title: Silica hybrid sol-gel materials with unusually high concentration of Pt-organic molecular guests: studies of luminescence and nonlinear absorption of light.
abstract: The development of new photonic materials is a key step toward 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.
authors.affiliation: Laboratoire de Chimie, Université de Lyon, Université Claude Bernard Lyon 1, ENS Lyon, CNRS UMR5182, Lyon 69364, France.
authors.forename: Denis
authors.initials: D
authors.lastname: Chateau
authors.forename: Frédéric
authors.initials: F
authors.lastname: Chaput
authors.forename: Cesar
authors.initials: C
authors.lastname: Lopes
authors.forename: Mikael
authors.initials: M
authors.lastname: Lindgren
authors.forename: Carl
authors.initials: C
authors.lastname: Brännlund
authors.forename: Johan
authors.initials: J
authors.lastname: Öhgren
authors.forename: Nikolay
authors.initials: N
authors.lastname: Djourelov
authors.forename: Patrick
authors.initials: P
authors.lastname: Nedelec
authors.forename: Cedric
authors.initials: C
authors.lastname: Desroches
authors.forename: Bertil
authors.initials: B
authors.lastname: Eliasson
authors.forename: Tomas
authors.initials: T
authors.lastname: Kindahl
authors.forename: Frédéric
authors.initials: F
authors.lastname: Lerouge
authors.forename: Chantal
authors.initials: C
authors.lastname: Andraud
authors.forename: Stephane
authors.initials: S
authors.lastname: Parola