Structural, Photophysical, and Nonlinear Absorption Properties of<i>trans</i>-Di-arylalkynyl Platinum(II) Complexes with Phenyl and Thiophenyl Groups

Lind, Per; Boström, Dan; Carlsson, Marcus; Eriksson, Anders; Glimsdal, Eirik; Lindgren, Mikael; Eliasson, Bertil

doi:10.1021/jp066569p

Cited by 35 publications

(71 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By the use of time-correlated single photon counting (TC-SPC), lifetimes in the range ∼50 ps to 1 μs can be determined (i.e., fluorescence). 69 Longer lifetimes due to phosphorescence can usually be measured directly with a fast photodiode or other schemes utilizing the photon counting PMT detector, such as multichannel scaling (MSC). 70 If an fs-laser is used for excitation, one can readily measure the two-photon absorption with the same data collection system (see below).…”

Section: General Appearance Of Linear Absorption and Emission Processesmentioning

confidence: 99%

“…The pulse-picker is necessary to reduce the pulse repetition frequency (PRF) of the laser if longer lifetimes are to be investigated. 68,69 By scanning the monochromators, the spectral properties for a given excitation wavelength and pulse configuration can be systematically studied. A representative fluorescence lifetime decay of C110 and phosphorescence decay of Pt-OEP are shown in Fig.…”

Section: General Appearance Of Linear Absorption and Emission Processesmentioning

confidence: 99%

“…It is important that the "unknown sample" and the reference sample have some spectral overlap, so that the full emission band can be recorded at the same excitation wavelength. 69,71 For a series of concentrations, the associated integrated emission spectrum is plotted versus absorbance for each sample, at the relevant excitation wavelength. The resulting slope is proportional to the QE, and thus the unknown sample can be measured from the equation E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 6 ; 3 2 6 ; 1 6 4 …”

Section: Quantum Efficiency and Two-photon Absorption Cross Section Fmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2018

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: General Appearance Of Linear Absorption and Emission Processesmentioning

confidence: 99%

Section: General Appearance Of Linear Absorption and Emission Processesmentioning

confidence: 99%

Section: Quantum Efficiency and Two-photon Absorption Cross Section Fmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…[5,10,11] Complex 1a has been extensively studied in solution for its nonlinear absorption properties, [5,[10][11][12] and we have recently prepared several related molecules with repeating arylethynyl groups in trans configuration for comparisons with 1a. [13][14][15][16][17] The solution OPL studies of platinum polymeric structures have also been reported recently. [18][19][20] The solutions of the compounds (usually in tetrahydrofuran) show good OPL properties and are fairly transparent in the visible region.…”

Section: Introductionmentioning

confidence: 95%

Preparation of Functional Hybrid Glass Material from Platinum (II) Complexes for Broadband Nonlinear Absorption of Light

Zieba

Desroches

Chaput

et al. 2009

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

The synthesis of trans‐di(arylalkynyl)diphosphine platinum(II) complexes bearing trialkoxysilane groups is described, as well as the preparation of siloxane‐based hybrid materials from organometallic chromophores through a modified sol–gel process. Glass materials prepared from trans‐[P(n–Bu)3]2Pt[(C≡C–p–C6H4–C≡C–p–C6H4–CH2O(CO)NH(CH2)3Si(OC2H5)3]2 generally show spectral transmittance, absorption and luminescence similar to that of solutions reported in the literature. Measurements of optical power limiting for the hybrid glass are carried out, and show broadband nonlinear absorption throughout the whole visible wavelength range with clamping values in the range 0.2–7 µJ at 120 mM chromophore concentration. The sol–gel process using urethane‐propyltriethoxysilane‐functionalized chromophores as precursors appears to be a valid method for formation of robust silicate materials with grafted diarylethynyl Pt(II) complexes for OPL devices.

show abstract

“…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%

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

Lundén¹

2017

View full text Add to dashboard Cite

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...

show abstract

Structural, Photophysical, and Nonlinear Absorption Properties oftrans-Di-arylalkynyl Platinum(II) Complexes with Phenyl and Thiophenyl Groups

Cited by 35 publications

References 62 publications

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

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

Preparation of Functional Hybrid Glass Material from Platinum (II) Complexes for Broadband Nonlinear Absorption of Light

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

Contact Info

Product

Resources

About