Photophysical Characterization of a Series of Platinum(II)-Containing Phenyl−Ethynyl Oligomers

Rogers, Joy E.; Cooper, Thomas M.; Fleitz, Paul A.; Glass, Douglas J.; McLean, Daniel G.

doi:10.1021/jp021263d

Cited by 151 publications

(324 citation statements)

References 38 publications

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“…Due to their similarity photophysical constants for PE2 is used in the population modelling work (chapter 4). The singlet absorption peak is located in the UV, with a large absorbance up to 9 · 10 4 /Mcm at around 355 nm (in benzene solution) [13]. The triplet absorption peak is broadband and covers the visible range [13,48].…”

Section: Pe2mentioning

confidence: 99%

“…Prof. M. Thanks to the two-photon absorption spectra of the two chromophores recently published by M. G. Vivas et al [9,10], in combination with an analytical model of field enhancement by K. Tanabe [11] and the concept of feeding a population model the field enhancement field by S. Fischer et al [12] it was possible for me to create a qualitative model describing system behaviour using photophysical parameters of very similar chromophores published by Rogers et al [13]. By modeling the relative absorption enhancement from field enhancement of two-photon absorption it was possible to show that the gold nanoparticles caused the highly absorbing triplet state to be populated more quickly during the leading edge of the pulse.…”

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

“…Both PE2 and PE3 have been well characterized and reported about in the literature [9,10,13]. A summary of relevant photophysical parameters from the literature is given in section 1.6.…”

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

“…The platinum acetylides are characterized by fast inter system crossing times, high excited state absorption, good two-photon absorption and long triplet lifetimes [9,47]. The singlet absorption peak is often in the UV/deep blue range while the triplet absorption cover a wide wavelength range [13,[46][47][48][49][50][51]. The low ground state absorption of platinum acetylenes in the visible make them excellent reverse saturable absorbers (section 1.3.3) [47].…”

Section: Introductionmentioning

confidence: 99%

“…These two chromophores show a strong triplet state absorption in the order of 10 4 to 10 5 /Mcm in the visible while the singlet absorption peaks are in the UV [13]. The chromophores have been functionalized with CH 2 OH to facilitate dissolving into the matrix precursor [1].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Lundén¹

2017

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High power laser pulses can be a threat to sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that blocks radiation in chosen wavelength ranges. Colour filters' main drawback is that they block radiation regardless of it being useful or damaging, information is removed for wavelengths at which the filter protect. Protecting the entire wavelength range of a sensor would block or strongly attenuate the radiation needed for the operation of the sensor.Sol-gel glasses highly doped with Pt-Acetylide chromophores have previously shown high optical quality in combination with efficient optical power limiting through reverse saturable absorption 1 . These filters will transmit visible light unless the light fluence is above a certain threshold. A key design consideration of laser protection filters is linear absorption in relation to threshold level. By increasing chromophore concentration the threshold is lowered at the expense of higher linear absorption. This means that the user's view is degraded through the filter.Adding small amounts of gold nanoparticles to the glasses resulted in an increase in optical power limiting performance. The optimal concentration of gold nanoparticles corresponded to a mean particle distance of several micrometers. The work in this licentiate thesis is about the characterization and explanation of this effect.The glasses investigated in this work were MTEOS Sol-Gel glasses doped with either only gold nanoparticles of varying shape and concentration, 50 mM of PE2-CH 2 OH codoped with gold nanoparticles or 50 mM of PE3-CH 2 OH codoped with gold nanoparticles. The glasses only doped with gold nanoparticles showed high optical power limiting performance at 532 nm laser wavelength, but no optical power limiting at the fluences tested at 600 nm. The PE2-CH 2 OH glasses codoped with gold nanoparticles showed an enhancement of optical power limiting at 600 nm for the low gold nanoparticle concentration glasses. The enhancement was weak-1 Standard nomenclature, see section 1.3.3.iii iv ened or not present for higher concentrations. A similar enhancement above noise level for the PE3-CH 2 OH glasses was not found.A population model is used to give a qualitative explanation of the findings. The improvement in optical power limiting performance for the PE2-CH 2 OH glasses is explained by the gold nanoparticles helping to more quickly populate the highly absorbing triplet state during the rising edge of the laser pulse by enhancing two-photon absorption. The lack of any marked enhancement for the PE3-CH 2 OH glasses is explained by the PE3-CH 2 OH chromophore already being of sufficiently high performance to quickly populate the highly absorbing triplet state during the rising edge of the laser pulse. Further work is necessary to validate this model against other chromophores and improving its quantitative predictive power. Populärvetenskaplig sammanfattningLaserpulser med hög effekt kan vara ett hot mot sensorer, inklusive människoögat. Traditi...

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Section: Pe2mentioning

confidence: 99%

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

“…Both PE2 and PE3 have been well characterized and reported about in the literature [9,10,13]. A summary of relevant photophysical parameters from the literature is given in section 1.6.…”

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Lundén¹

2017

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Organometallic Polymers

Serrano‐Ruiz

Scalambra

Romerosa

2013

Advances in Organometallic Chemistry and Catalysis

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Optical Properties of Hybrid Organic–inorganic Materials and their Applications – Part II : Nonlinear Optics and Plasmonics

Parola

Julián‐López

Carlos

et al. 2017

Handbook of Solid State Chemistry

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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 “hybrids‐optics.”

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Photophysical Characterization of a Series of Platinum(II)-Containing Phenyl−Ethynyl Oligomers

Cited by 151 publications

References 38 publications

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

Organometallic Polymers

Optical Properties of Hybrid Organic–inorganic Materials and their Applications – Part II : Nonlinear Optics and Plasmonics

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