Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
Chemistry. 2010 Jan 25;16(4):1212-20. doi: 10.1002/chem.200901499.
The complex 2,(3)-tetrabromo-3,(2)-tetra[(3,5-di-tert-butyl)phenyloxy]-naphthalocyaninato lead [Br(4)(tBu(2)C(6)H(3)O)(4)NcPb, 1] has been prepared and its optical limiting properties for ns light pulses have been measured. Complex 1 behaves as a reverse saturable absorber within the spectral range 440-720 nm with a limiting threshold of 0.1 J cm(-2) at 532 nm. The lifetime of the absorbing triplet excited state has been evaluated as 3.8 x 10(-7) s and the quantum yield of triplet formation has been measured as 0.07 in toluene. The nonlinear optical transmission properties of complex 1 have also been determined in Plexiglas [naphthalocyanine content: 5.0 x 10(-4) M (0.1% by weight)]. A reversible nonlinear absorption was again observed for a fluence above 0.4 J cm(-2), but through different excited-state dynamics. This may be rationalized in terms of aggregation of the molecule in the polymer matrix.
已制备出[Br(4)(tBu(2)C(6)H(3)O)(4)NcPb，1]的配合物，并测量了其对 ns 光脉冲的光限幅性能。配合物 1 在 440-720nm 的光谱范围内表现为反饱和吸收体，在 532nm 时的限幅阈值为 0.1Jcm(-2)。已评估出三重态吸收态的寿命为 3.8×10(-7)s，并且在甲苯中测量到的三重态形成量子产率为 0.07。还在 Plexiglas 中确定了配合物 1 的非线性光学透射特性[酞菁含量：5.0×10(-4)M（重量的 0.1%）]。对于超过 0.4Jcm(-2)的通量，再次观察到可逆的非线性吸收，但通过不同的激发态动力学。这可以根据分子在聚合物基质中的聚集来合理化。
