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Silica hybrid sol-gel materials with unusually high concentration of Pt-organic molecular guests: Studies of luminescence and nonlinear absorption of light
Laboratoire de Chimie, Université de Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS UMR5182, Lyon 69364, France.
Laboratoire de Chimie, Université de Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS UMR5182, Lyon 69364, France.
Information Systems, Swedish Defence Research Agency (FOI), Linköping SE-581 11, Sweden.
Department of Physics, Norwegian University of Science and Technology, Trondheim NO-7491, Norway.
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2012 (Engelska)Ingår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 4, nr 5, s. 2369-2377Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The development of new photonic materials is a key step towards improvement of existing optical devices and for the preparation of a new generation of systems. Therefore synthesis of photonic hybrid materials with a thorough understanding and control of the microstructure-to-properties relationships is crucial. In this perspective, a new preparation method based on fast gelation reactions using simple dispersion of dyes without strong covalent bonding between dye and matrix has been developed. This new sol-gel method is demonstrated through synthesis of monolithic siloxane-based hybrid materials highly doped by various platinum(II) acetylide derivatives. Concentrations of the chromophores as high as 400 mM were obtained and resulted in unprecedented optical power limiting (OPL) performance at 532 nm of the surface-polished solids. Static and time-resolved photoluminescence of the prepared hybrid materials were consistent with both OPL data and previous studies of similar Pt(II) compounds in solution. The impacts of the microstructure and the chemical composition of the matrix on the spectroscopic properties, are discussed.

Ort, förlag, år, upplaga, sidor
Washington: American Chemical Society (ACS), 2012. Vol. 4, nr 5, s. 2369-2377
Nyckelord [en]
sol−gel, hybrid materials, xerogel, monolith, nonlinear absorption, optical power limiting, platinum
Nationell ämneskategori
Kemi
Identifikatorer
URN: urn:nbn:se:umu:diva-54413DOI: 10.1021/am2015537PubMedID: 22276683OAI: oai:DiVA.org:umu-54413DiVA, id: diva2:523735
Tillgänglig från: 2012-04-26 Skapad: 2012-04-26 Senast uppdaterad: 2018-06-08Bibliografiskt granskad
Ingår i avhandling
1. Synthesis and development of compounds for nonlinear absorption of light
Öppna denna publikation i ny flik eller fönster >>Synthesis and development of compounds for nonlinear absorption of light
2012 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

High-intensity light — for instance that from a laser — can be destructive, not only to the human eye, but also to equipment such as imaging sensors and optical communication devices. Therefore, effective protection against such light is desirable. A protection device should ideally have high transmission to non-damaging light, and should also be fast-acting in order to effectively stop high-intensity light.

In working towards a protection device, there is a need to conduct fundamental research in order to understand the processes involved. One of the photophysical processes of special interest in the field of optical power limiting (OPL) is reverse saturable absorption, where a compound in an excited state absorbs light more strongly than it does in its ground state.

In this work, several novel organoplatinum compounds for OPL, rationally designed to have a strong reverse saturable absorption, have been synthesized. The compounds have been analyzed using linear and nonlinear absorption spectroscopy, luminescence spectroscopy, and quantum chemistry calculations to gain further knowledge regarding their photophysical properties.

In addition to this fundamental research, the absorption capabilities of some of these compounds indicate that they can be used for OPL applications. Consequently, compounds from these studies have been incorporated into a sol–gel glass that could be used in optical systems.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå universitet, 2012. s. 50
Nyckelord
Platinum acetylide, nonlinear absorption, optical power limiting, oxazole, quantum chemistry calculation, quantum chemical calculation, triplet absorption
Nationell ämneskategori
Organisk kemi
Forskningsämne
organisk kemi; fysikalisk kemi; kvantkemi
Identifikatorer
urn:nbn:se:umu:diva-60190 (URN)978-91-7459-503-1 (ISBN)
Disputation
2012-11-02, KBC-huset, KB3A9, Umeå universitet, Umeå, 10:00 (Engelska)
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Tillgänglig från: 2012-10-12 Skapad: 2012-10-04 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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Eliasson, BertilKindahl, Tomas

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