کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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175751 | 458920 | 2015 | 13 صفحه PDF | دانلود رایگان |
• A series of multi-polar chromophores based on the structural motif of pyrazine-fused truxene has been synthesized.
• These model fluorophores manifest strong and wide dispersed two-photon absorption in the near infrared region.
• Optical-power-limiting/stabilization behavior of a representative dye molecule is demonstrated.
A new set of model chromophores derived from a truxene core fused with varied number and size of functionalized pyrazine units was designed and synthesized for the tentative exploration of possible connections between the molecular structure and their linear/nonlinear optical properties. The initial experimental results have indicated that these model compounds not only possess strong and widely dispersed two-photon absorption (2 PA) within the near-IR region but also show the ascending overall 2 PA when the molecular structure varies with increase in complexity and molecular weight, which implies that both the number of branches and the size of π-framework are important factors to the molecular 2 PA in this model chromophore system. On the other hand, the studied model chromophores also manifest very good photostability within their two-photon active spectral region even under a prolonged irradiation of IR laser pulses. In addition, a representative chromophore is selected to demonstrate optical power-limiting and power-stabilization performance against nanosecond laser pulses.
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Journal: Dyes and Pigments - Volume 120, September 2015, Pages 99–111