and luminescence spectra as the series varies from Au-DiBTF0 to Au-DiBTF3. The dinuclear alkynyl complexes (Au-DiBTF0−2) display decreased fluorescence lifetimes and fluorescence quantum yields along with more efficient intersystem crossing when the capping ligand is changed from a trialkylphosphine to an N-heterocyclic carbene. This change results in comparable rates of radiative decay and intersystem crossing and negligible rates of nonradiative decay. Changing the π-bridging moiety (Au-DiBTF3) results in a diminished fluorescence quantum yield, shorter fluorescence lifetime, and increased intersystem quantum yield, resulting in faster intersystem crossing accompanied by slower radiative decay and more efficient nonradiative decay relative to the alkynyl-bridged complexes. Density functional theory calculations are in accord with the observed photophysics, with nearly identical S 1 -to-T 2 energy gaps for the dinuclear alkynyl complexes (Au-DiBTF0 and -2) and a smaller energy gap for Au-DiBTF3. Experimentally, Au-DiBTF3 has the highest rate constant and quantum yield of intersystem crossing of the new gold(I) organometallics.

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confidence: 99%

Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics

et al. 2020

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“…Other reagents were purchased from commercial sources without further purification. 2,7-Di- tert -butyl-4,5-diethynyl-9,10-dihydroacridin -9-one (H 2 L) was similarly prepared by previously reported procedure [ 29 ]. Perchlorate salts are potentially explosive and should be handled carefully.…”

Section: Methodsmentioning

confidence: 99%

Heteroctanuclear Au4Ag4 Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism

et al. 2022

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Two heteroctanuclear Au4Ag4 cluster complexes of 4,5-diethynylacridin-9-one (H2L) were prepared through the self-assembly reactions of [Au(tht)2](CF3SO3), Ag(tht)(CF3SO3), H2L and PPh3 or PPh2Py (2-(diphenylphosphino)pyridine). The Au4Ag4 cluster consists of a [Au4L4]4− and four [Ag(PPh3)]+ or [Ag(PPh2Py)]+ units with Au4L4 framework exhibiting a twisted paper clip structure. In CH2Cl2 solutions at ambient temperature, both compounds show ligand fluorescence at ca. 463 nm as well as phosphorescence at 650 nm for 1 and 630 nm for 2 resulting from admixture of 3IL (intraligand) of L ligand, 3LMCT (from L ligand to Au4Ag4) and 3MC (metal-cluster) triplet states. Crystals or crystalline powders manifest bright yellow-green phosphorescence with vibronic-structured emission bands at 530 (568sh) nm for complex 1 and 536 (576sh) nm for complex 2. Upon mechanical grinding, yellow-green emission in the crystalline state is dramatically converted to red luminescence centered at ca. 610 nm with a drastic redshift of the emission after crystal packing is destroyed.

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“…Among the Au(I) acetylides 68-71, 68 demonstrated a remarkable transparency (λ max = 361 nm and λ cut-off = 372 nm) and comparable OPL performance to C 60 with the σ ex /σ o value of 9.76. [31,62] The electronic properties of ligands also play an important role in determining the OPL capability of these Au(I)…”

Section: Chemistry Authors Up Closementioning

confidence: 99%

“…Among the Au(I) acetylides 68 — 71 , 68 demonstrated a remarkable transparency ( λ max = 361 nm and λ cut‐off = 372 nm) and comparable OPL performance to C 60 with the σ ex / σ o value of 9.76. [ 31,62 ] The electronic properties of ligands also play an important role in determining the OPL capability of these Au(I) complexes. As illustrated in Figure 13c, 69 and 70 gave negligible absorption peaks in the visible‐light region, leading to their better transparency compared with 71 .…”

Section: Applicationsmentioning

confidence: 99%

Polymetallaynes and Molecular Metallaynes Containing Platinum, Mercury and Gold for Optoelectronic and Magnetic Applications

Zhang

Wong

2023

Chin. J. Chem.

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Comprehensive Summary Polymetallaynes are a promising branch of metallopolymers, in which the introduction of metal building blocks to organic conjugated backbones leads to their unique skeletons and versatile properties. Notably, the chemical structures, geometric configurations and functional properties in these organometallic systems can be adjusted flexibly by the appropriate selection of metal centers, auxiliary ligands, or bridging spacers. In recent years, both one‐dimensional and two‐dimensional polymetallaynes have attracted considerable attention owing to their excellent electronic, optical and magnetic properties. Furthermore, the studies on molecular metallaynes provide substantial insights for the exploration of the structure‐property‐activity relationships in these organometallic acetylide‐containing systems. The recent research progress of polymeric and molecular metallaynes containing platinum, mercury and gold is discussed in this article. A series of functional properties have been realized in these acetylide‐containing compounds by the rational structural design and refined synthetic strategies, leading to their emerging applications including energy conversion, nonlinear optics, data storage and memory, as well as chemo/biosensing. What is the most favorite and original chemistry developed in your research group? Chemistry plays a key role in providing solutions to many of the challenges facing the world today. In particular, an understanding of chemistry is essential as the basis for medicine and public health, in addressing challenges such as global climate change, in providing sustainable sources of clean energy, and in maintaining the environment for the well‐being of people. We aim at the cutting‐edge research areas of photofunctional metal‐organic molecules and polymers for optoelectronic and energy‐related applications. Photofunctional molecular materials are considered as versatile materials for energy interconversions and optoelectronic/photonic applications, including electrical energy generation in organic solar cells (OSCs) and light generation in organic light‐emitting diodes (OLEDs), as they offer a low cost, light weight and simple option for device fabrication. We have developed new synthetic methods to produce technologically useful materials (e.g., metallopolymers and metallophosphors) with specific functional roles. Such research clearly presents a promising way out of the worldwide energy problem. What is the most important personality for scientific research? Although there is no guarantee of success and practical gains in doing research, it is my belief that our efforts will get harvest if we work hard and do not give up. Patience, diligence, perseverence and confidence are the prerequisites for the successful research study. Besides, there are many good research opportunities in the Greater Bay Area and the Mainland by collaborating with the top researchers there in various joint projects, which would create more impact cases for the betterment of our society. How do y...

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Photophysical and optical power limiting behaviors of Au(I) acetylides with diethynyl aromatic ligands showing different electronic features

Cited by 15 publications

References 56 publications

Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics

Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics

Heteroctanuclear Au4Ag4 Cluster Complexes of 4,5-Diethynylacridin-9-One with Luminescent Mechanochromism

Polymetallaynes and Molecular Metallaynes Containing Platinum, Mercury and Gold for Optoelectronic and Magnetic Applications

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