title: Nonlinear transmission of a tetrabrominated naphthalocyaninato indium chloride.
abstract: The axially substituted complex chloro indium(III) 2-tetrabromo-3-tetra-(3,5-di-tert-butylphenyloxy)naphthalocyanine [Br4(tBu2PhO)4NcInCl (1); MW = 1996] has been synthesized for the first time, and its nonlinear transmission properties have been evaluated with the Z-scan technique in both open and closed aperture configurations at 532 nm for nanosecond pulsed radiation. The tetrabrominated complex 1 displayed a larger positive nonlinear absorption coefficient when compared to an analogous nonbrominated naphthalocyanine [(tBu2PhO)8NcInCl (2); MW = 2498]. The effect of the four Br atoms on the nonlinear optical behavior of 1 is evaluated, discussed, and compared with the nonlinear optical behavior of 2. It is shown that the bromination of the naphthalocyanine ring considerably improves the limiting properties of such a system when high-intensity radiations are produced by nanosecond laser pulses at 532 nm.
authors.affiliation: Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany. danilo.dini@uni-tuebingen.de
authors.forename: Danilo
authors.initials: D
authors.lastname: Dini
authors.forename: Mario J F
authors.initials: MJ
authors.lastname: Calvete
authors.forename: Michael
authors.initials: M
authors.lastname: Hanack
authors.forename: Richard G S
authors.initials: RG
authors.lastname: Pong
authors.forename: Steven R
authors.initials: SR
authors.lastname: Flom
authors.forename: James S
authors.initials: JS
authors.lastname: Shirk