Organometallic acetylides of PtII, AuI and HgII as new generation optical power limiting materials

Zhou, Guoquan; Wong, Wai Yeung

doi:10.1039/c0cs00094a

Cited by 337 publications

(195 citation statements)

References 121 publications

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“…For instance the platinum(II) square-planar complex trans-[P(n-Bu) 3 ] 2 Pt[(C C-p-C 6 H 4 -C C-p-C 6 H 5 ] 2 [326,346,347] was reported for efficient nonlinear absorption in solution, [326,[346][347][348] and series of derivatives were prepared with improved properties. [294,[349][350][351][352][353][354][355][356][357][358] The use of PMMA monoliths hosting platinum derivatives was an efficient route towards OPL materials. [278,359] The measured linear transmissions were nearly 90% in the visible and NLO properties were maintained in the solid.…”

Section: Dispersion Of Dyes In Sol-gel or Organic Materialsmentioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

249

116

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Research on hybrid inorganic‐organic materials has experienced an explosive growth since the 1980s, with the expansion of soft inorganic chemistry based processes. Indeed, mild synthetic conditions, low processing temperatures provided by “chimie douce” and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio to produce the so called hybrid materials. Today a high degree of control over both composition and nanostructure of these hybrids can be achieved allowing tunable structure‐property relationships. This, in turn, makes it possible to tailor and fine‐tune many properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific multifunctional systems for applications. In particular, the field of “Hybrid‐Optics” has been very productive not only scientifically but also in terms of applications. Indeed, numerous optical devices based on hybrids are already in, or very close, to the market. This review describes most of the recent advances performed in this field. Emphasis will be given to luminescent, photochromic, NLO and plasmonic properties. As an outlook we show that the controlled coupling between plasmonics and luminescence is opening a land of opportunities in the field of “Hybrid‐Optics”.

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Section: Dispersion Of Dyes In Sol-gel or Organic Materialsmentioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

249

116

View full text Add to dashboard Cite

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“…6−10 As such, the supramolecules formed from the self-assembly of these metals and ligands have been widely investigated in many fields such as synthetic chemistry, medicinal chemistry, biochemistry, bioimaging, photovoltaics, photocatalysis, etc. 3,5,11,12 Platinum complexes have developed particularly rapidly because of their facile syntheses and varied applications in electroluminescence, photovoltaics, medicinal chemistry, photocatalysis, molecular devices, chemical sensors, nanomaterials, etc. 5,9,13−15 The interest in these complexes has motivated a wide range of studies: Stang et al 16−19 developed synthetic methodologies to obtain numerous platinum-based SCCs through coordination-driven self-assembly.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Zhao et al 6,9,20,21 developed a number of platinum complexes with much longer phosphorescence lifetimes with demonstrative applications in photo-upconversion, oxygen sensing, photoinduced charge transfer, etc. Wong et al 11,12,22−24 designed a series of new platinum-containing organometallic complexes that exhibit good thermal stability and photophysical properties for solar cell applications. Various experimental techniques and theoretical methods such as two-photon absorption, transient absorption, time-resolved infrared spectroscopy, and density functional theory (DFT)/time-dependent density functional theory (TDDFT) quantum chemistry calculations have been used to study the photophysics and intra/intermolecular energy-and electron-transfer processes of these platinum complexes.…”

Section: ■ Introductionmentioning

confidence: 99%

Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries

et al. 2013

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In this work, spectroscopic techniques and quantum chemistry calculations were used to investigate the photophysical properties of various multinuclear platinum complexes with different conformational geometries. This suite of complexes includes a Pt−pyridyl square, a Pt−carboxylate triangle, and a mixed Pt−pyridyl−carboxylate rectangle, as well as two mononuclear Pt model complexes. Studying the individual molecular precursors in the context of larger assemblies is important to provide a complete understanding of the factors governing the observed photophysical properties of a given system. The absorption and emission bands of the parent linear dipyridyl donor (ligand 1) are largely preserved in the [4 + 4] square and the multicomponent [4 + 2 + 2] rectangle (3 and 4, respectively), with significant red shifts. The [3 + 3] Pt− carboxylate triangle containing p-phthalic acid is nonemissive. Phosphorescence and nanosecond transient spectroscopy on 3 and 4 reveal that the introduction of platinum atoms enhances spin−orbital coupling, thereby increasing the rate of intersystem crossing. This phenomenon is consistent with the low fluorescence quantum yields and short fluorescence lifetimes of 3 and 4. Moreover, the electronic structures for the ground state and low-lying excited states of these compounds were studied using quantum chemistry calculations. The fluorescent states of the platinum complexes are local excited states of ligand-centered π−π* transition features, whereas the nonfluorescent states are intramolecular charge-transfer states. These low-lying intramolecular charge-transfer states are responsible for the nonemissive nature of small molecules 1 and 2 and triangle 5. As the interactions between these components determine the properties of their corresponding assemblies, we establish novel excitedstate decay mechanisms which dictate the observed spectra.

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“…9,20,21 Although these and other classes of chromophores, such as porphyrins, 15,16 show promising nonlinearities, performance is hampered by linear absorption in the visible wavelength region. [22][23][24] Pt-acetylides show good OPL response throughout the visible wavelength band while retaining low linear absorption. 11,22,23,[25][26][27][28][29] For practical applications, bulk solid materials have obvious advantages over liquids.…”

Section: Introductionmentioning

confidence: 99%

How to assess good candidate molecules for self-activated optical power limiting

et al. 2018

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Abstract. Reverse saturable absorbers have shown great potential to attenuate laser radiation. Good candidate molecules and various particles have successfully been incorporated into different glass matrices, enabling the creation of self-activated filters against damaging laser radiation. Although the performance of such filters has been impressive, work is still ongoing to improve the performance in a wider range of wavelengths and pulse widths. The purpose of this tutorial is, from an optical engineering perspective, to give an understanding of the strengths and weaknesses of this class of smart materials, how relevant photophysical parameters are measured and influence system performance and comment on the pitfalls in experimental evaluation of materials. A numerical population model in combination with simple physical formulas is used to demonstrate system behavior from a performance standpoint. Geometrical reasoning shows the advantage of reverse saturable absorption over nonlinear scattering due to a fraction of scattered light being recollected by imaging system optics. The numerical population model illustrates the importance of the optical power limiting performance during the leading edge of a nanosecond pulse, which is most strongly influenced by changes in the two-photon absorption cross section and the triplet linear absorption cross section for a modeled Pt-acetylide. This tutorial not only targets optical engineers evaluating reverse saturable absorbing materials but also aims to assist researchers with a chemistry background working on optical power limiting materials. We also present photophysical data for a series of coumarins that can be useful for the determination of quantum yields and two-photon cross sections and show examples of characterization of molecules with excited triplet states.

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Organometallic acetylides of PtII, AuI and HgII as new generation optical power limiting materials

Cited by 337 publications

References 121 publications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Photophysical Properties of Self-Assembled Multinuclear Platinum Metallacycles with Different Conformational Geometries

How to assess good candidate molecules for self-activated optical power limiting

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